diff --git a/packages/google-cloud-language/package.json b/packages/google-cloud-language/package.json
index f2a69bf05df..9258f80f7b0 100644
--- a/packages/google-cloud-language/package.json
+++ b/packages/google-cloud-language/package.json
@@ -73,7 +73,7 @@
     "ink-docstrap": "^1.3.0",
     "intelli-espower-loader": "^1.0.1",
     "jsdoc": "^3.5.5",
-    "mocha": "^3.5.3",
+    "mocha": "^4.0.1",
     "nyc": "^11.2.1",
     "power-assert": "^1.4.4",
     "prettier": "^1.7.4"