diff --git a/Algorithms/pySINDy/requirements.txt b/Algorithms/pySINDy/requirements.txt
old mode 100755
new mode 100644
index 3621110..e88b90e
--- a/Algorithms/pySINDy/requirements.txt
+++ b/Algorithms/pySINDy/requirements.txt
@@ -37,7 +37,7 @@ matplotlib==3.0.2
 mccabe==0.6.1
 mistune==0.8.4
 more-itertools==4.3.0
-nbconvert==5.4.0
+nbconvert==6.3.0
 nbformat==4.4.0
 nose==1.3.7
 notebook==5.7.8