diff --git a/README.md b/README.md
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 # Auto light
 Attiny10 & APDS-9930 based automatic light/switch
 
-https://github.com/N-Storm/autolight
+https://github.com/N-Storm/autolight [![Makefile CI](https://github.com/N-Storm/autolight/actions/workflows/makefile.yml/badge.svg?branch=master)](https://github.com/N-Storm/autolight/actions/workflows/makefile.yml)
 
 https://easyeda.com/NStorm/autolight-board