diff --git a/cs231n/assignment1/requirements.txt b/cs231n/assignment1/requirements.txt
old mode 100755
new mode 100644
index 4d9577c..95692a0
--- a/cs231n/assignment1/requirements.txt
+++ b/cs231n/assignment1/requirements.txt
@@ -13,7 +13,7 @@ gitdb2==2.0.5
 GitPython==2.1.11
 idna==2.8
 ipykernel==5.1.0
-ipython==7.4.0
+ipython==7.16.3
 ipython-genutils==0.2.0
 ipywidgets==7.4.2
 jedi==0.13.3