diff --git a/assignment1/requirements.txt b/assignment1/requirements.txt
old mode 100755
new mode 100644
index 4d9577c..81b6127
--- a/assignment1/requirements.txt
+++ b/assignment1/requirements.txt
@@ -30,7 +30,7 @@ MarkupSafe==1.1.1
 matplotlib==3.0.3
 mistune==0.8.4
 nbconvert==5.4.1
-nbdime==1.0.5
+nbdime==1.1.1
 nbformat==4.4.0
 notebook==5.7.8
 numpy==1.16.2