diff --git a/example/koa/package.json b/example/koa/package.json
index f9db4782..55967551 100644
--- a/example/koa/package.json
+++ b/example/koa/package.json
@@ -31,6 +31,6 @@
     "tsbb": "^3.4.4"
   },
   "dependencies": {
-    "koa": "2.13.3"
+    "koa": "2.13.4"
   }
 }