diff --git a/API/pythonCppAPI/requirements.txt b/API/pythonCppAPI/requirements.txt
old mode 100755
new mode 100644
index a0754b2d..51ff31d6
--- a/API/pythonCppAPI/requirements.txt
+++ b/API/pythonCppAPI/requirements.txt
@@ -17,7 +17,7 @@ imageio==2.5.0
 ipydatawidgets==4.0.0
 ipykernel==5.1.1
 ipympl==0.2.1
-ipython==7.5.0
+ipython==7.16.3
 ipython-genutils==0.2.0
 ipywidgets==7.4.2
 itk-core==5.0.0.post1