diff --git a/README.md b/README.md
index db2cb81..bfca22e 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 [![release](https://img.shields.io/github/release/peaceiris/actions-pixela.svg)](https://github.com/peaceiris/actions-pixela/releases/latest)
 [![GitHub release date](https://img.shields.io/github/release-date/peaceiris/actions-pixela.svg)](https://github.com/peaceiris/actions-pixela/releases)
 [![GitHub Actions status](https://github.com/peaceiris/actions-pixela/workflows/Docker%20Image%20CI/badge.svg)](https://github.com/peaceiris/actions-pixela/actions)
+[![codecov](https://codecov.io/gh/peaceiris/actions-pixela/branch/master/graph/badge.svg)](https://codecov.io/gh/peaceiris/actions-pixela)