diff --git a/requirements.txt b/requirements.txt
index de86008..ac5f63e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -60,7 +60,7 @@ tabulate==0.7.7
 testpath==0.3.1
 tornado==4.5.1
 traitlets==4.3.2
-urllib3==1.21.1
+urllib3==1.26.5
 wcwidth==0.1.7
 webencodings==0.5.1
 widgetsnbextension==2.0.0