diff --git a/mkdocs.yml b/mkdocs.yml
index 3c78489..6738c73 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -107,7 +107,7 @@ markdown_extensions:
       custom_fences:
         - name: mermaid
           class: mermaid
-          format: pymdownx.superfences.fence_code_format
+          format: !!python/name:pymdownx.superfences.fence_code_format
   - attr_list
   - md_in_html
   - pymdownx.tabbed:
@@ -118,3 +118,6 @@ markdown_extensions:
 
 extra_css:
   - stylesheets/custom.css
+
+extra_javascript:
+  - https://unpkg.com/mermaid/dist/mermaid.min.js