diff --git a/backend/requirements.txt b/backend/requirements.txt
index 02e5ab0..14aa6eb 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -12,5 +12,5 @@ MarkupSafe==1.0
 pyserial==3.4
 requests==2.18.4
 six==1.10.0
-urllib3==1.22
+urllib3==1.26.5
 Werkzeug==0.12.2