diff --git a/package.json b/package.json
index 0259186..9da3780 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
   "devDependencies": {
     "assume": "~1.5.0",
     "browserify": "~16.2.0",
-    "mocha": "~5.1.0",
+    "mocha": "~5.2.0",
     "nyc": "~11.8.0",
     "pre-commit": "~1.2.0",
     "sauce-browsers": "~1.2.0",