diff --git a/package.json b/package.json
index 00b8a5c..36e7db6 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "babel-register": "^6.9.0",
     "chokidar-cli": "^1.2.0",
     "codecov": "^1.0.1",
-    "eslint": "^3.10.0",
+    "eslint": "^6.6.0",
     "eslint-config-mysticatea": "^7.0.1",
     "mocha": "^3.0.2",
     "npm-run-all": "^3.1.0",