diff --git a/README.md b/README.md
index 4d39f6d..7f2ae8b 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ Install using `npm`:
 npm i fastify-floc-off
 ```
 
-For Fastify v3.x support, use `fastify-floc-off@1.0.7`.
+For Fastify v4.x support, use `fastify-floc-off@2.1.11`.
 
 ## Example usage
 
diff --git a/package.json b/package.json
index 46d447f..86c4eb6 100644
--- a/package.json
+++ b/package.json
@@ -80,7 +80,7 @@
 		"eslint-plugin-promise": "^6.1.1",
 		"eslint-plugin-regexp": "^2.2.0",
 		"eslint-plugin-security": "^2.1.1",
-		"fastify": "^4.26.1",
+		"fastify": "^5.0.0",
 		"husky": "^9.0.11",
 		"jest": "^29.7.0",
 		"license-checker": "^25.0.1",
@@ -89,6 +89,6 @@
 		"upath": "^2.0.1"
 	},
 	"dependencies": {
-		"fastify-plugin": "^4.5.1"
+		"fastify-plugin": "^5.0.1"
 	}
 }
diff --git a/src/index.js b/src/index.js
index 60d4f46..8d9efc9 100644
--- a/src/index.js
+++ b/src/index.js
@@ -32,7 +32,7 @@ async function fastifyFlocOff(server) {
 }
 
 module.exports = fp(fastifyFlocOff, {
-	fastify: "4.x",
+	fastify: "5.x",
 	name: "fastify-floc-off",
 }); // CommonJS export
 module.exports.default = fastifyFlocOff; // ESM default export