diff --git a/.node-version b/.node-version
new file mode 100644
index 00000000..ca5c3500
--- /dev/null
+++ b/.node-version
@@ -0,0 +1 @@
+24.18.0
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b59a849d..2a26637a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -119,6 +119,15 @@ For new locales, update:
 
 ## Recommended Checks
 
+Use the Node.js version in `.node-version` for local and Cloudflare builds.
+Cloudflare Pages and Workers Builds read this file automatically. If a project
+sets `NODE_VERSION` in its dashboard, keep it aligned with this file.
+
+When regenerating the lockfile, use a directory without `node_modules` and
+verify `npm ci` with npm 10.9.2, the version used by Cloudflare's build image.
+Include optional dependencies so the lockfile also covers native and WASM
+dependencies on other platforms.
+
 For most backend or shared changes:
 
 ```sh
diff --git a/package-lock.json b/package-lock.json
index 80270f3b..eecde476 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,6 +31,9 @@
         "typescript": "^6.0.3",
         "vite": "^8.1.3",
         "wrangler": "^4.105.0"
+      },
+      "engines": {
+        "node": "^22.19.0 || >=24.11.0"
       }
     },
     "node_modules/@babel/code-frame": {
@@ -64,7 +67,6 @@
       "integrity": "sha512-5FgxM4dLQpMJHSiVATk8foW263dVHQHBVpXYiimNECVWG01f4nFyEbQixeT6Mwvg7TayREJ2gpKl3o2RoMdnqw==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@babel/code-frame": "^8.0.0",
         "@babel/generator": "^8.0.0",
@@ -689,8 +691,7 @@
       "resolved": "https://registry.npmjs.org/@cloudflare/workers-types/-/workers-types-4.20260630.1.tgz",
       "integrity": "sha512-yl+c9vwvko9UZ0frmtsHuwOh3BRHvNjLrfelAp5Akpqe1+Ho1UWekr3nmjJ1D64CH0Yb0K0oRMV4i7npOFzsog==",
       "dev": true,
-      "license": "MIT OR Apache-2.0",
-      "peer": true
+      "license": "MIT OR Apache-2.0"
     },
     "node_modules/@cspotcode/source-map-support": {
       "version": "0.8.1",
@@ -705,6 +706,30 @@
         "node": ">=12"
       }
     },
+    "node_modules/@emnapi/core": {
+      "version": "1.11.3",
+      "resolved": "https://registry.npmjs.org/@emnapi/core/-/core-1.11.3.tgz",
+      "integrity": "sha512-zLpS5asjEb7lq8jYLq37N6XKaE41DIexlY1rF/z4/tIl3wo13Sqm28fRyfIsKZD+NZ8mM5RoKkpW/rBcuoSZSg==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "peer": true,
+      "dependencies": {
+        "@emnapi/wasi-threads": "1.2.3",
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@emnapi/runtime": {
+      "version": "1.11.3",
+      "resolved": "https://registry.npmjs.org/@emnapi/runtime/-/runtime-1.11.3.tgz",
+      "integrity": "sha512-Xz4Tpyki7XyrpbUK1jR1AhdAdaXyhhY4lZ3neLodmhpuWfy2PAQN5B46sAiU4liOXGLkHypn/qU+jvfWSCYYLA==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
     "node_modules/@emnapi/wasi-threads": {
       "version": "1.2.3",
       "resolved": "https://registry.npmmirror.com/@emnapi/wasi-threads/-/wasi-threads-1.2.3.tgz",
@@ -712,6 +737,7 @@
       "dev": true,
       "license": "MIT",
       "optional": true,
+      "peer": true,
       "dependencies": {
         "tslib": "^2.4.0"
       }
@@ -2682,6 +2708,27 @@
         "node": ">=14.0.0"
       }
     },
+    "node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@emnapi/core": {
+      "version": "1.11.1",
+      "dev": true,
+      "inBundle": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@emnapi/wasi-threads": "1.2.2",
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@emnapi/runtime": {
+      "version": "1.11.1",
+      "dev": true,
+      "inBundle": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
     "node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@emnapi/wasi-threads": {
       "version": "1.2.2",
       "dev": true,
@@ -2840,7 +2887,6 @@
       "integrity": "sha512-fc3KiUoBt6kie0N9bIW3E47vZsuaMf0PM2AaUpLCLT0s/LvX1nxAim6Fc049cNxODPpGm6qRAuUOB86SkRuPQw==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "undici-types": "~8.3.0"
       }
@@ -2927,7 +2973,6 @@
         }
       ],
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "baseline-browser-mapping": "^2.10.44",
         "caniuse-lite": "^1.0.30001806",
@@ -3823,7 +3868,6 @@
       "resolved": "https://registry.npmjs.org/preact/-/preact-10.29.3.tgz",
       "integrity": "sha512-D9NL1GAnJZhc3RndVs4gDdxEeU9TcHgywMrhhOsnpdlvFjdbx0gAsLUnH6JEhlJH5giL7Tx5biWPUSEXE/HPzw==",
       "license": "MIT",
-      "peer": true,
       "funding": {
         "type": "opencollective",
         "url": "https://opencollective.com/preact"
@@ -4078,7 +4122,6 @@
       "integrity": "sha512-X8EX+XV4QR5xCsrgxaED954zTDfY8KqlDtskKEL0cHhyS/P8b4IFOvGDQpsC9Q1XnLq915wEfwwY/zzskCtmhg==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "esbuild": "~0.28.0"
       },
@@ -4147,7 +4190,6 @@
       "integrity": "sha512-i7qRCmY42zmCwnYlh9H2SvLEypEFGye5iRmEMKjcGi7zk9UquigRjFtTLz0TYqr0ZGLZhaMHl/foy1bZR+Cwlw==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "pathe": "^2.0.3"
       }
@@ -4198,7 +4240,6 @@
       "integrity": "sha512-Ds+gBRbj0lwRO2Y5hwnUBdxSwlAve9LeRyU4sNnAr0ewW0gWF0n5bgXgUzbgZ49MV9BVUAQUFYVcDUcilUExMA==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "lightningcss": "^1.32.0",
         "picomatch": "^4.0.4",
@@ -4296,7 +4337,6 @@
       "dev": true,
       "hasInstallScript": true,
       "license": "Apache-2.0",
-      "peer": true,
       "bin": {
         "workerd": "bin/workerd"
       },
diff --git a/package.json b/package.json
index 8835a06e..c2972489 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,9 @@
   "license": "LGPL-3.0",
   "main": "src/index.ts",
   "type": "module",
+  "engines": {
+    "node": "^22.19.0 || >=24.11.0"
+  },
   "scripts": {
     "dev": "wrangler dev -c wrangler.toml",
     "dev:kv": "wrangler dev -c wrangler.kv.toml",