diff --git a/requirements.txt b/requirements.txt
index ab491ed..893b74a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ matplotlib==3.1.2
 mecab-python3==0.996.2
 mistune==0.8.4
 more-itertools==8.0.0
-nbconvert==5.6.1
+nbconvert==6.3.0
 nbformat==4.4.0
 networkx==2.4
 notebook==6.1.5