diff --git a/Tutorial0_setup/requirements.txt b/Tutorial0_setup/requirements.txt
old mode 100755
new mode 100644
index bcf8941..d04dac8
--- a/Tutorial0_setup/requirements.txt
+++ b/Tutorial0_setup/requirements.txt
@@ -1,5 +1,5 @@
 ipykernel==5.1.0
-ipython==7.4.0
+ipython==7.16.3
 ipython-genutils==0.2.0
 ipywidgets==7.4.2
 jupyter==1.0.0