diff --git a/Node-1st-gen/authenticated-json-api/functions/index.js b/Node-1st-gen/authenticated-json-api/functions/index.js
index 39aaecaed6..3dd431a7aa 100644
--- a/Node-1st-gen/authenticated-json-api/functions/index.js
+++ b/Node-1st-gen/authenticated-json-api/functions/index.js
@@ -17,12 +17,14 @@
 'use strict';
 
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
+const { initializeApp, applicationDefault } = require('firebase-admin/app');
+const { getAuth } = require('firebase-admin/auth');
+const { getDatabase } = require('firebase-admin/database');
 
 // Follow instructions to set up admin credentials:
 // https://firebase.google.com/docs/functions/local-emulator#set_up_admin_credentials_optional
-admin.initializeApp({
-  credential: admin.credential.applicationDefault(),
+initializeApp({
+  credential: applicationDefault(),
   // TODO: ADD YOUR DATABASE URL
   databaseURL: undefined
 });
@@ -44,7 +46,7 @@ const authenticate = async (req, res, next) => {
   }
   const idToken = req.headers.authorization.split('Bearer ')[1];
   try {
-    const decodedIdToken = await admin.auth().verifyIdToken(idToken);
+    const decodedIdToken = await getAuth().verifyIdToken(idToken);
     req.user = decodedIdToken;
     next();
     return;
@@ -74,7 +76,7 @@ app.post('/api/messages', async (req, res) => {
 
     // @ts-ignore
     const uid = req.user.uid;
-    await admin.database().ref(`/users/${uid}/messages`).push(data);
+    await getDatabase().ref(`/users/${uid}/messages`).push(data);
 
     res.status(201).json({message, category});
   } catch(error) {
@@ -94,8 +96,8 @@ app.get('/api/messages', async (req, res) => {
   const uid = req.user.uid;
   const category = `${req.query?.category ?? ''}`;
 
-  /** @type admin.database.Query */
-  let query = admin.database().ref(`/users/${uid}/messages`);
+  /** @type {import('firebase-admin/database').Query} */
+  let query = getDatabase().ref(`/users/${uid}/messages`);
 
   if (category && ['positive', 'negative', 'neutral'].indexOf(category) > -1) {
     // Update the query with the valid category
@@ -129,7 +131,7 @@ app.get('/api/message/:messageId', async (req, res) => {
   try {
     // @ts-ignore
     const uid = req.user.uid;
-    const snapshot = await admin.database().ref(`/users/${uid}/messages/${messageId}`).once('value');
+    const snapshot = await getDatabase().ref(`/users/${uid}/messages/${messageId}`).once('value');
 
     if (!snapshot.exists()) {
       return res.status(404).json({errorCode: 404, errorMessage: `message '${messageId}' not found`});
diff --git a/Node-1st-gen/convert-images/functions/index.js b/Node-1st-gen/convert-images/functions/index.js
index e40890c5ee..4c418b33e0 100644
--- a/Node-1st-gen/convert-images/functions/index.js
+++ b/Node-1st-gen/convert-images/functions/index.js
@@ -16,13 +16,14 @@
 'use strict';
 
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
+const { initializeApp } = require('firebase-admin/app');
+const { getStorage } = require('firebase-admin/storage');
 const spawn = require('child-process-promise').spawn;
 const path = require('path');
 const os = require('os');
 const fs = require('fs');
 
-admin.initializeApp();
+initializeApp();
 
 // File extension for the created JPEG files.
 const JPEG_EXTENSION = '.jpg';
@@ -52,7 +53,7 @@ exports.imageToJPG = functions.storage.object().onFinalize(async (object) => {
     return null;
   }
 
-  const bucket = admin.storage().bucket(object.bucket);
+  const bucket = getStorage().bucket(object.bucket);
   // Create the temp directory where the storage file will be downloaded.
   await fs.promises.mkdir(tempLocalDir, { recursive: true });
   // Download file from bucket.
diff --git a/Node-1st-gen/coupon-on-purchase/functions/index.js b/Node-1st-gen/coupon-on-purchase/functions/index.js
index bfdb691f57..07c8638bb2 100644
--- a/Node-1st-gen/coupon-on-purchase/functions/index.js
+++ b/Node-1st-gen/coupon-on-purchase/functions/index.js
@@ -16,8 +16,10 @@
 'use strict';
 
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getMessaging } = require('firebase-admin/messaging');
+const { getDatabase } = require('firebase-admin/database');
+initializeApp();
 
 // [START all]
 /**
@@ -70,7 +72,7 @@ async function sendCouponViaFCM(uid, userLanguage) {
     }
 
     // Send notifications to all tokens.
-    return admin.messaging().sendEachForMulticast({
+    return getMessaging().sendEachForMulticast({
       notification: payload.notification,
       tokens
     });
@@ -107,7 +109,7 @@ async function sendHighValueCouponViaFCM(uid, userLanguage) {
     }
 
     // Send notifications to all tokens.
-    return admin.messaging().sendEachForMulticast({
+    return getMessaging().sendEachForMulticast({
       notification: payload.notification,
       tokens
     });
@@ -121,7 +123,7 @@ async function sendHighValueCouponViaFCM(uid, userLanguage) {
  * @param {string} uid The UID of the user.
  */
 async function getDeviceTokens(uid) {
-  const snap = await admin.database().ref(`/users/${uid}/tokens`).once('value');
+  const snap = await getDatabase().ref(`/users/${uid}/tokens`).once('value');
   if (snap.exists()) {
     return Object.keys(snap.val());
   }
diff --git a/Node-1st-gen/delete-unused-accounts-cron/functions/index.js b/Node-1st-gen/delete-unused-accounts-cron/functions/index.js
index c912b60518..6f10cc8b40 100644
--- a/Node-1st-gen/delete-unused-accounts-cron/functions/index.js
+++ b/Node-1st-gen/delete-unused-accounts-cron/functions/index.js
@@ -16,8 +16,9 @@
 'use strict';
 
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getAuth } = require('firebase-admin/auth');
+initializeApp();
 const PromisePool = require('es6-promise-pool').default;
 // Maximum concurrent account deletions.
 const MAX_CONCURRENT = 3;
@@ -45,7 +46,7 @@ function deleteInactiveUser(inactiveUsers) {
     const userToDelete = inactiveUsers.pop();
     
     // Delete the inactive user.
-    return admin.auth().deleteUser(userToDelete.uid).then(() => {
+    return getAuth().deleteUser(userToDelete.uid).then(() => {
       return functions.logger.log(
         'Deleted user account',
         userToDelete.uid,
@@ -68,7 +69,7 @@ function deleteInactiveUser(inactiveUsers) {
  * Returns the list of all inactive users.
  */
 async function getInactiveUsers(users = [], nextPageToken) {
-  const result = await admin.auth().listUsers(1000, nextPageToken);
+  const result = await getAuth().listUsers(1000, nextPageToken);
   // Find users that have not signed in in the last 30 days.
   const inactiveUsers = result.users.filter(
       user => Date.parse(user.metadata.lastRefreshTime || user.metadata.lastSignInTime) < (Date.now() - 30 * 24 * 60 * 60 * 1000));
diff --git a/Node-1st-gen/developer-motivator/functions/index.js b/Node-1st-gen/developer-motivator/functions/index.js
index c79bd860cb..7d69fe088a 100644
--- a/Node-1st-gen/developer-motivator/functions/index.js
+++ b/Node-1st-gen/developer-motivator/functions/index.js
@@ -15,10 +15,11 @@
  */
 'use strict';
 
