diff --git a/.changeset/node-22-support.md b/.changeset/node-22-support.md
new file mode 100644
index 0000000..19120f7
--- /dev/null
+++ b/.changeset/node-22-support.md
@@ -0,0 +1,8 @@
+---
+'@seamless-auth/core': patch
+'@seamless-auth/express': patch
+'@seamless-auth/fastify': patch
+'@seamless-auth/nextjs': patch
+---
+
+Support Node 22 and newer. The `engines` field now requires `>=22` instead of `>=24 <25`, and CI runs on Node 22, 24, and the latest release (fells-code/seamless-auth-api#339).
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f0e2e54..7efce16 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,9 +8,16 @@ on:
 
 jobs:
   test:
-    name: Run Tests
+    name: Run Tests (Node ${{ matrix.node-version }})
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+      matrix:
+        # The supported range is engines >=22: the oldest supported LTS, the
+        # development default from .nvmrc, and the newest release.
+        node-version: [22, 24, latest]
+
     steps:
       - uses: actions/checkout@v4
 
@@ -20,7 +27,7 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version-file: '.nvmrc'
+          node-version: ${{ matrix.node-version }}
           cache: pnpm
 
       - name: Install dependencies
diff --git a/AGENTS.md b/AGENTS.md
index 0506b45..19c7c73 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -106,8 +106,9 @@ packages/
 | Build   | `pnpm build`   |
 | Test    | `pnpm test`    |
 
-- Node version is pinned by `.nvmrc` (Node 24); CI reads it via
-  `node-version-file`. Run `nvm use` and `corepack enable` locally to match.
+- Supported Node is `>=22`. CI tests 22, 24, and the latest release;
+  `.nvmrc` pins Node 24 for development and releases. Run `nvm use` and
+  `corepack enable` locally.
 - Releases use Changesets; a user-facing change needs a changeset. Do not
   hand-edit versions or `CHANGELOG.md`.
 
diff --git a/package.json b/package.json
index f980ab7..04d86c4 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "private": true,
   "packageManager": "pnpm@10.33.0",
   "engines": {
-    "node": ">=24 <25"
+    "node": ">=22"
   },
   "scripts": {
     "build": "pnpm -r --sort build",
diff --git a/packages/core/package.json b/packages/core/package.json
index 27f7703..8d63035 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -41,7 +41,7 @@
         "README.md"
     ],
     "engines": {
-        "node": ">=24 <25"
+        "node": ">=22"
     },
     "scripts": {
         "build": "tsc -p tsconfig.json",
diff --git a/packages/express/package.json b/packages/express/package.json
index 34cc68b..618683b 100644
--- a/packages/express/package.json
+++ b/packages/express/package.json
@@ -30,7 +30,7 @@
     }
   },
   "engines": {
-    "node": ">=24 <25"
+    "node": ">=22"
   },
   "scripts": {
     "build": "pnpm run build:js && pnpm run build:types",
diff --git a/packages/fastify/package.json b/packages/fastify/package.json
index 148f439..4320731 100644
--- a/packages/fastify/package.json
+++ b/packages/fastify/package.json
@@ -30,7 +30,7 @@
     }
   },
   "engines": {
-    "node": ">=24 <25"
+    "node": ">=22"
   },
   "scripts": {
     "build": "pnpm run build:js && pnpm run build:types",
diff --git a/packages/nextjs/package.json b/packages/nextjs/package.json
index 353714e..38c2f91 100644
--- a/packages/nextjs/package.json
+++ b/packages/nextjs/package.json
@@ -31,7 +31,7 @@
     }
   },
   "engines": {
-    "node": ">=24 <25"
+    "node": ">=22"
   },
   "scripts": {
     "build": "pnpm run build:js && pnpm run build:types",