diff --git a/doc/conf.py b/doc/conf.py
index a3423f01a740..dbdbd0ee9278 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -367,6 +367,8 @@ def _check_dependencies():
 
 inheritance_node_attrs = dict(fontsize=16)
 
+graphviz_output_format = 'svg'
+
 
 def setup(app):
     if any(st in version for st in ('post', 'alpha', 'beta')):