diff --git a/packages/fastify/package.json b/packages/fastify/package.json
index cb32665..9334c8d 100644
--- a/packages/fastify/package.json
+++ b/packages/fastify/package.json
@@ -65,7 +65,7 @@
     "eslint-plugin-unicorn": "56.0.1",
     "fastify": "5.2.1",
     "fastify-plugin": "5.0.1",
-    "mercurius": "16.1.0",
+    "mercurius": "16.4.0",
     "mercurius-auth": "6.0.0",
     "pg-mem": "3.0.4",
     "prettier": "3.3.3",