diff --git a/requirements.txt b/requirements.txt
index 9bd5da6..cf4c108 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,4 +9,4 @@ mkdocs-git-authors-plugin>=0.9.0
 mkdocs-git-revision-date-localized-plugin>=1.2.6
 
 # Markdown extensions (bundled with material, listed for clarity)
-pymdown-extensions>=10.7.1
+pymdown-extensions>=10.21.3