-const admin = require('firebase-admin');
+const { initializeApp } = require('firebase-admin/app');
+const { getMessaging } = require('firebase-admin/messaging');
 const functions = require('firebase-functions/v1');
 const {defineSecret} = require('firebase-functions/params');
-admin.initializeApp();
+initializeApp();
 
 // TODO: Make sure you configure the 'DEV_MOTIVATOR_DEVICE_TOKEN' secret.
 const devMotivatorDeviceToken = defineSecret('DEV_MOTIVATOR_DEVICE_TOKEN');
@@ -37,7 +38,7 @@ exports.appinstalled = functions.runWith({secrets: [devMotivatorDeviceToken]}).a
     }
   };
 
-  return admin.messaging().send({token: devMotivatorDeviceToken.value(), notification: payload.notification});
+  return getMessaging().send({token: devMotivatorDeviceToken.value(), notification: payload.notification});
 });
 
 /**
@@ -56,5 +57,5 @@ exports.appremoved = functions.runWith({secrets: [devMotivatorDeviceToken]}).ana
     }
   };
 
-  return admin.messaging().send({token: devMotivatorDeviceToken.value(), notification: payload.notification});
+  return getMessaging().send({token: devMotivatorDeviceToken.value(), notification: payload.notification});
 });
diff --git a/Node-1st-gen/exif-images/functions/index.js b/Node-1st-gen/exif-images/functions/index.js
index c85c4a2991..e22fcde07f 100644
--- a/Node-1st-gen/exif-images/functions/index.js
+++ b/Node-1st-gen/exif-images/functions/index.js
@@ -21,8 +21,9 @@ const crypto = require('crypto');
 const path = require('path');
 const os = require('os');
 
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getDatabase } = require('firebase-admin/database');
+initializeApp();
 const { Storage } = require('@google-cloud/storage');
 const spawn = require('child-process-promise').spawn;
 
@@ -54,7 +55,7 @@ exports.metadata = functions.storage.object().onFinalize(async (object) => {
   // Save metadata to realtime datastore.
   metadata = imageMagickOutputToObject(result.stdout);
   const safeKey = makeKeyFirebaseCompatible(filePath);
-  await admin.database().ref(safeKey).set(metadata);
+  await getDatabase().ref(safeKey).set(metadata);
   functions.logger.log('Wrote to:', filePath, 'data:', metadata);
   // Cleanup temp directory after metadata is extracted
   // Remove the file from temp directory
diff --git a/Node-1st-gen/fcm-notifications/functions/index.js b/Node-1st-gen/fcm-notifications/functions/index.js
index d71fa9ce42..71a765e144 100644
--- a/Node-1st-gen/fcm-notifications/functions/index.js
+++ b/Node-1st-gen/fcm-notifications/functions/index.js
@@ -16,8 +16,11 @@
 'use strict';
 
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getAuth } = require('firebase-admin/auth');
+const { getDatabase } = require('firebase-admin/database');
+const { getMessaging } = require('firebase-admin/messaging');
+initializeApp();
 
 /**
  * Triggers when a user gets a new follower and sends a notification.
@@ -46,11 +49,11 @@ exports.sendFollowerNotification = functions.database.ref('/followers/{followedU
       );
 
       // Get the list of device notification tokens.
-      const getDeviceTokensPromise = admin.database()
+      const getDeviceTokensPromise = getDatabase()
           .ref(`/users/${followedUid}/notificationTokens`).once('value');
 
       // Get the follower profile.
-      const getFollowerProfilePromise = admin.auth().getUser(followerUid);
+      const getFollowerProfilePromise = getAuth().getUser(followerUid);
 
       // The snapshot to the user's tokens.
       let tokensSnapshot;
@@ -87,7 +90,7 @@ exports.sendFollowerNotification = functions.database.ref('/followers/{followedU
       // Listing all tokens as an array.
       tokens = Object.keys(tokensSnapshot.val());
       // Send notifications to all tokens.
-      const {responses} = await admin.messaging().sendEachForMulticast({
+      const {responses} = await getMessaging().sendEachForMulticast({
         notification: payload.notification,
         tokens,
       });
diff --git a/Node-1st-gen/fulltext-search-firestore/functions/elastic.js b/Node-1st-gen/fulltext-search-firestore/functions/elastic.js
index f8eaf4f0ae..29c1ea69f5 100644
--- a/Node-1st-gen/fulltext-search-firestore/functions/elastic.js
+++ b/Node-1st-gen/fulltext-search-firestore/functions/elastic.js
@@ -33,9 +33,11 @@ onInit(() => {
   client = new Client({
     cloud: {
       id: elasticId.value(),
+    },
+    auth: {
       username: elasticUsername.value(),
       password: elasticPassword.value(),
-    }
+    },
   });
 });
 // [END init_elastic]
diff --git a/Node-1st-gen/fulltext-search-firestore/functions/index.js b/Node-1st-gen/fulltext-search-firestore/functions/index.js
index 4aeddfa452..f3321c6a6d 100644
--- a/Node-1st-gen/fulltext-search-firestore/functions/index.js
+++ b/Node-1st-gen/fulltext-search-firestore/functions/index.js
@@ -51,8 +51,9 @@ exports.onNoteCreated = functions.runWith({secrets: [algoliaId, algoliaAdminKey]
 // [END update_index_function]
 
 // [START get_firebase_user]
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getAuth } = require('firebase-admin/auth');
+initializeApp();
 
 async function getFirebaseUser(req, res, next) {
   functions.logger.log('Check if request is authorized with Firebase ID token');
@@ -73,7 +74,7 @@ async function getFirebaseUser(req, res, next) {
   }
 
   try {
-    const decodedIdToken = await admin.auth().verifyIdToken(idToken);
+    const decodedIdToken = await getAuth().verifyIdToken(idToken);
     functions.logger.log('ID Token correctly decoded', decodedIdToken);
     req.user = decodedIdToken;
     return next();
diff --git a/Node-1st-gen/fulltext-search-firestore/functions/typesense.js b/Node-1st-gen/fulltext-search-firestore/functions/typesense.js
index c66ec5169c..eadcc94c9e 100644
--- a/Node-1st-gen/fulltext-search-firestore/functions/typesense.js
+++ b/Node-1st-gen/fulltext-search-firestore/functions/typesense.js
@@ -31,7 +31,7 @@ onInit(() => {
   client = new Typesense.Client({
     'nodes': [{
       'host': 'xxx.a1.typesense.net', // where xxx is the ClusterID of your Typesense Cloud cluster
-      'port': '443',
+      'port': 443,
       'protocol': 'https'
     }],
     'apiKey': typesenseAdminApiKey.value(),
diff --git a/Node-1st-gen/fulltext-search-firestore/public/index.js b/Node-1st-gen/fulltext-search-firestore/public/index.js
index 914f53eaf0..f96c2eab07 100644
--- a/Node-1st-gen/fulltext-search-firestore/public/index.js
+++ b/Node-1st-gen/fulltext-search-firestore/public/index.js
@@ -52,7 +52,10 @@ function searchAlgoliaAuthenticated(query) {
   return firebase.auth().currentUser.getIdToken()
     .then(function(token) {
       // The token is then passed to our getSearchKey Cloud Function
-      return fetch('https://us-central1-' + PROJECT_ID + '.cloudfunctions.net/getSearchKey/', {
+      const searchKeyUrl = new URL(
+        `https://us-central1-${PROJECT_ID}.cloudfunctions.net/getSearchKey/`
+      );
+      return fetch(searchKeyUrl, {
           headers: { Authorization: 'Bearer ' + token }
       });
     })
diff --git a/Node-1st-gen/fulltext-search/functions/index.js b/Node-1st-gen/fulltext-search/functions/index.js
index eb2e9fa065..d808e67803 100644
--- a/Node-1st-gen/fulltext-search/functions/index.js
+++ b/Node-1st-gen/fulltext-search/functions/index.js
@@ -18,8 +18,9 @@
 const functions = require('firebase-functions/v1');
 const {onInit} = require('firebase-functions/v1/init');
 const {defineSecret} = require('firebase-functions/params');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getDatabase } = require('firebase-admin/database');
+initializeApp();
 
