diff --git a/package.json b/package.json
index 715a6b6..b519e4d 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "assert-dir-equal": "^1.0.1",
     "eslint": "^5.0.0",
     "metalsmith": "^2.1.0",
-    "mocha": "^5.0.0",
+    "mocha": "^6.0.0",
     "nsp": "^3.1.0",
     "postcss-import": "^11.0.0"
   }