diff --git a/flask/requirements.txt b/flask/requirements.txt
index 41a7f8e..a9885fa 100644
--- a/flask/requirements.txt
+++ b/flask/requirements.txt
@@ -13,5 +13,5 @@ numpy==1.14.5
 python-dateutil==2.7.3
 requests==2.19.1
 six==1.11.0
-urllib3==1.23
+urllib3==1.26.5
 Werkzeug==0.14.1