diff --git a/Web/challenges/app1/requirements.txt b/Web/challenges/app1/requirements.txt
index e1a7882..38a761e 100644
--- a/Web/challenges/app1/requirements.txt
+++ b/Web/challenges/app1/requirements.txt
@@ -4,5 +4,5 @@ itsdangerous==0.24
 Jinja2==2.10
 MarkupSafe==1.0
 selenium==3.14.0
-urllib3==1.23
+urllib3==1.26.5
 Werkzeug==0.14.1