diff --git a/pom.xml b/pom.xml
index cb6d4d7e13adc42c4a43246b62e5b34b7109d73f..6be3443197480b9bc8da396636713132b3ed32c7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -134,7 +134,7 @@
                             <attributes>
                                 <source-highlighter>highlightjs</source-highlighter>
                                 <toc>left</toc>
-                                <toclevels>left</toclevels>
+                                <toclevels>3</toclevels>
                             </attributes>
                         </configuration>
                     </execution>