diff --git a/package.json b/package.json
index 6bea11b..0730f54 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
   },
   "devDependencies": {
     "chai": "^3.5.0",
-    "coveralls": "^2.11.12",
+    "coveralls": "^2.11.15",
     "istanbul": "^0.4.4",
     "mocha": "^3.0.2",
     "sinon": "^1.17.5"