diff --git a/requirements.txt b/requirements.txt
index 05c6126..420dfd4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ jupyter-core==4.3.0
 line-bot-sdk==1.3.0
 MarkupSafe==1.0
 mistune==0.7.4
-nbconvert==5.2.1
+nbconvert==6.5.1
 nbformat==4.3.0
 notebook==5.0.0
 pandocfilters==1.4.1