diff --git a/README.md b/README.md
index 0e55de4..7888671 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,13 @@
 
 Get branch or tag information without the `/ref/*` prefix
 
+## Supported Platforms
+
+*   [`ubuntu-*`](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
+*   [`macos-*`](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
+*   [`windows-*`](https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#jobsjob_idruns-on)
+
+
 ## Outputs
 
 |   Output             |    type      |  Example                    |  Description                                                      |