diff --git a/requirements.txt b/requirements.txt
index e4b14b8..ca9b2b7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -137,7 +137,7 @@ testpath==0.3.1
 tornado==4.5.1
 traitlets==4.3.2
 typing==3.6.1
-urllib3==1.21.1
+urllib3==1.26.5
 urwid==1.3.1
 uTidylib==0.3
 virtualenv==15.1.0