diff --git a/requirements_dev.txt b/requirements_dev.txt
index 715b13d..0971edb 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -6,7 +6,7 @@ d8s-strings>=0.5.0,<1.0
 flake8>=3.9.2,<6.0
 flake8-cognitive-complexity>=0.1.0,<1.0
 ipython>7.0,<9.0
-mkdocs-material>=8.0.1,<9.0
+mkdocs-material>=8.0.1,<10.0
 mypy>=0.910,<1.0
 pylint>=2.9.6,<3.0
 pytest-benchmark>=3.4.1,<5.0