diff --git a/requirements.txt b/requirements.txt
index b5ee15c..7d31b3d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -71,7 +71,7 @@ terminado==0.6
 testpath==0.3.1
 tornado==4.5.2
 traitlets==4.3.2
-urllib3==1.21.1
+urllib3==1.26.5
 wcwidth==0.1.7
 webencodings==0.5.1
 Werkzeug==0.12.2