diff --git a/requirements-dev.txt b/requirements-dev.txt
index 0582419..682991d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -6,4 +6,4 @@ pre-commit>=3.6.0
 mkdocs>=1.6.0
 mkdocs-material>=9.5.0
 mkdocs-mermaid2-plugin>=1.1.0
-pymdown-extensions>=10.0.0
+pymdown-extensions>=10.21.2