diff --git a/.github/workflows/dispatch-delete-leaf-stack.yaml b/.github/workflows/dispatch-delete-leaf-stack.yaml
index 1d4a420..e11e67c 100644
--- a/.github/workflows/dispatch-delete-leaf-stack.yaml
+++ b/.github/workflows/dispatch-delete-leaf-stack.yaml
@@ -5,6 +5,7 @@ on:
     inputs:
       environment:
         description: "The leaf stack to delete"
+        type: environment
         required: true
 
 env: