diff --git a/requirements-docs.txt b/requirements-docs.txt
index fbf59a3..54ee32a 100644
--- a/requirements-docs.txt
+++ b/requirements-docs.txt
@@ -4,4 +4,4 @@
 
 mkdocs>=1.6
 mkdocs-material>=9.5
-pymdown-extensions>=10.7
+pymdown-extensions>=10.21.3