diff --git a/package.json b/package.json
index 5592d3a..ab98060 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   , "version": "0.0.1"
   , "private": true
   , "dependencies": {
-      "express": "2.5.8"
+      "express": "4.17.1"
     , "jqtpl": ">=1.1.0"
     , "socket.io": ">=0.9.0"
     , "mongolian": "0.1.17"