diff --git a/README.md b/README.md
index 7e68877..c7fa663 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
 ![Docker image](https://img.shields.io/docker/v/kklldog/agile_config?label=docker%20image)
 ![GitHub license](https://img.shields.io/github/license/dotnetcore/AgileConfig)
 ![build workflow](https://github.com/dotnetcore/AgileConfig/actions/workflows/master-ci.yml/badge.svg)
-[![Unit test coverage](https://img.shields.io/badge/unit%20test%20coverage-60%25-brightgreen)](https://github.com/dotnetcore/AgileConfig/pull/254)
+[![codecov](https://codecov.io/gh/dotnetcore/AgileConfig/graph/badge.svg)](https://codecov.io/gh/dotnetcore/AgileConfig)
 [![package workflow](https://github.com/dotnetcore/AgileConfig/actions/workflows/release-xxx.yml/badge.svg)](https://github.com/dotnetcore/AgileConfig/actions/workflows/release-xxx.yml)
 ![Commit Date](https://img.shields.io/github/last-commit/dotnetcore/AgileConfig/master.svg?logo=github&logoColor=green&label=commit)