diff --git a/requirements.txt b/requirements.txt
index 05c6126..de6e4e0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ jupyter-client==5.1.0
 jupyter-core==4.3.0
 line-bot-sdk==1.3.0
 MarkupSafe==1.0
-mistune==0.7.4
+mistune==0.8.1
 nbconvert==5.2.1
 nbformat==4.3.0
 notebook==5.0.0