diff --git a/index.js b/index.js
index 3fa705e..78d2f0f 100644
--- a/index.js
+++ b/index.js
@@ -15,6 +15,6 @@ function loadAndValidateEnvironment (fastify, opts, done) {
 }
 
 module.exports = fp(loadAndValidateEnvironment, {
-  fastify: '3.x',
-  name: 'fastify-env'
+  fastify: '4.x',
+  name: '@fastify/env'
 })
diff --git a/package.json b/package.json
index fca2a21..fa1494f 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   "devDependencies": {
     "@types/node": "^17.0.0",
     "cross-env": "^7.0.2",
-    "fastify": "^3.0.0",
+    "fastify": "^4.0.0-rc.2",
     "pre-commit": "^1.2.2",
     "snazzy": "^9.0.0",
     "standard": "^17.0.0",