diff --git a/requirements.txt b/requirements.txt
index 23b042a..a909b76 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ mkdocs-material==6.2.8
 pymdown-extensions==8.2
 mkdocs-minify-plugin==0.4.0
 jinja2==3.0.0
+six==1.16.0