diff --git a/package.json b/package.json
index f711181..214ebba 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "karma": "~1.1.2",
     "karma-chrome-launcher": "~1.0.1",
     "karma-coverage": "^1.1.1",
-    "karma-coverage-istanbul-reporter": "^1.3.0",
+    "karma-coverage-istanbul-reporter": "^2.1.0",
     "karma-coveralls": "~1.1.2",
     "karma-firefox-launcher": "~1.0.0",
     "karma-ie-launcher": "~1.0.0",