 // Authenticate to Algolia Database.
 // TODO: Make sure you configure the `ALGOLIA_APP_ID` and `ALGOLIA_API_KEY` secrets.
@@ -62,5 +63,5 @@ exports.searchentry = functions.runWith({secrets: [algoliaAppId, algoliaApiKey]}
         '/search/last_query_timestamp': Date.parse(context.timestamp),
       };
       updates[`/search/results/${key}`] = content;
-      return admin.database().ref().update(updates);
+      return getDatabase().ref().update(updates);
     });
diff --git a/Node-1st-gen/google-sheet-sync/functions/index.js b/Node-1st-gen/google-sheet-sync/functions/index.js
index ccc3015aca..4564a86349 100644
--- a/Node-1st-gen/google-sheet-sync/functions/index.js
+++ b/Node-1st-gen/google-sheet-sync/functions/index.js
@@ -20,8 +20,9 @@
 const functions = require('firebase-functions/v1');
 const {onInit} = require('firebase-functions/v1/init');
 const {defineString, defineSecret} = require('firebase-functions/params');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getDatabase } = require('firebase-admin/database');
+initializeApp();
 const {OAuth2Client} = require('google-auth-library');
 const {google} = require('googleapis');
 
@@ -70,7 +71,7 @@ exports.oauthcallback = functions.runWith({secrets: [googleApiClientId, googleAp
   try {
     const { tokens } = await functionsOauthClient.getToken(code);
     // Now tokens contains an access_token and an optional refresh_token. Save them.
-    await admin.database().ref(DB_TOKEN_PATH).set(tokens);
+    await getDatabase().ref(DB_TOKEN_PATH).set(tokens);
     res.status(200).send('App successfully configured with new Credentials. '
         + 'You can now close this page.');
   } catch (error) {
@@ -120,7 +121,7 @@ async function getAuthorizedClient() {
     functionsOauthClient.setCredentials(oauthTokens);
     return functionsOauthClient;
   }
-  const snapshot = await admin.database().ref(DB_TOKEN_PATH).once('value');
+  const snapshot = await getDatabase().ref(DB_TOKEN_PATH).once('value');
   oauthTokens = snapshot.val();
   functionsOauthClient.setCredentials(oauthTokens);
   return functionsOauthClient;
@@ -132,7 +133,7 @@ exports.testsheetwrite = functions.https.onRequest(async (req, res) => {
   const random2 = Math.floor(Math.random() * 100);
   const random3 = Math.floor(Math.random() * 100);
   const ID = new Date().getUTCMilliseconds();
-  await admin.database().ref(`${watchedpathsDataPath.value()}/${ID}`).set({
+  await getDatabase().ref(`${watchedpathsDataPath.value()}/${ID}`).set({
     firstColumn: random1,
     secondColumn: random2,
     thirdColumn: random3,
diff --git a/Node-1st-gen/image-maker/functions/clock.js b/Node-1st-gen/image-maker/functions/clock.js
index f9ff6a25cc..9f356fd3e7 100644
--- a/Node-1st-gen/image-maker/functions/clock.js
+++ b/Node-1st-gen/image-maker/functions/clock.js
@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-const _ = require('lodash');
 
 const getDefaultOpts = () => ({
   strokes: {
@@ -39,7 +38,11 @@ const getY = (angle) => {
 };
 
 const clock = (ctx, colorOpts) => {
-  const colors = _.merge({}, getDefaultOpts(), colorOpts);
+  const defaultOpts = getDefaultOpts();
+  const colors = {
+    strokes: Object.assign({}, defaultOpts.strokes, colorOpts && colorOpts.strokes),
+    fills: Object.assign({}, defaultOpts.fills, colorOpts && colorOpts.fills),
+  };
   let x, y, i;
   const now = new Date();
 
diff --git a/Node-1st-gen/instagram-auth/functions/index.js b/Node-1st-gen/instagram-auth/functions/index.js
index b0b48e9811..3e7cac3048 100644
--- a/Node-1st-gen/instagram-auth/functions/index.js
+++ b/Node-1st-gen/instagram-auth/functions/index.js
@@ -22,11 +22,13 @@ const cookieParser = require('cookie-parser');
 const crypto = require('node:crypto');
 
 // Firebase Setup
-const admin = require('firebase-admin');
+const { initializeApp, cert } = require('firebase-admin/app');
+const { getAuth } = require('firebase-admin/auth');
+const { getDatabase } = require('firebase-admin/database');
 // @ts-ignore
 const serviceAccount = require('./service-account.json');
-admin.initializeApp({
-  credential: admin.credential.cert(serviceAccount),
+initializeApp({
+  credential: cert(serviceAccount),
   databaseURL: `https://${process.env.GCLOUD_PROJECT}.firebaseio.com`,
 });
 
@@ -37,6 +39,7 @@ const instagramClientId = defineSecret('INSTAGRAM_CLIENT_ID');
 const instagramClientSecret = defineSecret('INSTAGRAM_CLIENT_SECRET');
 
 const { AuthorizationCode } = require('simple-oauth2');
+let oauth2;
 onInit(() => {
   // Instagram OAuth 2 setup
   // TODO: Configure the `INSTAGRAM_CLIENT_ID` and `INSTAGRAM_CLIENT_SECRET` secrets.
@@ -129,16 +132,16 @@ async function createFirebaseAccount(instagramID, displayName, photoURL, accessT
   const uid = `instagram:${instagramID}`;
 
   // Save the access token to the Firebase Realtime Database.
-  const databaseTask = admin.database().ref(`/instagramAccessToken/${uid}`).set(accessToken);
+  const databaseTask = getDatabase().ref(`/instagramAccessToken/${uid}`).set(accessToken);
 
   // Create or update the user account.
-  const userCreationTask = admin.auth().updateUser(uid, {
+  const userCreationTask = getAuth().updateUser(uid, {
     displayName: displayName,
     photoURL: photoURL,
   }).catch((error) => {
     // If user does not exists we create it.
     if (error.code === 'auth/user-not-found') {
-      return admin.auth().createUser({
+      return getAuth().createUser({
         uid: uid,
         displayName: displayName,
         photoURL: photoURL,
@@ -150,7 +153,7 @@ async function createFirebaseAccount(instagramID, displayName, photoURL, accessT
   // Wait for all async task to complete then generate and return a custom auth token.
   await Promise.all([userCreationTask, databaseTask]);
   // Create a Firebase custom auth token.
-  const token = await admin.auth().createCustomToken(uid);
+  const token = await getAuth().createCustomToken(uid);
   functions.logger.log(
     'Created Custom token for UID "',
     uid,
diff --git a/Node-1st-gen/lastmodified-tracking/functions/index.js b/Node-1st-gen/lastmodified-tracking/functions/index.js
index 8e4de5973c..61b4b08a3b 100644
--- a/Node-1st-gen/lastmodified-tracking/functions/index.js
+++ b/Node-1st-gen/lastmodified-tracking/functions/index.js
@@ -16,11 +16,12 @@
 'use strict';
 
