diff --git a/assignment1/requirements.txt b/assignment1/requirements.txt
old mode 100755
new mode 100644
index 4d9577c..c5947f6
--- a/assignment1/requirements.txt
+++ b/assignment1/requirements.txt
@@ -57,7 +57,7 @@ terminado==0.8.2
 testpath==0.4.2
 tornado==6.0.2
 traitlets==4.3.2
-urllib3==1.24.1
+urllib3==1.26.5
 wcwidth==0.1.7
 webencodings==0.5.1
 widgetsnbextension==3.4.2