diff --git a/cover/requirements.txt b/cover/requirements.txt
index 1a01ec3..4cdb102 100644
--- a/cover/requirements.txt
+++ b/cover/requirements.txt
@@ -81,7 +81,7 @@ testpath==0.4.2
 text-unidecode==1.2
 tornado==5.1.1
 traitlets==4.3.2
-urllib3==1.23
+urllib3==1.26.5
 virtualenv==16.0.0
 virtualenv-clone==0.3.0
 wcwidth==0.1.7