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getDatabase } = require('firebase-admin/database');
+initializeApp();
 
 /**
  * This Function updates the `/lastmodified` with the timestamp of the last write to `/chat/$message`.
  */
 exports.touch = functions.database.ref('/chat/{message}').onWrite(
-    (change, context) => admin.database().ref('/lastmodified').set(context.timestamp));
+    (change, context) => getDatabase().ref('/lastmodified').set(context.timestamp));
diff --git a/Node-1st-gen/linkedin-auth/functions/index.js b/Node-1st-gen/linkedin-auth/functions/index.js
index 03ab2a6f37..eb7ec51e13 100644
--- a/Node-1st-gen/linkedin-auth/functions/index.js
+++ b/Node-1st-gen/linkedin-auth/functions/index.js
@@ -23,11 +23,13 @@ const cookieParser = require('cookie-parser');
 const crypto = require('crypto');
 
 // Firebase Setup
-const admin = require('firebase-admin');
+const { initializeApp, cert } = require('firebase-admin/app');
+const { getAuth } = require('firebase-admin/auth');
+const { getDatabase } = require('firebase-admin/database');
 // @ts-ignore
 const serviceAccount = require('./service-account.json');
-admin.initializeApp({
-  credential: admin.credential.cert(serviceAccount),
+initializeApp({
+  credential: cert(serviceAccount),
   databaseURL: `https://${process.env.GCLOUD_PROJECT}.firebaseio.com`,
 });
 
@@ -146,16 +148,16 @@ exports.token = functions.runWith({secrets: [linkedinClientId, linkedinClientSec
  */
 async function createFirebaseAccount(linkedinID, displayName, photoURL, email, accessToken) {
   const uid = `linkedin:${linkedinID}`;
-  const databaseTask = admin.database().ref(`/linkedInAccessToken/${uid}`).set(accessToken);
+  const databaseTask = getDatabase().ref(`/linkedInAccessToken/${uid}`).set(accessToken);
 
-  const userCreationTask = admin.auth().updateUser(uid, {
+  const userCreationTask = getAuth().updateUser(uid, {
     displayName: displayName,
     photoURL: photoURL,
     email: email,
     emailVerified: true,
   }).catch((error) => {
     if (error.code === 'auth/user-not-found') {
-      return admin.auth().createUser({
+      return getAuth().createUser({
         uid: uid,
         displayName: displayName,
         photoURL: photoURL,
@@ -167,7 +169,7 @@ async function createFirebaseAccount(linkedinID, displayName, photoURL, email, a
   });
 
   await Promise.all([userCreationTask, databaseTask]);
-  const token = await admin.auth().createCustomToken(uid);
+  const token = await getAuth().createCustomToken(uid);
   functions.logger.log('Created Custom token for UID "', uid, '" Token:', token);
   return token;
 }
diff --git a/Node-1st-gen/message-translation/functions/index.js b/Node-1st-gen/message-translation/functions/index.js
index 65d1957794..64d4dafce9 100644
--- a/Node-1st-gen/message-translation/functions/index.js
+++ b/Node-1st-gen/message-translation/functions/index.js
@@ -16,8 +16,9 @@
 'use strict';
 
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getDatabase } = require('firebase-admin/database');
+initializeApp();
 const { TranslationServiceClient } = require('@google-cloud/translate');
 
 const translate = new TranslationServiceClient();
@@ -42,7 +43,7 @@ exports.translate = functions.database.ref('/messages/{languageID}/{messageID}')
               sourceLanguageCode: context.params.languageID, 
               targetLanguageCode: language 
             });
-            return admin.database().ref(`/messages/${language}/${snapshot.key}`).set({
+            return getDatabase().ref(`/messages/${language}/${snapshot.key}`).set({
               message: results[0],
               translated: true,
             });
diff --git a/Node-1st-gen/moderate-images/functions/index.js b/Node-1st-gen/moderate-images/functions/index.js
index 8639724824..c1ca69acd7 100644
--- a/Node-1st-gen/moderate-images/functions/index.js
+++ b/Node-1st-gen/moderate-images/functions/index.js
@@ -17,8 +17,9 @@
 
 // Firebase setup
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getStorage } = require('firebase-admin/storage');
+initializeApp();
 
 // Node.js core modules
 const fs = require('fs');
@@ -76,7 +77,7 @@ exports.blurOffensiveImages = functions.storage.object().onFinalize(async (objec
 async function blurImage(filePath, bucketName, metadata) {
   const tempLocalFile = path.join(os.tmpdir(), filePath);
   const tempLocalDir = path.dirname(tempLocalFile);
-  const bucket = admin.storage().bucket(bucketName);
+  const bucket = getStorage().bucket(bucketName);
 
   // Create the temp directory where the storage file will be downloaded.
   await mkdirp(tempLocalDir, { recursive: true });
diff --git a/Node-1st-gen/okta-auth/functions/index.js b/Node-1st-gen/okta-auth/functions/index.js
index 1a1d9e661d..4c55c6ad55 100644
--- a/Node-1st-gen/okta-auth/functions/index.js
+++ b/Node-1st-gen/okta-auth/functions/index.js
@@ -34,8 +34,9 @@ if (envCfg.parsed && envCfg.parsed.GOOGLE_APPLICATION_CREDENTIALS) {
 const functions = require('firebase-functions/v1');
 const {onInit} = require('firebase-functions/v1/init');
 const {defineString} = require('firebase-functions/params');
-const firebaseAdmin = require('firebase-admin');
-const firebaseApp = firebaseAdmin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getAuth } = require('firebase-admin/auth');
+initializeApp();
 
 const oktaOrgUrl = defineString('OKTA_ORG_URL');
 const OktaJwtVerifier = require('@okta/jwt-verifier');
@@ -85,7 +86,7 @@ app.get('/firebaseCustomToken', [cors, oktaAuth], async (req, res) => {
     const oktaUid = req.jwt.claims.uid;
     try {
         const firebaseToken =
-                await firebaseApp.auth().createCustomToken(oktaUid);
+                await getAuth().createCustomToken(oktaUid);
         res.send(firebaseToken);
     } catch (err) {
         functions.logger.error('Error minting token.', err);
diff --git a/Node-1st-gen/paypal/functions/index.js b/Node-1st-gen/paypal/functions/index.js
index 087fb86fdd..2989d92662 100644
--- a/Node-1st-gen/paypal/functions/index.js
+++ b/Node-1st-gen/paypal/functions/index.js
@@ -20,8 +20,9 @@ const {onInit} = require('firebase-functions/v1/init');
 const {defineSecret} = require('firebase-functions/params');
 const paypal = require('paypal-rest-sdk');
 // firebase-admin SDK init
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getDatabase } = require('firebase-admin/database');
+initializeApp();
 
 const paypalClientId = defineSecret('PAYPAL_CLIENT_ID');
 const paypalClientSecret = defineSecret('PAYPAL_CLIENT_SECRET');
@@ -112,7 +113,7 @@ exports.process = functions.runWith({secrets: [paypalClientId, paypalClientSecre
         // set paid status to True in RealTime Database
         const date = Date.now();
         const uid = payment.transactions[0].description;
-        const ref = admin.database().ref('users/' + uid + '/');
+        const ref = getDatabase().ref('users/' + uid + '/');
         ref.push({
           paid: true,
           // 'description': description,
diff --git a/Node-1st-gen/presence-firestore/functions/index.js b/Node-1st-gen/presence-firestore/functions/index.js
index f91e958640..6b16d56b1b 100644
--- a/Node-1st-gen/presence-firestore/functions/index.js
+++ b/Node-1st-gen/presence-firestore/functions/index.js
@@ -16,13 +16,14 @@
 
