diff --git a/package.json b/package.json
index 52d1ccf..d4045bf 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,7 @@
     "mockery": "^2.0.0",
     "sinon": "^1.17.6",
     "sinon-chai": "^2.8.0",
+    "socket.io-client": "^1.7.1",
     "supertest": "^2.0.1"
   }
 }