diff --git a/README.md b/README.md
index e9021a9..bdf0411 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 [![release](https://img.shields.io/github/release/peaceiris/actions-gh-pages.svg)](https://github.com/peaceiris/actions-gh-pages/releases/latest)
 [![GitHub release date](https://img.shields.io/github/release-date/peaceiris/actions-gh-pages.svg)](https://github.com/peaceiris/actions-gh-pages/releases)
 ![Test Action](https://github.com/peaceiris/actions-gh-pages/workflows/Test%20Action/badge.svg?branch=master&event=push)
+[![CodeFactor](https://www.codefactor.io/repository/github/peaceiris/actions-gh-pages/badge)](https://www.codefactor.io/repository/github/peaceiris/actions-gh-pages)
 [![Release Feed](https://img.shields.io/badge/release-feed-yellow)](https://github.com/peaceiris/actions-gh-pages/releases.atom)
 [![Dependabot Status](https://api.dependabot.com/badges/status?host=github&repo=peaceiris/actions-gh-pages)](https://dependabot.com)