diff --git a/package.json b/package.json
index 35f3ed0..910c127 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,8 @@
     "string": "^3.3.1",
     "sugar-date": "^1.5.1",
     "ultrases": "^0.1.3",
-    "unstyler": "^0.2.2"
+    "unstyler": "^0.2.2",
+    "ws": "^1.1.1"
   },
   "scripts": {
     "start": "node web-server.js",