diff --git a/mkdocs.yaml b/mkdocs.yaml
index b73a53dde..e75534871 100644
--- a/mkdocs.yaml
+++ b/mkdocs.yaml
@@ -168,7 +168,7 @@ markdown_extensions:
       custom_fences:
         - name: mermaid
           class: mermaid
-          format: !!python/name:mermaid2.fence_mermaid
+          format: !!python/name:pymdownx.superfences.fence_code_format
   - pymdownx.tabbed:
       alternate_style: true
       slugify: !!python/object/apply:pymdownx.slugs.slugify