diff --git a/Filer-Active-Active-cross-cluster-continuous-synchronization.md b/Filer-Active-Active-cross-cluster-continuous-synchronization.md
index 28dca81..2da7d00 100644
--- a/Filer-Active-Active-cross-cluster-continuous-synchronization.md
+++ b/Filer-Active-Active-cross-cluster-continuous-synchronization.md
@@ -31,7 +31,7 @@ Each filer has its own local change logs. `weed filer.sync` will read the logs a
 Also, the "signature" will ensure same change will only be applied once in one filer. Active-Active synchronization would not cause multiple ping-pong changes for one file update.
 
 
-## More clusters ?
+## More clusters?
 
 If there are 3 or more clusters, you can choose fully connected setup or chained setup, or any more complicated topology.