diff --git a/package.json b/package.json
index dc1ff70..a57c3b2 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
   "devDependencies": {
     "assume": "~1.5.0",
     "istanbul": "0.4.x",
-    "mocha": "~3.3.0",
+    "mocha": "~5.1.1",
     "pre-commit": "git://github.com/observing/pre-commit.git"
   }
 }