diff --git a/package.json b/package.json
index 69c2be5..a2c0eeb 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "http-proxy": "^1.4.3",
     "node-pty": "0.9.0",
     "socket.io": "^2.1.1",
-    "ws": "1.1.5"
+    "ws": "5.2.5"
   },
   "engines": {
     "node": "6.x"