diff --git a/package.json b/package.json
index 18e4050..c6bd18f 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   },
   "devDependencies": {
     "chai": "^4.0.2",
-    "coveralls": "^2.13.1",
+    "coveralls": "^2.13.3",
     "cross-env": "^5.0.1",
     "istanbul": "^0.4.5",
     "jshint": "^2.9.4",