diff --git a/docs/mkdocs-base.yml b/docs/mkdocs-base.yml
index 4ed47ee..4eb4a8f 100644
--- a/docs/mkdocs-base.yml
+++ b/docs/mkdocs-base.yml
@@ -31,8 +31,8 @@ markdown_extensions:
         - pymdownx.superfences:
                 custom_fences:
                         - name: mermaid
-                                class: mermaid
-                                format: !!python/name:pymdownx.superfences.fence_code_format
+                          class: mermaid
+                          format: !!python/name:pymdownx.superfences.fence_code_format
         - pymdownx.emoji:
                 emoji_index: !!python/name:material.extensions.emoji.twemoji
                 emoji_generator: !!python/name:material.extensions.emoji.to_svg