diff --git a/README.md b/README.md
index 96bd61d..3ad8897 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,14 @@
 # setup-swamp
 
+> [!WARNING]
+> **This action has moved to [swamp-club/setup-swamp](https://github.com/swamp-club/setup-swamp).**
+> This repository is deprecated and will no longer receive updates. Please update your workflows:
+>
+> ```diff
+> - - uses: systeminit/setup-swamp@v0.1.1
+> + - uses: swamp-club/setup-swamp@<version>
+> ```
+
 A GitHub Action to install [swamp](https://github.com/systeminit/swamp) and
 optionally authenticate with [swamp.club](https://swamp.club).
 
diff --git a/action.yml b/action.yml
index 6c2f864..a6a33c2 100644
--- a/action.yml
+++ b/action.yml
@@ -1,5 +1,5 @@
 name: "Setup Swamp"
-description: "Download and install swamp, optionally authenticate with swamp.club and initialize a repository"
+description: "(DEPRECATED: moved to swamp-club/setup-swamp) Download and install swamp, optionally authenticate with swamp.club and initialize a repository"
 branding:
   icon: "terminal"
   color: "green"
@@ -28,6 +28,10 @@ outputs:
 runs:
   using: "composite"
   steps:
+    - name: Deprecation notice
+      shell: bash
+      run: echo "::warning title=setup-swamp has moved::systeminit/setup-swamp is deprecated and will no longer receive updates. Please switch to swamp-club/setup-swamp."
+
     - name: Install swamp
       shell: bash
       env: