diff --git a/package.json b/package.json
index e771cf6..c325940 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
   "devDependencies": {
     "assume": "~2.0.0",
     "istanbul": "0.4.x",
-    "mocha": "~3.5.0",
+    "mocha": "~6.1.1",
     "pre-commit": "~1.2.0"
   }
 }