diff --git a/server-koa2/package.json b/server-koa2/package.json
index 5be8002..29f723d 100644
--- a/server-koa2/package.json
+++ b/server-koa2/package.json
@@ -15,7 +15,7 @@
     "@koa/cors": "2.2.1",
     "graphile-utils": "^4.4.0-beta.1",
     "http-proxy": "1.18.1",
-    "koa": "2.5.1",
+    "koa": "2.15.4",
     "koa-bodyparser": "4.2.1",
     "koa-bunyan-logger": "2.1.0",
     "koa-compress": "3.0.0",