diff --git a/assignment4/requirements.txt b/assignment4/requirements.txt
index 286186e..bb2da50 100644
--- a/assignment4/requirements.txt
+++ b/assignment4/requirements.txt
@@ -24,7 +24,7 @@ Markdown==2.6.9
 MarkupSafe==1.0
 matplotlib==2.1.0
 mistune==0.8.1
-nbconvert==5.3.1
+nbconvert==6.5.1
 nbformat==4.4.0
 notebook==5.2.1
 numpy==1.13.3