2 files changed, 2 insertions, 0 deletions

diff --git a/README.ja.md b/README.ja.md
index 5050abf267..4e1e6b9d87 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -1,5 +1,6 @@
 [![Build Status](https://travis-ci.org/ruby/ruby.svg?branch=master)](https://travis-ci.org/ruby/ruby)
 [![Build status](https://ci.appveyor.com/api/projects/status/0sy8rrxut4o0k960/branch/master?svg=true)](https://ci.appveyor.com/project/ruby/ruby/branch/master)
+![](https://github.com/ruby/ruby/workflows/Cygwin/badge.svg)
 ![](https://github.com/ruby/ruby/workflows/macOS/badge.svg)
 ![](https://github.com/ruby/ruby/workflows/MJIT/badge.svg)
 ![](https://github.com/ruby/ruby/workflows/Ubuntu/badge.svg)
diff --git a/README.md b/README.md
index 7c0f186a98..1e935095c6 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,6 @@
 [![Build Status](https://travis-ci.org/ruby/ruby.svg?branch=master)](https://travis-ci.org/ruby/ruby)
 [![Build status](https://ci.appveyor.com/api/projects/status/0sy8rrxut4o0k960/branch/master?svg=true)](https://ci.appveyor.com/project/ruby/ruby/branch/master)
+![](https://github.com/ruby/ruby/workflows/Cygwin/badge.svg)
 ![](https://github.com/ruby/ruby/workflows/macOS/badge.svg)
 ![](https://github.com/ruby/ruby/workflows/MJIT/badge.svg)
 ![](https://github.com/ruby/ruby/workflows/Ubuntu/badge.svg)