diff --git a/books/thoughtful_ml/requirements.txt b/books/thoughtful_ml/requirements.txt
old mode 100755
new mode 100644
index 3d11e0a..68bfa3a
--- a/books/thoughtful_ml/requirements.txt
+++ b/books/thoughtful_ml/requirements.txt
@@ -7,7 +7,7 @@ defusedxml==0.5.0
 entrypoints==0.2.3
 html5lib==1.0.1
 ipykernel==4.9.0
-ipython==6.5.0
+ipython==8.10.0
 ipython-genutils==0.2.0
 ipywidgets==7.4.1
 jedi==0.12.1