diff --git a/package.json b/package.json
index 70215824cf..edb94ca158 100644
--- a/package.json
+++ b/package.json
@@ -75,7 +75,7 @@
     "proj4": "2.4.4",
     "recast": "0.14.7",
     "serve": "^6.5.5",
-    "sinon": "^4.5.0",
+    "sinon": "^5.0.1",
     "url-polyfill": "^1.0.13",
     "walk": "^2.3.9",
     "webpack": "3.11.0",