diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index d934c60..a0e49ed
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ kiwisolver==1.0.1
 MarkupSafe==1.0
 matplotlib==3.0.1
 mistune==0.8.4
-nbconvert==5.4.0
+nbconvert==6.5.1
 nbformat==4.4.0
 networkx==2.2
 notebook==5.7.2