diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5536b8a..80b5486 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 ## Unreleased
 
+### Dependencies
+
+- Upgrade `@modelcontextprotocol/sdk` from 1.25.3 to 1.26.0
+- Regenerated SDK patch for version 1.26.0
+
 ### Documentation
 
 - **PR Guidelines**: Added CHANGELOG requirement to CLAUDE.md (#112)
diff --git a/package-lock.json b/package-lock.json
index 52ebf1f..e14f200 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "license": "MIT",
       "dependencies": {
         "@mcp-ui/server": "^5.13.1",
-        "@modelcontextprotocol/sdk": "^1.25.3",
+        "@modelcontextprotocol/sdk": "^1.26.0",
         "@opentelemetry/api": "^1.9.0",
         "@opentelemetry/auto-instrumentations-node": "^0.56.0",
         "@opentelemetry/exporter-trace-otlp-http": "^0.56.0",
@@ -1914,9 +1914,9 @@
       }
     },
     "node_modules/@modelcontextprotocol/sdk": {
-      "version": "1.25.3",
-      "resolved": "https://registry.npmjs.org/@modelcontextprotocol/sdk/-/sdk-1.25.3.tgz",
-      "integrity": "sha512-vsAMBMERybvYgKbg/l4L1rhS7VXV1c0CtyJg72vwxONVX0l4ZfKVAnZEWTQixJGTzKnELjQ59e4NbdFDALRiAQ==",
+      "version": "1.26.0",
+      "resolved": "https://registry.npmjs.org/@modelcontextprotocol/sdk/-/sdk-1.26.0.tgz",
+      "integrity": "sha512-Y5RmPncpiDtTXDbLKswIJzTqu2hyBKxTNsgKqKclDbhIgg1wgtf1fRuvxgTnRfcnxtvvgbIEcqUOzZrJ6iSReg==",
       "license": "MIT",
       "dependencies": {
         "@hono/node-server": "^1.19.9",
@@ -1927,14 +1927,15 @@
         "cross-spawn": "^7.0.5",
         "eventsource": "^3.0.2",
         "eventsource-parser": "^3.0.0",
-        "express": "^5.0.1",
-        "express-rate-limit": "^7.5.0",
-        "jose": "^6.1.1",
+        "express": "^5.2.1",
+        "express-rate-limit": "^8.2.1",
+        "hono": "^4.11.4",
+        "jose": "^6.1.3",
         "json-schema-typed": "^8.0.2",
         "pkce-challenge": "^5.0.0",
         "raw-body": "^3.0.0",
         "zod": "^3.25 || ^4.0",
-        "zod-to-json-schema": "^3.25.0"
+        "zod-to-json-schema": "^3.25.1"
       },
       "engines": {
         "node": ">=18"
@@ -9139,9 +9140,9 @@
       }
     },
     "node_modules/body-parser": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-2.2.1.tgz",
-      "integrity": "sha512-nfDwkulwiZYQIGwxdy0RUmowMhKcFVcYXUU7m4QlKYim1rUtg83xm2yjZ40QjDuc291AJjjeSc9b++AWHSgSHw==",
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-2.2.2.tgz",
+      "integrity": "sha512-oP5VkATKlNwcgvxi0vM0p/D3n2C3EReYVX+DNYs5TjZFn/oQt2j+4sVJtSMr18pdRr8wjTcBl6LoV+FUwzPmNA==",
       "license": "MIT",
       "dependencies": {
         "bytes": "^3.1.2",
@@ -9150,7 +9151,7 @@
         "http-errors": "^2.0.0",
         "iconv-lite": "^0.7.0",
         "on-finished": "^2.4.1",
-        "qs": "^6.14.0",
+        "qs": "^6.14.1",
         "raw-body": "^3.0.1",
         "type-is": "^2.0.1"
       },
@@ -10815,10 +10816,13 @@
       }
     },
     "node_modules/express-rate-limit": {
-      "version": "7.5.1",
-      "resolved": "https://registry.npmjs.org/express-rate-limit/-/express-rate-limit-7.5.1.tgz",
-      "integrity": "sha512-7iN8iPMDzOMHPUYllBEsQdWVB6fPDMPqwjBaFrgr4Jgr/+okjvzAy+UHlYYL/Vs0OsOrMkwS6PJDkFlJwoxUnw==",
+      "version": "8.2.1",
+      "resolved": "https://registry.npmjs.org/express-rate-limit/-/express-rate-limit-8.2.1.tgz",
+      "integrity": "sha512-PCZEIEIxqwhzw4KF0n7QF4QqruVTcF73O5kFKUnGOyjbCCgizBBiFaYpd/fnBLUMPw/BWw9OsiN7GgrNYr7j6g==",
       "license": "MIT",
+      "dependencies": {
+        "ip-address": "10.0.1"
+      },
       "engines": {
         "node": ">= 16"
       },
@@ -11533,7 +11537,6 @@
       "resolved": "https://registry.npmjs.org/hono/-/hono-4.11.7.tgz",
       "integrity": "sha512-l7qMiNee7t82bH3SeyUCt9UF15EVmaBvsppY2zQtrbIhl/yzBTny+YUxsVjSjQ6gaqaeVtZmGocom8TzBlA4Yw==",
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=16.9.0"
       }
@@ -11859,6 +11862,15 @@
         "node": ">=10.13.0"
       }
     },
+    "node_modules/ip-address": {
+      "version": "10.0.1",
+      "resolved": "https://registry.npmjs.org/ip-address/-/ip-address-10.0.1.tgz",
+      "integrity": "sha512-NWv9YLW4PoW2B7xtzaS3NCot75m6nK7Icdv0o3lfMceJVRfSoQwqD4wEH5rLwoKJwUiZ/rfpiVBhnaF0FK4HoA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 12"
+      }
+    },
     "node_modules/ipaddr.js": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
@@ -13674,9 +13686,9 @@
       }
     },
     "node_modules/qs": {
-      "version": "6.14.1",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.14.1.tgz",
-      "integrity": "sha512-4EK3+xJl8Ts67nLYNwqw/dsFVnCf+qR7RgXSK9jEEm9unao3njwMDdmsdvoKBKHzxd7tCYz5e5M+SnMjdtXGQQ==",
+      "version": "6.15.0",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.15.0.tgz",
+      "integrity": "sha512-mAZTtNCeetKMH+pSjrb76NAM8V9a05I9aBZOHztWy/UqcJdQYNsf59vrRKWnojAT9Y+GbIvoTBC++CPHqpDBhQ==",
       "license": "BSD-3-Clause",
       "dependencies": {
         "side-channel": "^1.1.0"
diff --git a/package.json b/package.json
index 3fbe28e..6d2b02d 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
   ],
   "dependencies": {
     "@mcp-ui/server": "^5.13.1",
-    "@modelcontextprotocol/sdk": "^1.25.3",
+    "@modelcontextprotocol/sdk": "^1.26.0",
     "@opentelemetry/api": "^1.9.0",
     "@opentelemetry/auto-instrumentations-node": "^0.56.0",
     "@opentelemetry/exporter-trace-otlp-http": "^0.56.0",
diff --git a/patches/@modelcontextprotocol+sdk+1.25.3.patch b/patches/@modelcontextprotocol+sdk+1.26.0.patch
similarity index 100%
rename from patches/@modelcontextprotocol+sdk+1.25.3.patch
rename to patches/@modelcontextprotocol+sdk+1.26.0.patch