diff --git a/deps/acorn-plugins/acorn-private-class-elements/package.json b/deps/acorn-plugins/acorn-private-class-elements/package.json
index cd43012dc79884..e99165099e99fd 100644
--- a/deps/acorn-plugins/acorn-private-class-elements/package.json
+++ b/deps/acorn-plugins/acorn-private-class-elements/package.json
@@ -33,7 +33,7 @@
     }
   ],
   "dependencies": {
-    "mocha": "^5.2.0"
+    "mocha": "^6.0.0"
   },
   "deprecated": false,
   "description": "Helpers for supporting private class methods and fields in acorn",