diff --git a/types/aws-lambda-fastify/package.json b/types/aws-lambda-fastify/package.json
index d5d2418a3aa241..6a0b350c2f0ec2 100644
--- a/types/aws-lambda-fastify/package.json
+++ b/types/aws-lambda-fastify/package.json
@@ -1,6 +1,6 @@
 {
     "private": true,
     "dependencies": {
-        "fastify": "^3.14.2"
+        "fastify": "^4.0.0"
     }
 }