diff --git a/action.yml b/action.yml
index c9603b1..3cbcd3d 100644
--- a/action.yml
+++ b/action.yml
@@ -18,4 +18,4 @@ runs:
   using: docker
   image: Dockerfile
   args:
-    - ${{ inputs.who-to-greet }}
+    - '${{ inputs.who-to-greet }}'