 // [START presence_sync_function]
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getFirestore } = require('firebase-admin/firestore');
+initializeApp();
 
 // Since this code will be running in the Cloud Functions environment
 // we call initialize Firestore without any arguments because it
 // detects authentication from the environment.
-const firestore = admin.firestore();
+const firestore = getFirestore();
 
 // Create a new function which is triggered on changes to /status/{uid}
 // Note: This is a Realtime Database trigger, *not* Firestore.
diff --git a/Node-1st-gen/publish-model/functions/index.js b/Node-1st-gen/publish-model/functions/index.js
index cd3e6d7bd2..6baac01e5c 100644
--- a/Node-1st-gen/publish-model/functions/index.js
+++ b/Node-1st-gen/publish-model/functions/index.js
@@ -16,10 +16,11 @@
 'use strict';
 
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getMachineLearning } = require('firebase-admin/machine-learning');
+initializeApp();
 
-const ml = admin.machineLearning();
+const ml = getMachineLearning();
 const path = require('path');
 
 /**
diff --git a/Node-1st-gen/quickstarts/auth-blocking-functions/functions/index.js b/Node-1st-gen/quickstarts/auth-blocking-functions/functions/index.js
index d8deda2ba5..566cd4e62e 100644
--- a/Node-1st-gen/quickstarts/auth-blocking-functions/functions/index.js
+++ b/Node-1st-gen/quickstarts/auth-blocking-functions/functions/index.js
@@ -15,10 +15,11 @@
  */
 
 const {functions} = require("firebase-functions/v1");
-const {admin} = require("firebase-admin");
+const { initializeApp } = require("firebase-admin/app");
+const { getFirestore } = require("firebase-admin/firestore");
 
-admin.initializeApp();
-const db = admin.firestore();
+initializeApp();
+const db = getFirestore();
 
 // [START v1ValidateNewUser]
 // [START v1beforeCreateFunctionTrigger]
diff --git a/Node-1st-gen/quickstarts/taskqueues-backup-images/functions/index.js b/Node-1st-gen/quickstarts/taskqueues-backup-images/functions/index.js
index 99a1c5129d..6b241cef9a 100644
--- a/Node-1st-gen/quickstarts/taskqueues-backup-images/functions/index.js
+++ b/Node-1st-gen/quickstarts/taskqueues-backup-images/functions/index.js
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 "use strict";
+const {URL, URLSearchParams} = require("node:url");
 const path = require("path");
 const functions = require('firebase-functions/v1');
 const {initializeApp} = require("firebase-admin/app");
@@ -54,9 +55,11 @@ exports.backupApod = functions
       }
 
       logger.info(`Requesting data from apod api for date ${date}`);
-      let url = "https://api.nasa.gov/planetary/apod";
-      url += `?date=${date}`;
-      url += `&api_key=${process.env.NASA_API_KEY}`;
+      const url = new URL("https://api.nasa.gov/planetary/apod");
+      url.search = new URLSearchParams({
+        date,
+        api_key: process.env.NASA_API_KEY || "",
+      }).toString();
       const apiResp = await fetch(url);
       if (!apiResp.ok) {
         logger.warn(
diff --git a/Node-1st-gen/quickstarts/thumbnails/functions/index.js b/Node-1st-gen/quickstarts/thumbnails/functions/index.js
index 0a3f73970d..d4f71c1b7e 100644
--- a/Node-1st-gen/quickstarts/thumbnails/functions/index.js
+++ b/Node-1st-gen/quickstarts/thumbnails/functions/index.js
@@ -17,12 +17,13 @@
 
 // [START import]
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
-admin.initializeApp()
+const { initializeApp } = require('firebase-admin/app');
+const { getStorage } = require('firebase-admin/storage');
+initializeApp();
 const path = require('path');
 
 //library for resizing images
-const sharp = require('sharp');
+const sharp = /** @type {import('sharp').SharpConstructor} */ (/** @type {unknown} */ (require('sharp')));
 // [END import]
 
 // [START generateThumbnail]
@@ -55,7 +56,7 @@ exports.firstGenGenerateThumbnail = functions.storage.object().onFinalize(async
 
   // [START thumbnailGeneration]
   // Download file from bucket.
-  const bucket = admin.storage().bucket(fileBucket);
+  const bucket = getStorage().bucket(fileBucket);
   const metadata = {
     contentType: contentType,
   };
diff --git a/Node-1st-gen/quickstarts/uppercase-firestore/functions/index.js b/Node-1st-gen/quickstarts/uppercase-firestore/functions/index.js
index c5033d399e..7282699d87 100644
--- a/Node-1st-gen/quickstarts/uppercase-firestore/functions/index.js
+++ b/Node-1st-gen/quickstarts/uppercase-firestore/functions/index.js
@@ -21,8 +21,9 @@
 const functions = require('firebase-functions/v1');
 
 // The Firebase Admin SDK to access Firestore.
-const admin = require("firebase-admin");
-admin.initializeApp();
+const { initializeApp } = require("firebase-admin/app");
+const { getFirestore } = require("firebase-admin/firestore");
+initializeApp();
 // [END import]
 
 // [START addMessage]
@@ -35,8 +36,7 @@ exports.addMessage = functions.https.onRequest(async (req, res) => {
   const original = req.query.text;
   // [START adminSdkAdd]
   // Push the new message into Firestore using the Firebase Admin SDK.
-  const writeResult = await admin
-    .firestore()
+  const writeResult = await getFirestore()
     .collection("messages")
     .add({ original: original });
   // Send back a message that we've successfully written the message
diff --git a/Node-1st-gen/remote-config-diff/functions/index.js b/Node-1st-gen/remote-config-diff/functions/index.js
index ef8e1c3d01..4d73139ecd 100644
--- a/Node-1st-gen/remote-config-diff/functions/index.js
+++ b/Node-1st-gen/remote-config-diff/functions/index.js
@@ -15,14 +15,14 @@
  */
 
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
+const { initializeApp, applicationDefault } = require('firebase-admin/app');
 const jsonDiff = require('json-diff');
 
-admin.initializeApp();
+initializeApp();
 
 // [START remote_config_function]
 exports.showConfigDiff = functions.remoteConfig.onUpdate(versionMetadata => {
-  return admin.credential.applicationDefault().getAccessToken()
+  return applicationDefault().getAccessToken()
     .then(accessTokenObj => {
       return accessTokenObj.access_token;
     })
diff --git a/Node-1st-gen/spotify-auth/functions/index.js b/Node-1st-gen/spotify-auth/functions/index.js
index 5275c4f991..a4e540b707 100644
--- a/Node-1st-gen/spotify-auth/functions/index.js
+++ b/Node-1st-gen/spotify-auth/functions/index.js
@@ -22,11 +22,13 @@ const cookieParser = require('cookie-parser');
 const crypto = require('node:crypto');
 
 // Firebase Setup
-const admin = require('firebase-admin');
+const { initializeApp, cert } = require('firebase-admin/app');
+const { getDatabase } = require('firebase-admin/database');
+const { getAuth } = require('firebase-admin/auth');
 // @ts-ignore
 const serviceAccount = require('./service-account.json');
-admin.initializeApp({
-  credential: admin.credential.cert(serviceAccount),
+initializeApp({
+  credential: cert(serviceAccount),
   databaseURL: `https://${process.env.GCLOUD_PROJECT}.firebaseio.com`,
 });
 
