diff --git a/requirements.txt b/requirements.txt
index b084715..f6aa109 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ kiwisolver==1.0.1
 Markdown==3.0.1
 MarkupSafe==1.1.0
 matplotlib==2.2.3
-mistune==0.8.4
+mistune==2.0.3
 mmdnn==0.2.5
 mnist==0.2.2
 mock==2.0.0