diff --git a/package.json b/package.json
index 6978b84..182ee23 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "chai-as-promised": "^5.1.0",
     "chai-subset": "^1.1.0",
     "conventional-changelog-cli": "^1.0.0",
-    "es6-promise": "^3.0.2",
+    "es6-promise": "^4.0.4",
     "istanbul": "^0.4.2",
     "jsdoc-to-markdown": "^1.3.7",
     "mocha": "^2.2.5",