diff --git a/requirements.txt b/requirements.txt
index 2e0cafe..d037e1f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ jupyter-core==4.6.3
 Markdown==3.2.2
 MarkupSafe==1.1.1
 mecab-python3==0.996.5
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.1
 nbformat==5.0.7
 notebook==6.1.5