diff --git a/requirements.txt b/requirements.txt
index 3204821..49190bc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,6 +17,6 @@ pytz==2018.3
 requests==2.18.4
 six==1.11.0
 slackclient==1.1.2
-urllib3==1.22
+urllib3==1.26.5
 websocket-client==0.46.0
 Werkzeug==0.14.1