diff --git a/requirements.txt b/requirements.txt
index dc8378e..3385966 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ terminado==0.8.1
 testpath==0.4.2
 tornado==5.1.1
 traitlets==4.3.2
-urllib3==1.25.3
+urllib3==1.25.8
 wcwidth==0.1.7
 webencodings==0.5.1
 widgetsnbextension==3.4.2