diff --git a/requirements.txt b/requirements.txt
index 580eb86..01b7171 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ pytz==2021.1
 requests==2.25.1
 six==1.11.0
 tornado==6.1
-urllib3==1.22
+urllib3==1.26.5
 vonage==2.5.5
 websocket-client==0.48.0
 wrapt==1.12.1