diff --git a/pages/requirements.txt b/pages/requirements.txt
index 8784b220c5e49e6d50d0a0ea8a21eb34aacffda0..15f2ba17edb0e5afa8886d4a3cc191baf4f89248 100644
--- a/pages/requirements.txt
+++ b/pages/requirements.txt
@@ -3,3 +3,4 @@ mkdocs-git-revision-date-localized-plugin==0.10.3
 mkdocs-macros-plugin==0.6.3
 mike==1.1.2
 Jinja2==2.11.2
+MarkupSafe==1.1.1