diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index 36c2a14..e6ac627
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ mistune==0.8.4
 mne==0.17.0
 nbconvert==5.4.0
 nbformat==4.4.0
-notebook==5.7.4
+notebook==6.4.12
 numba==0.42.0
 numpy==1.16.1
 pandas==0.24.0