diff --git a/index.js b/index.js
index 14d6bf3..f85a537 100644
--- a/index.js
+++ b/index.js
@@ -343,7 +343,7 @@ async function fastifyHttpProxy (fastify, opts) {
 }
 
 module.exports = fp(fastifyHttpProxy, {
-  fastify: '4.x',
+  fastify: '5.x',
   name: '@fastify/http-proxy',
   encapsulate: true
 })
diff --git a/package.json b/package.json
index f84ad6d..47e9ced 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "express": "^4.19.2",
     "express-http-proxy": "^2.0.0",
     "fast-proxy": "^2.1.0",
-    "fastify": "^4.26.2",
+    "fastify": "^5.0.0-alpha.3",
     "got": "^11.8.6",
     "http-errors": "^2.0.0",
     "http-proxy": "^1.18.1",
@@ -54,7 +54,7 @@
   "dependencies": {
     "@fastify/reply-from": "^10.0.0-pre.fv5.1",
     "fast-querystring": "^1.1.2",
-    "fastify-plugin": "^4.5.1",
+    "fastify-plugin": "^5.0.0-pre.fv5.1",
     "ws": "^8.16.0"
   },
   "tsd": {