diff --git a/README.md b/README.md
index d5a7d2b..1274e5f 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@
 
 [![](https://ci.appveyor.com/api/projects/status/oa5l5pc964h8fv49/branch/master?svg=true)](https://ci.appveyor.com/project/opentoonz/opentoonz)
 [![](https://travis-ci.org/opentoonz/opentoonz.svg?branch=master)](https://travis-ci.org/opentoonz/opentoonz)
+[![](https://github.com/opentoonz/opentoonz/workflows/Build/badge.svg?branch=master)](https://github.com/opentoonz/opentoonz/actions)
 
 ## What is OpenToonz?
 
diff --git a/doc/README_ja.md b/doc/README_ja.md
index e5ae7b0..b18f758 100644
--- a/doc/README_ja.md
+++ b/doc/README_ja.md
@@ -4,6 +4,7 @@
 
 [![](https://ci.appveyor.com/api/projects/status/oa5l5pc964h8fv49/branch/master?svg=true)](https://ci.appveyor.com/project/opentoonz/opentoonz)
 [![](https://travis-ci.org/opentoonz/opentoonz.svg?branch=master)](https://travis-ci.org/opentoonz/opentoonz)
+[![](https://github.com/opentoonz/opentoonz/workflows/Build/badge.svg?branch=master)](https://github.com/opentoonz/opentoonz/actions)
 
 ## これは何？