diff --git a/doc/conf.py b/doc/conf.py
index 15cb65d46a..13d1ef4e65 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -118,14 +118,15 @@
     'examples_dirs': ['../examples/modules_gallery'],
     'gallery_dirs': ['modules_gallery', ],  # path where to save gallery generated examples
     'subsection_order': ExplicitOrder([
-                                       '../examples/modules_gallery/core/',
-                                       '../examples/modules_gallery/extractors/',
+                                       '../examples/modules_gallery/core',
+                                       '../examples/modules_gallery/extractors',
                                        '../examples/modules_gallery/qualitymetrics',
                                        '../examples/modules_gallery/comparison',
                                        '../examples/modules_gallery/widgets',
                                        ]),
     'within_subsection_order': FileNameSortKey,
     'ignore_pattern': '/generate_',
+    'nested_sections': False,
 }
 
 intersphinx_mapping = {