diff --git a/Filer-Active-Active-cross-cluster-continuous-synchronization.md b/Filer-Active-Active-cross-cluster-continuous-synchronization.md
index ed91164..913677b 100644
--- a/Filer-Active-Active-cross-cluster-continuous-synchronization.md
+++ b/Filer-Active-Active-cross-cluster-continuous-synchronization.md
@@ -6,7 +6,7 @@ It can run either in Active-Active mode or Active-Passive mode.
 
 # Usage
 
-From any computer that can access filer, master and volume serve in both SeaweedFS clusters, run this command:
+From any computer that can access filer and volume servers in both SeaweedFS clusters, run this command:
 
 ```
 # synchronize each cluster