diff --git a/flask_app1/requirements.txt b/flask_app1/requirements.txt
index 81d188a..44229e8 100644
--- a/flask_app1/requirements.txt
+++ b/flask_app1/requirements.txt
@@ -8,4 +8,4 @@ packaging==16.8
 pkg-resources==0.0.0
 pyparsing==2.1.10
 six==1.10.0
-Werkzeug==0.11.15
+Werkzeug==0.15.3