diff --git a/deps/v8/tools/turbolizer/package.json b/deps/v8/tools/turbolizer/package.json
index dee28358d4b487..ab0afee3fb54f0 100644
--- a/deps/v8/tools/turbolizer/package.json
+++ b/deps/v8/tools/turbolizer/package.json
@@ -25,7 +25,7 @@
   "devDependencies": {
     "chai": "^4.2.0",
     "local-web-server": "^2.6.0",
-    "mocha": "^5.2.0",
+    "mocha": "^6.2.3",
     "rollup": "^0.68.2",
     "ts-mocha": "^2.0.0",
     "tslint": "^5.12.0",