diff --git a/package.json b/package.json
index c9efbf77..c37eeb9d 100644
--- a/package.json
+++ b/package.json
@@ -192,7 +192,7 @@
     "request": "^2.76.0",
     "rimraf": "^2.5.4",
     "shortdate": "^1.0.1",
-    "sinon": "^3.0.0",
+    "sinon": "^4.0.0",
     "sinon-called-with-diff": "^1.0.1",
     "socket.io-client": "^2.0.1",
     "style-loader": "^0.18.2",