diff --git a/pve-gui.adoc b/pve-gui.adoc
index 222d659..3c43f60 100644
--- a/pve-gui.adoc
+++ b/pve-gui.adoc
@@ -65,7 +65,7 @@ The GUI has 3 sectors:
 
 
 Dataceter Level
-~~~~~~~~~~~~~~~
+---------------
 
 [thumbnail="gui-datacenter-search.png"]
 
@@ -99,7 +99,7 @@ If you like to have more information about this see the corresponding chapter.
 
 
 Node Level
-~~~~~~~~~~
+----------
 
 [thumbnail="gui-node-summary.png"]