diff --git a/mkdocs.yml b/mkdocs.yml
index 42debb4..e9d58a0 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -18,7 +18,7 @@ markdown_extensions:
           format: !!python/name:pymdownx.superfences.fence_code_format
   - pymdownx.details
   - admonition
-      <type>: material/alert
+      warning: octicons/alert-16
   - pymdownx.details
   - pymdownx.tabbed:
       alternate_style: true