diff --git a/README.md b/README.md
index 1fd22fe..ef4db01 100644
--- a/README.md
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 A golang implementation of [endlessh](https://nullprogram.com/blog/2019/03/22/) exporting Prometheus metrics, visualized by a Grafana dashboard.
 
-![screenshot](https://github.com/shizunge/endlessh-go/raw/master/dashboard/screenshot.png)
+![screenshot](https://github.com/shizunge/endlessh-go/raw/main/dashboard/screenshot.png)
 
 ## Introduction