diff --git a/requirements.txt b/requirements.txt
index db61e80..00d114c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ paginate==0.5.7
 pathspec==0.12.1
 platformdirs==4.3.8
 Pygments==2.20.0
-pymdown-extensions==10.16.1
+pymdown-extensions==10.21.3
 python-dateutil==2.9.0.post0
 PyYAML==6.0.2
 pyyaml_env_tag==1.1