diff --git a/requirements.txt b/requirements.txt
index e1d818a..3a62958 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ testpath==0.3.1
 tornado==4.5.2
 traitlets==4.3.2
 typing==3.6.2
-urllib3==1.22
+urllib3==1.24.2
 wcwidth==0.1.7
 webencodings==0.5.1
 widgetsnbextension==3.0.8