diff --git a/requirements.txt b/requirements.txt
index 356c16b..e1ed35f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,5 +11,6 @@ MarkupSafe==1.1.1
 Pygments==2.5.2
 PyYAML==5.2
 Unidecode==1.1.1
+Werkzeug==0.9.4
 feedgen==0.9.0
 pytz==2019.3