diff --git a/package.json b/package.json
index 23bd589..a797b6e 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
   "dependencies": {},
   "devDependencies": {
     "coffee-script": "~1.6.0",
-    "express": "~3.0.0",
+    "express": "~4.17.1",
     "mocha": "~1.13.0"
   },
   "contributors": [