diff --git a/requirements.txt b/requirements.txt
index 384e664..b643adb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -89,7 +89,7 @@ toolz==0.9.0
 tornado==5.1
 traitlets==4.3.2
 Twisted==17.5.0
-urllib3==1.23
+urllib3==1.26.5
 wcwidth==0.1.7
 webencodings==0.5.1
 widgetsnbextension==3.4.1