diff --git a/package.json b/package.json
index 8856ddf..f95c1db 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "jsdom": "^11.0.0",
     "leaflet": "1.0.3",
     "leaflet-draw": "^0.4.9",
-    "mocha": "^3.2.0",
+    "mocha": "^4.0.0",
     "style-loader": "^0.18.0",
     "url-loader": "^0.5.7",
     "webpack": "^3.1.0",