diff --git a/requirements.txt b/requirements.txt
index a6bf77c..eafd80c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 mdx_truly_sane_lists==1.3
 mkdocs===1.4.2
 mkdocs-macros-plugin==0.7.0
-mkdocs-material==9.1.11
+mkdocs-material==9.1.21
 mkdocs-simple-hooks==0.1.5