diff --git a/Tutorial0_setup/requirements.txt b/Tutorial0_setup/requirements.txt
old mode 100755
new mode 100644
index bcf8941..da020df
--- a/Tutorial0_setup/requirements.txt
+++ b/Tutorial0_setup/requirements.txt
@@ -12,7 +12,7 @@ matplotlib==3.0.3
 nbconvert==5.4.1
 nbdime==1.0.5
 nbformat==4.4.0
-notebook==5.7.8
+notebook==6.4.12
 numpy==1.16.2
 Pillow==6.0.0
 scipy==1.2.1