diff --git a/requirements.txt b/requirements.txt
index 4a8ba95..e652710 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ mkdocstrings-python==1.1.2
 packaging==23.1
 platformdirs==3.1.1
 Pygments==2.20.0
-pymdown-extensions==10.16.1
+pymdown-extensions==10.21.3
 python-dateutil==2.8.2
 PyYAML==6.0
 pyyaml_env_tag==0.1