diff --git a/README.md b/README.md
index fa408f2..ed1ef7a 100644
--- a/README.md
+++ b/README.md
@@ -46,4 +46,5 @@ jobs:
         with:
           WAKATIME_API_KEY: ${{ secrets.WAKATIME_API_KEY }}
           GH_TOKEN: ${{ secrets.GH_TOKEN}}
-```
\ No newline at end of file
+          USERNAME: <username> # optional, it will automaticially use the username that executing the workflow
+```