diff --git a/package.json b/package.json
index 2d1272ef..c37c46e0 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,8 @@
         "socket.io": "0.9.16",
         "express": "3.4.x",
         "http-auth": "2.1.x",
-        "fs-extra": "0.8.x"
+        "fs-extra": "0.8.x",
+        "pty.js": "0.2.3"
     },
     "license": "MIT",
     "engines": {