diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 5805dda..cce27f7
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ mysqlclient==1.4.1
 nbconvert==5.4.0
 nbformat==4.4.0
 nose==1.3.7
-notebook==5.7.4
+notebook==6.4.12
 numpy==1.16.0
 pandas==0.24.0
 pandocfilters==1.4.2