diff --git a/package.json b/package.json
index 9fe81a26d..44e7d6a5a 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "socket.io": "^2.1.0",
     "socket.io-client": "^2.1.0",
     "sse": "0.0.8",
-    "ws": "^3.0.0"
+    "ws": "^6.0.0"
   },
   "scripts": {
     "mocha": "mocha test/*-test.js",