diff --git a/package.json b/package.json
index 39e9437..cc6831f 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,6 @@
     "mocha": "~5.0.0",
     "pre-commit": "~1.2.0",
     "primus": "~7.1.0",
-    "ws": "~4.1.0"
+    "ws": "~5.0.0"
   }
 }