diff --git a/requirements.txt b/requirements.txt
index 5197b09..acb2f6d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,7 @@ cairosvg
 jinja2>=3.0.2
 markdown>=3.2
 mkdocs>=1.4.0
+mkdocs-material
 mkdocs-material-extensions>=1.0.3
 mkdocs-minify-plugin
 #mkdocs-multirepo-plugin