diff --git a/package.json b/package.json
index 74a57bc..356adbc 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     "chai": "^4.1.2",
     "cldr-data": "^31.0.2",
     "cldrjs": "^0.5.0",
-    "coveralls": "^2.13.1",
+    "coveralls": "^3.0.0",
     "esdoc": "^1.0.3",
     "eslint": "^4.7.2",
     "eslint-config-js-joda": "^1.0.0",