diff --git a/requirements.txt b/requirements.txt
index 9357100d..ca1b9332 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,10 +1,10 @@
 mkdocs
-mkdocs-material>=8
-mkdocs-material-extensions
+mkdocs-material==9.1
+mkdocs-material-extensions==1.1
 mkdocs-macros-plugin
 mkdocs-exclude
 mistune
 mkdocs-open-in-new-tab
 #mkdocs-print-site-plugin
 #mkdocs-plugin-tags
-#mkdocs-with-pdf
+#mkdocs-with-pdf
\ No newline at end of file