diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index bd866e0..272b4d1
--- a/requirements.txt
+++ b/requirements.txt
@@ -99,7 +99,7 @@ testpath==0.3.1
 tornado==5.0.2
 tqdm==4.23.4
 traitlets==4.3.2
-urllib3==1.22
+urllib3==1.26.5
 wcwidth==0.1.7
 Werkzeug==0.14.1
 widgetsnbextension==3.2.1