diff --git a/README.md b/README.md
index cd197c6..fe8f9ec 100644
--- a/README.md
+++ b/README.md
@@ -24,6 +24,7 @@
 	: ansible-playbook cmoa_install.yaml -i <inventory file>
 
 4. Kubernetes Cluster 리셋 방법
+- 현재는 RHEL 계열 OS에서만 동작 (ex. redhat, centos, rockyos 등)
 - cmoa_install.yaml
 ```
 ---