diff --git a/public/css/icinga/base.less b/public/css/icinga/base.less
index 776ee4d5aa..f16e9b915f 100644
--- a/public/css/icinga/base.less
+++ b/public/css/icinga/base.less
@@ -51,22 +51,24 @@ body {
 
 h1, h2, h3, h4, h5, h6 {
   border-bottom: 1px solid @gray-lighter;
-  font-size: 1em;
   font-weight: @font-weight-bold;
-  margin: @vertical-padding 0;
+  margin: 0.556em 0 0.333em;
 }
 
 h1 {
-  border-color: @gray-light;
-  font-size: 1.286em;
+  font-size: 1.5em;
 }
 
 h2 {
-  font-size: 1.143em;
+  font-size: 1.333em;
 }
 
 h3 {
-  font-size: 1.143em;
+  font-size: 1.167em;
+}
+
+h4 {
+  font-size: 1em;
 }
 
 h5 {