diff --git a/README.md b/README.md
index af4f2f2..c401a4e 100644
--- a/README.md
+++ b/README.md
@@ -3,5 +3,5 @@ Used for Geek Home Platform deployment
 
 ## Build all
 
-    ansible-playbook build.yaml -e REGISTRY=${YOUR_DOCKER_REGISTRY} -e target=${TARGET}
+    ansible-playbook build.yaml -e registry=${YOUR_DOCKER_REGISTRY} -e target=${TARGET}