diff --git a/requirements.txt b/requirements.txt
index b819902..2c0c48c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -54,7 +54,7 @@ tornado==4.5.1
 traitlets==4.3.2
 twilio==6.6.3
 tzlocal==1.5
-urllib3==1.21.1
+urllib3==1.26.5
 virtualenv==15.0.1
 wcwidth==0.1.7
 webencodings==0.5.1