diff --git a/requirements.txt b/requirements.txt
index c5ac5ae..31a7011 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -86,7 +86,7 @@ terminado==0.8.1
 testpath==0.3.1
 tornado==5.1
 traitlets==4.3.2
-urllib3==1.23
+urllib3==1.26.5
 wcwidth==0.1.7
 webencodings==0.5.1
 widgetsnbextension==3.4.0