diff --git a/TreeViz/requirements.txt b/TreeViz/requirements.txt
index e82c1c7..6ca40fe 100644
--- a/TreeViz/requirements.txt
+++ b/TreeViz/requirements.txt
@@ -53,7 +53,7 @@ lxml==3.3.3
 matplotlib==1.3.1
 mistune==0.7.1
 mock==1.3.0
-nbconvert==4.0.0
+nbconvert==6.3.0
 nbformat==4.0.0
 nose==1.3.7
 notebook==4.0.4