diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index e2d90f3..d33dedf
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ mistune==0.8.4
 more-itertools==8.1.0
 nbconvert==5.6.1
 nbformat==5.0.3
-notebook==6.0.1
+notebook==6.4.12
 numba==0.47.0
 numpy==1.17.3
 openspeechcorpus==0.1.5