diff --git a/requirements.txt b/requirements.txt
index bbf9642..58f6629 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -50,7 +50,7 @@ matplotlib==3.1.0
 mecab-python===0.996-ko-0.9.2
 mistune==0.8.4
 msgpack-python==0.5.6
-nbconvert==5.5.0
+nbconvert==6.3.0
 nbformat==4.4.0
 netifaces==0.10.4
 nodebook==0.3.1