@@ -130,10 +132,10 @@ async function createFirebaseAccount(spotifyID, displayName, photoURL, email, ac
   const uid = `spotify:${spotifyID}`;
 
   // Save the access token to the Firebase Realtime Database.
-  const databaseTask = admin.database().ref(`/spotifyAccessToken/${uid}`).set(accessToken);
+  const databaseTask = getDatabase().ref(`/spotifyAccessToken/${uid}`).set(accessToken);
 
   // Create or update the user account.
-  const userCreationTask = admin.auth().updateUser(uid, {
+  const userCreationTask = getAuth().updateUser(uid, {
     displayName: displayName,
     photoURL: photoURL,
     email: email,
@@ -141,7 +143,7 @@ async function createFirebaseAccount(spotifyID, displayName, photoURL, email, ac
   }).catch((error) => {
     // If user does not exists we create it.
     if (error.code === 'auth/user-not-found') {
-      return admin.auth().createUser({
+      return getAuth().createUser({
         uid: uid,
         displayName: displayName,
         photoURL: photoURL,
@@ -155,7 +157,7 @@ async function createFirebaseAccount(spotifyID, displayName, photoURL, email, ac
   // Wait for all async tasks to complete, then generate and return a custom auth token.
   await Promise.all([userCreationTask, databaseTask]);
   // Create a Firebase custom auth token.
-  const token = await admin.auth().createCustomToken(uid);
+  const token = await getAuth().createCustomToken(uid);
   functions.logger.log(
     'Created Custom token for UID "',
     uid,
diff --git a/Node-1st-gen/stripe/functions/index.js b/Node-1st-gen/stripe/functions/index.js
index f3eea58846..5f9616c919 100644
--- a/Node-1st-gen/stripe/functions/index.js
+++ b/Node-1st-gen/stripe/functions/index.js
@@ -18,20 +18,21 @@
 const functions = require('firebase-functions/v1');
 const {onInit} = require('firebase-functions/v1/init');
 const {defineSecret} = require('firebase-functions/params');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getFirestore } = require('firebase-admin/firestore');
+initializeApp();
 const { Logging } = require('@google-cloud/logging');
 const logging = new Logging({
   projectId: process.env.GCLOUD_PROJECT,
 });
 
-const { Stripe } = require('stripe');
+const Stripe = require('stripe');
 const stripeSecret = defineSecret('STRIPE_SECRET');
 
 let stripe;
 onInit(() => {
   stripe = new Stripe(stripeSecret.value(), {
-    apiVersion: '2020-08-27',
+    apiVersion: '2026-07-29.dahlia',
   });
 });
 
@@ -45,7 +46,7 @@ exports.createStripeCustomer = functions.runWith({secrets: [stripeSecret]}).auth
   const intent = await stripe.setupIntents.create({
     customer: customer.id,
   });
-  await admin.firestore().collection('stripe_customers').doc(user.uid).set({
+  await getFirestore().collection('stripe_customers').doc(user.uid).set({
     customer_id: customer.id,
     setup_secret: intent.client_secret,
   });
@@ -147,11 +148,11 @@ exports.confirmStripePayment = functions.runWith({secrets: [stripeSecret]}).fire
  * When a user deletes their account, clean up after them
  */
 exports.cleanupUser = functions.runWith({secrets: [stripeSecret]}).auth.user().onDelete(async (user) => {
-  const dbRef = admin.firestore().collection('stripe_customers');
+  const dbRef = getFirestore().collection('stripe_customers');
   const customer = (await dbRef.doc(user.uid).get()).data();
   await stripe.customers.del(customer.customer_id);
   // Delete the customers payments & payment methods in firestore.
-  const batch = admin.firestore().batch();
+  const batch = getFirestore().batch();
   const paymetsMethodsSnapshot = await dbRef
     .doc(user.uid)
     .collection('payment_methods')
diff --git a/Node-1st-gen/survey-app-update/functions/index.js b/Node-1st-gen/survey-app-update/functions/index.js
index 48f4f14ccb..d68941618d 100644
--- a/Node-1st-gen/survey-app-update/functions/index.js
+++ b/Node-1st-gen/survey-app-update/functions/index.js
@@ -18,8 +18,9 @@
 const functions = require('firebase-functions/v1');
 const {onInit} = require('firebase-functions/v1/init');
 const {defineString, defineSecret} = require('firebase-functions/params');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+const { getAuth } = require('firebase-admin/auth');
+initializeApp();
 const nodemailer = require('nodemailer');
 // Configure the email transport using the default SMTP transport and a GMail account.
 // For other types of transports such as Sendgrid see https://nodemailer.com/transports/
@@ -49,7 +50,7 @@ exports.sendAppUpdateSurvey = functions.runWith({secrets: [gmailPassword]}).anal
     // Fetch the email of the user. In this sample we assume that the app is using Firebase Auth and
     // has set the Firebase Analytics User ID to be the same as the Firebase Auth uid using the
     // setUserId API.
-    const user = await admin.auth().getUser(uid);
+    const user = await getAuth().getUser(uid);
     const email = user.email;
     const name = user.displayName;
     return sendSurveyEmail(email, name);
diff --git a/Node-1st-gen/template-handlebars/functions/firebaseUser.js b/Node-1st-gen/template-handlebars/functions/firebaseUser.js
index 6e44f88888..ff7484010e 100644
--- a/Node-1st-gen/template-handlebars/functions/firebaseUser.js
+++ b/Node-1st-gen/template-handlebars/functions/firebaseUser.js
@@ -15,7 +15,7 @@
  */
 'use strict';
 
-const admin = require('firebase-admin');
+const { getAuth } = require('firebase-admin/auth');
 const cookieParser = require('cookie-parser')();
 const functions = require('firebase-functions/v1');
 
@@ -61,7 +61,7 @@ function getIdTokenFromRequest(req, res) {
  */
 async function addDecodedIdTokenToRequest(idToken, req) {
   try {
-    const decodedIdToken = await admin.auth().verifyIdToken(idToken);
+    const decodedIdToken = await getAuth().verifyIdToken(idToken);
     req.user = decodedIdToken;
     functions.logger.log('ID Token correctly decoded', decodedIdToken);
   } catch (error) {
diff --git a/Node-1st-gen/template-handlebars/functions/index.js b/Node-1st-gen/template-handlebars/functions/index.js
index 56b26b9f68..aa89b33df1 100644
--- a/Node-1st-gen/template-handlebars/functions/index.js
+++ b/Node-1st-gen/template-handlebars/functions/index.js
@@ -16,8 +16,8 @@
 'use strict';
 
 const functions = require('firebase-functions/v1');
-const admin = require('firebase-admin');
-admin.initializeApp();
+const { initializeApp } = require('firebase-admin/app');
+initializeApp();
 
 const express = require('express');
 const { engine } = require('express-handlebars');
diff --git a/Node-1st-gen/text-moderation/functions/index.js b/Node-1st-gen/text-moderation/functions/index.js
index aef14e6d5b..8747e63bf7 100644
--- a/Node-1st-gen/text-moderation/functions/index.js
+++ b/Node-1st-gen/text-moderation/functions/index.js
@@ -16,7 +16,7 @@
 'use strict';
 
 const functions = require('firebase-functions/v1');
-const Filter = require('bad-words');
+const { Filter } = require('bad-words');
 const badWordsFilter = new Filter();
 
