diff --git a/doc-requirements.txt b/doc-requirements.txt
index 8cf4d3a640857db5fca30dc54524b0634db4e423..0c201f4938647d5740d31a4017abd7ee93f4d88a 100644
--- a/doc-requirements.txt
+++ b/doc-requirements.txt
@@ -1,7 +1,7 @@
 black==23.1.0
 doc8==1.1.1
 mkdocs==1.4.2
-mkdocs-material==9.1.3
+mkdocs-material==9.1.9
 mkdocstrings==0.20.0
 mkdocstrings-python==0.9.0
 recommonmark==0.7.1