diff --git a/requirements.txt b/requirements.txt
index 9bb9cc9..2a8b23e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -73,7 +73,7 @@ terminado==0.6
 testpath==0.3
 tornado==4.5.2
 traitlets==4.3.2
-urllib3==1.23
+urllib3==1.26.5
 visdcc==0.0.34
 wcwidth==0.1.7
 Werkzeug==0.14.1