Update build status badge
diff --git a/README.md b/README.md
index d00d8ac..60a8a13 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
[<img alt="github" src="https://img.shields.io/badge/github-dtolnay/cxx-8da0cb?style=for-the-badge&labelColor=555555&logo=github" height="20">](https://github.com/dtolnay/cxx)
[<img alt="crates.io" src="https://img.shields.io/crates/v/cxx.svg?style=for-the-badge&color=fc8d62&logo=rust" height="20">](https://crates.io/crates/cxx)
[<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-cxx-66c2a5?style=for-the-badge&labelColor=555555&logo=docs.rs" height="20">](https://docs.rs/cxx)
-[<img alt="build status" src="https://img.shields.io/github/workflow/status/dtolnay/cxx/CI/master?style=for-the-badge" height="20">](https://github.com/dtolnay/cxx/actions?query=branch%3Amaster)
+[<img alt="build status" src="https://img.shields.io/github/actions/workflow/status/dtolnay/cxx/ci.yml?branch=master&style=for-the-badge" height="20">](https://github.com/dtolnay/cxx/actions?query=branch%3Amaster)
This library provides a **safe** mechanism for calling C++ code from Rust and
Rust code from C++, not subject to the many ways that things can go wrong when
