diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 34a3f5a..652fc53
--- a/requirements.txt
+++ b/requirements.txt
@@ -109,7 +109,7 @@ testpath==0.4.2
 tornado==5.1.1
 tqdm==4.28.1
 traitlets==4.3.2
-urllib3==1.24.1
+urllib3==1.26.5
 wcwidth==0.1.7
 Werkzeug==0.14.1
 widgetsnbextension==3.4.2