diff --git a/package.json b/package.json
index 2e3d312..5171594 100644
--- a/package.json
+++ b/package.json
@@ -88,6 +88,7 @@
     "trendmicro-ui": "~0.3.0",
     "url-loader": "~0.5.8",
     "webpack": "~2.2.1",
-    "webpack-dev-server": "~2.4.1"
+    "webpack-dev-server": "~2.4.1",
+    "which": "~1.2.12"
   }
 }