diff --git a/index.js b/index.js
index 32e3862..023a495 100644
--- a/index.js
+++ b/index.js
@@ -99,7 +99,7 @@ function fastifyMiddie (fastify, options, next) {
 }
 
 module.exports = fp(fastifyMiddie, {
-  fastify: '4.x',
+  fastify: '5.x',
   name: '@fastify/middie'
 })
 module.exports.default = fastifyMiddie
diff --git a/package.json b/package.json
index 9b1365f..5ecf197 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "@types/connect": "^3.4.38",
     "@types/node": "^22.0.0",
     "cors": "^2.8.5",
-    "fastify": "^4.26.2",
+    "fastify": "^5.0.0-alpha.3",
     "helmet": "^7.1.0",
     "serve-static": "^1.15.0",
     "simple-get": "^4.0.1",
@@ -50,7 +50,7 @@
   },
   "dependencies": {
     "@fastify/error": "^4.0.0",
-    "fastify-plugin": "^4.5.1",
+    "fastify-plugin": "^5.0.0-pre.fv5.1",
     "path-to-regexp": "^6.2.2",
     "reusify": "^1.0.4"
   },