diff --git a/package.json b/package.json
index 9cded1d..abb0d4b 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
   "devDependencies": {
     "assume": "2.2.0",
     "istanbul": "0.4.5",
-    "mocha": "3.5.0",
+    "mocha": "6.2.0",
     "pre-commit": "1.2.0"
   },
   "dependencies": {