diff --git a/package.json b/package.json
index 4396776..0ce694b 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
     "eslint": "^3.14.1",
     "eslint-config-airbnb-base": "^11.0.1",
     "eslint-plugin-import": "^2.2.0",
-    "mocha": "^3.2.0",
+    "mocha": "^3.4.0",
     "npm-run-all": "^4.0.1",
     "textlint": "^8.0.0",
     "textlint-tester": "^2.1.0"