diff --git a/action.yml b/action.yml
index 5327ae9..e6b4410 100644
--- a/action.yml
+++ b/action.yml
@@ -42,7 +42,7 @@ inputs:
     default: 'create'
   USE_PULUMI:
     description: 'use pulumi instead of terraform'
-    required: false
+    required: true
     default: 'false'
   CREATE_ACR:
     description: 'create ACR with cluster name'