diff --git a/docs-site/docusaurus.config.ts b/docs-site/docusaurus.config.ts
index 125c73e45f..91f8b32c06 100644
--- a/docs-site/docusaurus.config.ts
+++ b/docs-site/docusaurus.config.ts
@@ -31,6 +31,12 @@ const versions: string[] = rawVersions
 const lastVersion = versions[0]
 const hasVersions = lastVersion !== undefined
 
+// Building every minor's full doc set on every release OOMs — cap the live site
+// to the most recent minors. Older minors' markdown still lives in the GitHub repo and
+// is served, unversioned, from the corresponding tag.
+const MAX_BUILT_VERSIONS = 5
+const builtVersions = versions.slice(0, MAX_BUILT_VERSIONS)
+
 const config: Config = {
   title: 'Gusto Embedded',
   tagline: 'Embedded Payroll React SDK Documentation',
@@ -206,8 +212,9 @@ const config: Config = {
           ...(hasVersions && {
             lastVersion,
             includeCurrentVersion: false,
+            onlyIncludeVersions: builtVersions,
             versions: Object.fromEntries(
-              versions.map(version => [version, { banner: 'none' as const, badge: false }]),
+              builtVersions.map(version => [version, { banner: 'none' as const, badge: false }]),
             ),
           }),
         },
@@ -216,9 +223,9 @@ const config: Config = {
           // robots.txt blocks crawlers from fetching older-minor snapshots; keep
           // them out of the sitemap too, so it advertises only the canonical,
           // unprefixed /docs/<page> (the latest minor, driven by lastVersion).
-          // versions[0] is that latest minor served unprefixed, so slice(1) drops
-          // just the /docs/<X.Y>/ snapshots — no maintenance as new minors land.
-          ignorePatterns: hasVersions ? versions.slice(1).map(v => `/docs/${v}/**`) : [],
+          // builtVersions[0] is that latest minor served unprefixed, so slice(1)
+          // drops just the /docs/<X.Y>/ snapshots — no maintenance as new minors land.
+          ignorePatterns: hasVersions ? builtVersions.slice(1).map(v => `/docs/${v}/**`) : [],
           changefreq: 'weekly',
           priority: 0.5,
         },
diff --git a/docs-site/src/theme/NotFound/Content/index.tsx b/docs-site/src/theme/NotFound/Content/index.tsx
index 2ba3141aa8..34b4ae8d8f 100644
--- a/docs-site/src/theme/NotFound/Content/index.tsx
+++ b/docs-site/src/theme/NotFound/Content/index.tsx
@@ -1,11 +1,19 @@
 import Link from '@docusaurus/Link'
+import { useLocation } from '@docusaurus/router'
 import useBaseUrl from '@docusaurus/useBaseUrl'
 import Heading from '@theme/Heading'
 import type { ReactNode } from 'react'
 import styles from './styles.module.css'
 
+// Only the most recent minors are built into the live site (SDK-1344); older
+// /docs/<X.Y>/ paths 404 here. Point readers at the git tag with the same
+// content instead of leaving them stranded.
+const OLD_VERSION_PATH = /^\/docs\/(\d+\.\d+)\//
+
 export default function NotFoundContent(): ReactNode {
   const homeUrl = useBaseUrl('/')
+  const { pathname } = useLocation()
+  const oldVersionMatch = OLD_VERSION_PATH.exec(pathname)
 
   return (
     <div className={styles.root}>
@@ -16,6 +24,18 @@ export default function NotFoundContent(): ReactNode {
         <p className={styles.subtitle}>
           The page you&apos;re looking for doesn&apos;t exist or has been moved.
         </p>
+        {oldVersionMatch && (
+          <p className={styles.subtitle}>
+            Looking for SDK {oldVersionMatch[1]} docs? Older versions aren&apos;t published on this
+            site, but the source is preserved at{' '}
+            <a
+              href={`https://github.com/Gusto/embedded-react-sdk/tree/v${oldVersionMatch[1]}.0/docs`}
+            >
+              v{oldVersionMatch[1]}.0/docs
+            </a>{' '}
+            in Gusto/embedded-react-sdk.
+          </p>
+        )}
         <div className={styles.links}>
           <Link to={homeUrl} className={styles.homeLink}>
             Go to Home