diff --git a/modules/monitoring/public/css/module.less b/modules/monitoring/public/css/module.less
index 65150c5e2..030eba7af 100644
--- a/modules/monitoring/public/css/module.less
+++ b/modules/monitoring/public/css/module.less
@@ -1,6 +1,18 @@
 // {{{ICINGA_LICENSE_HEADER}}}
 // {{{ICINGA_LICENSE_HEADER}}}
 
+h1 {
+    font-size: 1em;
+}
+
+h2 {
+    font-size: 1em;
+}
+
+h3 {
+    font-size: 1em;
+}
+
 table.action.comments td p, table.action.downtimes td p {
   margin: 0;
   font-size: 0.8em;