diff --git a/docs/source/api/problems/zoo.quad.rst b/docs/source/api/problems/zoo.quad.rst
index 7c655e800..8b263a767 100644
--- a/docs/source/api/problems/zoo.quad.rst
+++ b/docs/source/api/problems/zoo.quad.rst
@@ -1,4 +1,5 @@
 Quadrature
+----------
 
 .. automodapi:: probnum.problems.zoo.quad
     :no-heading: