diff --git a/requirements-dev.txt b/requirements-dev.txt
index 3ce8181..03bf00c 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,6 +1,6 @@
 build==0.10.0
 mkdocs==1.5.2
-mkdocs-material==9.1.18
+mkdocs-material==9.1.21
 mkdocstrings[python]==0.22.0
 twine==4.0.2
 wheel==0.41.1