diff --git a/parent/pom.xml b/parent/pom.xml
index 919bc333..686c745e 100644
--- a/parent/pom.xml
+++ b/parent/pom.xml
@@ -409,6 +409,7 @@
 											<icons>font</icons>
 											<sectanchors>true</sectanchors>
 											<stylesheet>spring.css</stylesheet>
+											<toclevels>3</toclevels>
 										</attributes>
 									</configuration>
 								</execution>