diff --git a/assignment1/requirements.txt b/assignment1/requirements.txt
old mode 100755
new mode 100644
index e06a766..c2d94e2
--- a/assignment1/requirements.txt
+++ b/assignment1/requirements.txt
@@ -13,7 +13,7 @@ decorator==4.0.6
 future==0.16.0
 gnureadline==6.3.3
 ipykernel==4.2.2
-ipython==4.0.1
+ipython==7.16.3
 ipython-genutils==0.1.0
 ipywidgets==4.1.1
 jsonschema==2.5.1