diff --git a/requirements.txt b/requirements.txt
index f1e8471..9488669 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,5 @@ flask_wtf==0.14.2
 greenstalk==1.0.1
 psycopg2==2.8.4
 python-dotenv==0.10.5
+Werkzeug==0.16.1
 WTForms==2.2.1