diff --git a/package.json b/package.json
index 091442c4eb..d0a74ed85e 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "moment": "^2.13.0",
     "mozilla-download": "^1.1.1",
     "nightmare": "^2.3.3",
-    "promise-polyfill": "^4.0.4",
+    "promise-polyfill": "^5.0.0",
     "prompt": "^1.0.0",
     "requirejs": "^2.2.0",
     "webidl2": "^2.0.11",