diff --git a/1.Cluster/README.md b/1.Cluster/README.md
index 4bf2a7d..de5e603 100644
--- a/1.Cluster/README.md
+++ b/1.Cluster/README.md
@@ -15,4 +15,4 @@
 
 1. rke up
 2. install cert-manager
-3. install longhorn with 2 replicas in storageClass
+3. install longhorn with 3 replicas in storageClass