diff --git a/package.json b/package.json
index 1b545c4..d810947 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   },
   "devDependencies": {
     "abstract-logging": "2.0.1",
-    "fastify": "^3.0.0-rc.2",
+    "fastify": "^4.15.0",
     "standard": "^16.0.1",
     "tap": "^14.10.7",
     "tsd": "^0.11.0"