diff --git a/mkdocs.yml b/mkdocs.yml
index b8bbe04f..5e95ac14 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -3,6 +3,8 @@ site_url: https://developer.blender.org/docs/
 repo_url: https://projects.blender.org/blender/blender-developer-docs
 repo_name: projects.blender.org
 edit_uri: _edit/main/docs
+# Some random port to avoid collisions with other software.
+dev_addr: 127.0.0.1:3917
 
 theme:
   name: material