diff --git a/requirements.txt b/requirements.txt
index da341ff..6d644f3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,7 +47,7 @@ MatchZoo==2.1.0
 mccabe==0.6.1
 mistune==0.8.4
 more-itertools==7.1.0
-nbconvert==5.5.0
+nbconvert==6.3.0
 nbformat==4.4.0
 networkx==2.3
 nltk==3.4.5