diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 53bc36d..c595008 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node-version: [16, 18, 20, 22]
+        node-version: [20, 22]
         os: [ubuntu-latest, windows-latest]
 
     steps:
diff --git a/.github/workflows/linting.yml b/.github/workflows/linting.yml
index 4f7dd5b..dd7f784 100644
--- a/.github/workflows/linting.yml
+++ b/.github/workflows/linting.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node-version: [18]
+        node-version: [22]
         os: [ubuntu-latest]
 
     steps:
diff --git a/package.json b/package.json
index 5af4b63..46469a9 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "fastify-type-provider-zod",
   "version": "2.1.0",
-  "description": "Zod Type Provider for Fastify@4",
+  "description": "Zod Type Provider for Fastify@5",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "files": [
@@ -19,7 +19,7 @@
     "prepublishOnly": "npm run build"
   },
   "peerDependencies": {
-    "fastify": "^4.0.0",
+    "fastify": "^5.0.0",
     "zod": "^3.14.2"
   },
   "repository": {
@@ -41,15 +41,15 @@
     "zod-to-json-schema": "^3.23.0"
   },
   "devDependencies": {
-    "@fastify/swagger": "^8.14.0",
-    "@fastify/swagger-ui": "^4.0.0",
+    "@fastify/swagger": "^9.0.0",
+    "@fastify/swagger-ui": "^5.0.1",
     "@types/node": "^20.12.12",
     "@typescript-eslint/eslint-plugin": "^7.9.0",
     "@typescript-eslint/parser": "^7.9.0",
     "@vitest/coverage-v8": "^1.6.0",
     "eslint": "^8.57.0",
     "eslint-plugin-import": "^2.29.1",
-    "fastify": "^4.27.0",
+    "fastify": "^5.0.0",
     "fastify-plugin": "^5.0.1",
     "oas-validator": "^5.0.8",
     "openapi-types": "^12.1.3",
diff --git a/src/core.ts b/src/core.ts
index e68468b..f7371b1 100644
--- a/src/core.ts
+++ b/src/core.ts
@@ -30,7 +30,8 @@ const defaultSkipList = [
 ];
 
 export interface ZodTypeProvider extends FastifyTypeProvider {
-  output: this['input'] extends z.ZodTypeAny ? z.infer<this['input']> : unknown;
+  validator: this['schema'] extends z.ZodTypeAny ? z.output<this['schema']> : unknown;
+  serializer: this['schema'] extends z.ZodTypeAny ? z.input<this['schema']> : unknown;
 }
 
 interface Schema extends FastifySchema {