diff --git a/package.json b/package.json
index c3abcea..9b52f3b 100644
--- a/package.json
+++ b/package.json
@@ -183,7 +183,7 @@
     "karma-sinon-chai": "^1.2.0",
     "lolex": "^1.4.0",
     "mocha": "^2.3.3",
-    "opn": "^4.0.1",
+    "opn": "^5.0.0",
     "path": "^0.12.7",
     "phantomjs": "^1.9.18",
     "require-dir": "^0.3.0",