diff --git a/package.json b/package.json
index 995f7ff..0d69406 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "babel-eslint": "^7.1.1",
     "babel-plugin-add-module-exports": "^0.2.1",
     "babel-preset-es2015": "^6.22.0",
-    "coveralls": "*",
+    "coveralls": ">=2.12.0",
     "eslint": "^3.13.1",
     "isparta": "*",
     "remark": "^7.0.0",