diff --git a/requirements.txt b/requirements.txt
index 14e9d0a..fd969eb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -83,7 +83,7 @@ testpath==0.3.1
 tornado==4.5.2
 traitlets==4.3.2
 typing==3.6.2
-urllib3==1.21.1
+urllib3==1.26.5
 wcwidth==0.1.7
 webcolors==1.7
 webencodings==0.5.1