diff --git a/themes/hugo-tranquilpeak-theme/package.json b/themes/hugo-tranquilpeak-theme/package.json
index 6017c57..6a3a933 100644
--- a/themes/hugo-tranquilpeak-theme/package.json
+++ b/themes/hugo-tranquilpeak-theme/package.json
@@ -27,7 +27,7 @@
   },
   "homepage": "https://github.com/kakawait/hugo-tranquilpeak-theme",
   "devDependencies": {
-    "eslint": "^2.11.1",
+    "eslint": "^6.5.1",
     "eslint-config-google": "^0.5.0",
     "grunt": "^0.4.5",
     "grunt-contrib-clean": "~0.5.0",