diff --git a/package.json b/package.json
index f43039a..b7512c5 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   "tags": ["tty", "terminal", "term", "xterm"],
   "engines": { "node": ">= 0.8.0" },
   "devDependencies": {
-    "express": "3.1.0",
+    "express": "4.17.1",
     "socket.io": "0.9.13",
     "pty.js": "0.2.4"
   }