diff --git a/README.md b/README.md
index 341813a..5b0bb2e 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,11 @@
 Composite GitHub Action installs a fresh Podman version in your GitHub Actions workflow. Only for Linux
 (`runs-on: ubuntu-latest`) runners.
 
+> [!IMPORTANT]
+> Since it was just an experiment to simplify fresh Podman installations in GitHub Actions, we no longer recommend
+> using this action. Please refer to the official Podman documentation for
+> [installation instructions](https://podman.io/docs/installation).
+
 ## Usage
 
 ```yaml
diff --git a/action.yml b/action.yml
index 46d2a8b..0020689 100644
--- a/action.yml
+++ b/action.yml
@@ -17,6 +17,12 @@ inputs:
 runs:
   using: composite
   steps: # manual: <https://podman.io/docs/installation#debian>
+    - shell: bash
+      run: >
+        echo '::warning title=Action gacts/install-podman is deprecated::Since it was just an experiment to simplify
+        fresh Podman installations in GitHub Actions, we no longer recommend using this action. Please refer to the
+        official Podman documentation for installation instructions: https://podman.io/docs/installation'
+
     - if: ${{ inputs.kind == 'testing' }}
       shell: bash
       run: |