diff --git a/2021-Fall/assignment4/requirements.txt b/2021-Fall/assignment4/requirements.txt
index c310bc6..f0a102a 100644
--- a/2021-Fall/assignment4/requirements.txt
+++ b/2021-Fall/assignment4/requirements.txt
@@ -25,7 +25,7 @@ grpcio==1.41.0
 h5py==3.1.0
 idna==3.2
 ipykernel==6.3.1
-ipython==7.27.0
+ipython==7.31.1
 ipython-genutils==0.2.0
 ipywidgets==7.6.4
 jedi==0.18.0