 // Moderates messages by lowering all uppercase messages and removing swearwords.
diff --git a/Node-1st-gen/username-password-auth/functions/index.js b/Node-1st-gen/username-password-auth/functions/index.js
index 0a38ddc613..ad0e30eae4 100644
--- a/Node-1st-gen/username-password-auth/functions/index.js
+++ b/Node-1st-gen/username-password-auth/functions/index.js
@@ -21,11 +21,12 @@ const functions = require('firebase-functions/v1');
 const cors = require('cors')({origin: true});
 
 // Firebase Setup
-const admin = require('firebase-admin');
+const { initializeApp, cert } = require('firebase-admin/app');
+const { getAuth } = require('firebase-admin/auth');
 // @ts-ignore
 const serviceAccount = require('./service-account.json');
-admin.initializeApp({
-  credential: admin.credential.cert(serviceAccount),
+initializeApp({
+  credential: cert(serviceAccount),
   databaseURL: `https://${process.env.GCLOUD_PROJECT}.firebaseio.com`,
 });
 
@@ -83,7 +84,7 @@ exports.auth = functions.https.onRequest((req, res) => {
       }
 
       // On success return the Firebase Custom Auth Token.
-      const firebaseToken = await admin.auth().createCustomToken(username);
+      const firebaseToken = await getAuth().createCustomToken(username);
       return handleResponse(username, 200, { token: firebaseToken });
     });
   } catch (error) {
diff --git a/Node-1st-gen/username-password-auth/public/main.js b/Node-1st-gen/username-password-auth/public/main.js
index fc8e01fd1e..d13f63ff05 100644
--- a/Node-1st-gen/username-password-auth/public/main.js
+++ b/Node-1st-gen/username-password-auth/public/main.js
@@ -83,7 +83,7 @@ Demo.prototype.signIn = function() {
   req.onerror = function() {
     err.innerText = 'Network error in Firebase Cloud Function call see developer console for details';
   };
-  var url = 'https://us-central1-' + getFirebaseProjectId() + '.cloudfunctions.net/auth';
+  var url = new URL(`https://us-central1-${getFirebaseProjectId()}.cloudfunctions.net/auth`);
   req.open('POST', url, true);
   req.setRequestHeader('Content-Type', 'application/json');
   req.send(JSON.stringify({
diff --git a/Node/app-distribution-feedback-to-jira/functions/index.js b/Node/app-distribution-feedback-to-jira/functions/index.js
index e477bf33c7..b1010e1c10 100644
--- a/Node/app-distribution-feedback-to-jira/functions/index.js
+++ b/Node/app-distribution-feedback-to-jira/functions/index.js
@@ -17,6 +17,7 @@
 import {
   onInAppFeedbackPublished} from "firebase-functions/alerts/appDistribution";
 import {defineInt, defineSecret, defineString} from "firebase-functions/params";
+import {URL, URLSearchParams} from "node:url";
 import logger from "firebase-functions/logger";
 import {FormData} from "formdata-polyfill/esm.min.js";
 
@@ -119,7 +120,8 @@ async function uploadScreenshot(issueUri, screenshotUri) {
 
   const form = new FormData();
   form.append("file", blob, "screenshot.png");
-  const ulResponse = await fetch(issueUri + "/attachments", {
+  const attachmentsUrl = new URL(`${issueUri}/attachments`);
+  const ulResponse = await fetch(attachmentsUrl, {
     method: "POST",
     body: form,
     headers: {
@@ -139,15 +141,17 @@ async function uploadScreenshot(issueUri, screenshotUri) {
  * @param {string} testerEmail Email address of tester who filed feedback
  */
 async function lookupReporter(testerEmail) {
-  const response =
-        await fetch(
-            `${jiraUriConfig.value()}/rest/api/3/user/search` +
-              `?query=${testerEmail}`, {
-              method: "GET",
-              headers: {
-                "Authorization": authHeader(),
-                "Accept": "application/json",
-              }});
+  const searchUrl = new URL(
+      `${jiraUriConfig.value()}/rest/api/3/user/search`,
+  );
+  searchUrl.search = new URLSearchParams({query: testerEmail}).toString();
+  const response = await fetch(searchUrl, {
+    method: "GET",
+    headers: {
+      "Authorization": authHeader(),
+      "Accept": "application/json",
+    },
+  });
   if (!response.ok) {
     logger.info(`Failed to find Jira user for '${testerEmail}':` +
                 `${response.status} ${response.statusText}`);
diff --git a/Node/delete-unused-accounts-cron/functions/index.js b/Node/delete-unused-accounts-cron/functions/index.js
index 837735a065..e808df7f8a 100644
--- a/Node/delete-unused-accounts-cron/functions/index.js
+++ b/Node/delete-unused-accounts-cron/functions/index.js
@@ -22,8 +22,9 @@ const {onSchedule} = require("firebase-functions/scheduler");
 const {logger} = require("firebase-functions");
 
 // The Firebase Admin SDK to delete inactive users.
-const admin = require("firebase-admin");
-admin.initializeApp();
+const {initializeApp} = require("firebase-admin/app");
+const {getAuth} = require("firebase-admin/auth");
+initializeApp();
 
 // The es6-promise-pool to limit the concurrency of promises.
 const PromisePool = require("es6-promise-pool").default;
@@ -52,7 +53,7 @@ exports.accountcleanup = onSchedule("every day 00:00", async (event) => {
 // [START deleteInactiveUser]
 /**
  * Deletes one inactive user from the list.
- * @param {admin.auth.UserRecord[]} inactiveUsers
+ * @param {import("firebase-admin/auth").UserRecord[]} inactiveUsers
  * @return {null | Promise<void>}
  */
 function deleteInactiveUser(inactiveUsers) {
@@ -60,7 +61,7 @@ function deleteInactiveUser(inactiveUsers) {
     const userToDelete = inactiveUsers.pop();
 
     // Delete the inactive user.
-    return admin.auth().deleteUser(userToDelete.uid).then(() => {
+    return getAuth().deleteUser(userToDelete.uid).then(() => {
       return logger.log(
           "Deleted user account",
           userToDelete.uid,
@@ -84,12 +85,12 @@ function deleteInactiveUser(inactiveUsers) {
 // Returns the list of all inactive users.
 /**
  *
- * @param {admin.auth.UserRecord[]} [users] the current list of inactive users
+ * @param {import("firebase-admin/auth").UserRecord[]} [users] the current list of inactive users
  * @param {string} [nextPageToken]
- * @return {Promise<admin.auth.UserRecord[]>}
+ * @return {Promise<import("firebase-admin/auth").UserRecord[]>}
  */
 async function getInactiveUsers(users = [], nextPageToken) {
-  const result = await admin.auth().listUsers(1000, nextPageToken);
+  const result = await getAuth().listUsers(1000, nextPageToken);
   // Find users that have not signed in in the last 30 days.
   const inactiveUsers = result.users.filter(
       (user) =>
diff --git a/Node/instrument-with-opentelemetry/functions/index.js b/Node/instrument-with-opentelemetry/functions/index.js
index b978fbefc9..a2213b545f 100644
--- a/Node/instrument-with-opentelemetry/functions/index.js
+++ b/Node/instrument-with-opentelemetry/functions/index.js
@@ -26,9 +26,10 @@ const db = getFirestore();
 
