diff --git a/chapter14/services/citibike_api/requirements.txt b/chapter14/services/citibike_api/requirements.txt
index 7602f6da..73cf7e74 100644
--- a/chapter14/services/citibike_api/requirements.txt
+++ b/chapter14/services/citibike_api/requirements.txt
@@ -1,3 +1,5 @@
 Flask-HTTPAuth==4.1.0
-Flask==1.1.2
+Flask==2.1.0
 psycopg2==2.8.5
+Werkzeug==2.0.0
+jinja2==3.0.3