diff --git a/package.json b/package.json
index e6c4ea9526..6fbd91cc3a 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
     "eslint-config-openlayers": "4.1.0",
     "expect.js": "0.3.1",
     "gaze": "^1.0.0",
-    "istanbul": "0.4.2",
+    "istanbul": "0.4.3",
     "jquery": "2.2.3",
     "mocha": "2.4.5",
     "mocha-phantomjs-core": "^1.3.0",