 /**
  * Divide an array into chunks of `chunkSize`
- * @param {any[]} arr
- * @param {Number} chunkSize
- * @return {Array<Array<any>>}
+ * @template T
+ * @param {T[]} arr
+ * @param {number} chunkSize
+ * @return {T[][]}
  */
 function sliceIntoChunks(arr, chunkSize) {
   const res = [];
diff --git a/Node/quickstarts/thumbnails/functions/index.js b/Node/quickstarts/thumbnails/functions/index.js
index d657dddd2b..34052f042a 100644
--- a/Node/quickstarts/thumbnails/functions/index.js
+++ b/Node/quickstarts/thumbnails/functions/index.js
@@ -27,7 +27,7 @@ const logger = require("firebase-functions/logger");
 const path = require("path");
 
 // library for image resizing
-const sharp = require("sharp");
+const sharp = /** @type {import('sharp').SharpConstructor} */ (/** @type {unknown} */ (require("sharp")));
 
 initializeApp();
 // [END v2storageAdditionalImports]
diff --git a/Node/remote-config-diff/functions/index.js b/Node/remote-config-diff/functions/index.js
index 7db0dbe59f..0853b6af8a 100644
--- a/Node/remote-config-diff/functions/index.js
+++ b/Node/remote-config-diff/functions/index.js
@@ -17,12 +17,13 @@
 
 // [START all]
 // [START import]
+const {URL, URLSearchParams} = require("node:url");
 // The Cloud Functions for Firebase SDK to set up triggers and logging.
 const {onConfigUpdated} = require("firebase-functions/remoteConfig");
 const logger = require("firebase-functions/logger");
 // The Firebase Admin SDK to obtain access tokens.
-const admin = require("firebase-admin");
-const app = admin.initializeApp();
+const {initializeApp, applicationDefault} = require("firebase-admin/app");
+initializeApp();
 const jsonDiff = require("json-diff");
 // [END import]
 
@@ -30,13 +31,14 @@ const jsonDiff = require("json-diff");
 exports.showconfigdiff = onConfigUpdated(async (event) => {
   try {
     // Obtain the access token from the Admin SDK
-    const accessTokenObj = await admin.credential.applicationDefault()
+    const accessTokenObj = await applicationDefault()
         .getAccessToken();
     const accessToken = accessTokenObj.access_token;
 
     // Get the version number from the event object
-    const remoteConfigApi = "https://firebaseremoteconfig.googleapis.com/v1/" +
-        `projects/${app.options.projectId}/remoteConfig`;
+    const remoteConfigApi = new URL(
+        `https://firebaseremoteconfig.googleapis.com/v1/projects/${process.env.GCLOUD_PROJECT}/remoteConfig`,
+    );
     const currentVersion = event.data.versionNumber;
     const prevVersion = currentVersion - 1;
     const templatePromises = [];
diff --git a/Node/taskqueues-backup-images/functions/index.js b/Node/taskqueues-backup-images/functions/index.js
index 6254b1d5cf..b058c7c5b5 100644
--- a/Node/taskqueues-backup-images/functions/index.js
+++ b/Node/taskqueues-backup-images/functions/index.js
@@ -22,6 +22,7 @@ const {getFunctions} = require("firebase-admin/functions");
 const {logger} = require("firebase-functions");
 
 // Dependencies for image backup.
+const {URL, URLSearchParams} = require("node:url");
 const path = require("path");
 const {initializeApp} = require("firebase-admin/app");
 const {getStorage} = require("firebase-admin/storage");
@@ -59,9 +60,11 @@ exports.backupapod = onTaskDispatched(
         );
       }
       logger.info(`Requesting data from apod api for date ${date}`);
-      let url = "https://api.nasa.gov/planetary/apod";
-      url += `?date=${date}`;
-      url += `&api_key=${process.env.NASA_API_KEY}`;
+      const url = new URL("https://api.nasa.gov/planetary/apod");
+      url.search = new URLSearchParams({
+        date,
+        api_key: process.env.NASA_API_KEY || "",
+      }).toString();
       const apiResp = await fetch(url);
       if (!apiResp.ok) {
         logger.warn(
@@ -115,11 +118,12 @@ async function getFunctionUrl(name, location="us-central1") {
     });
   }
   const projectId = await auth.getProjectId();
-  const url = "https://cloudfunctions.googleapis.com/v2beta/" +
-    `projects/${projectId}/locations/${location}/functions/${name}`;
+  const url = new URL(
+      `https://cloudfunctions.googleapis.com/v2beta/projects/${projectId}/locations/${location}/functions/${name}`,
+  );
 
   const client = await auth.getClient();
-  const res = await client.request({url});
+  const res = await client.request({url: url.toString()});
   const uri = res.data?.serviceConfig?.uri;
   if (!uri) {
     throw new Error(`Unable to retreive uri for function at ${url}`);
diff --git a/Node/test-functions-mocha/functions/index.test.js b/Node/test-functions-mocha/functions/index.test.js
index e1e8db92e8..4da400068c 100644
--- a/Node/test-functions-mocha/functions/index.test.js
+++ b/Node/test-functions-mocha/functions/index.test.js
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+/// <reference types="mocha" />
+
 const {logger} = require("firebase-functions");
 const test = require("firebase-functions-test");
 const {spy} = require("sinon");
diff --git a/Node/youtube/functions/index.ts b/Node/youtube/functions/index.ts
index 152f06521e..89b8bdcfdc 100644
--- a/Node/youtube/functions/index.ts
+++ b/Node/youtube/functions/index.ts
@@ -16,7 +16,7 @@
 
 import { onCall, CallableRequest } from "firebase-functions/https";
 import { defineSecret } from "firebase-functions/params";
-import { google } from "googleapis";
+import { google, youtube_v3 } from "googleapis";
 
 const youtubeApiKey = defineSecret("YOUTUBE_API_KEY");
 
@@ -60,7 +60,7 @@ export const getChannelInfo = onCall({ secrets: [youtubeApiKey] }, async (reques
     channelTitle: channel.snippet!.title,
     channelDescription: channel.snippet!.description,
     subscriberCount: channel.statistics!.subscriberCount,
-    recentVideos: videos.map((video: any) => {
+    recentVideos: videos.map((video: youtube_v3.Schema$SearchResult) => {
       return {
         videoTitle: video.snippet!.title,
         videoUrl: `https://www.youtube.com/watch?v=${video.id!.videoId}`,
diff --git a/tsconfig.template.json b/tsconfig.template.json
index c896ff99fe..5f10ef387b 100644
--- a/tsconfig.template.json
+++ b/tsconfig.template.json
@@ -5,7 +5,7 @@
     "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
     "lib": ["es2022", "dom", "webworker"],              /* Specify library files to be included in the compilation. */
     "allowJs": true,                          /* Allow javascript files to be compiled. */
-    "checkJs": false,                         /* Report errors in .js files. */
+    "checkJs": true,                         /* Report errors in .js files. */
     "outDir": "./dist",                       /* Redirect output structure to the directory. */
     "noEmit": true,                           /* Do not emit outputs. */
     "resolveJsonModule": true,
@@ -29,7 +29,9 @@
     "noUnusedLocals": false,                /* Report errors on unused locals. */
     // "noUnusedParameters": true,            /* Report errors on unused parameters. */
     // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
-    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+    "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+    "allowUnreachableCode": false,         /* Report errors for unreachable code. */
+    "allowUnusedLabels": false,            /* Report errors for unused labels. */
 
     "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
     "forceConsistentCasingInFileNames": true  /* Disallow inconsistently-cased references to the same file. */