diff --git a/requirements.txt b/requirements.txt
index 2572a621..c0828fd3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,5 @@ git+https://${MATERIAL_INSIDERS}@github.com/whallin/local-mkdocs-material-inside
 pillow
 cairosvg
 mkdocs-git-committers-plugin-2
-mkdocs-redirects
\ No newline at end of file
+mkdocs-redirects
+idna>=3.7