diff --git a/requirements.txt b/requirements.txt
index 2bda7fc5b2..11c0ec572d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-mkdocs
+mkdocs<2.0
 mkdocs-material
 mkdocs-redirects
 mkdocs-git-revision-date-localized-plugin