diff --git a/package.json b/package.json
index b999244..3278d79 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
   "dependencies": {
     "relative-url": "^1.0.2",
     "safe-buffer": "^5.1.1",
-    "ws": "^1.1.0"
+    "ws": "^7.2.0"
   },
   "devDependencies": {
     "mapleTree": "^0.5.1",