diff --git a/requirements.txt b/requirements.txt
index b269805..bf52c54 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ loompy==3.0.6
 louvain==0.6.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3
-mistune==0.8.4
+mistune==2.0.3
 mnnpy==0.1.9.5
 mock==3.0.5
 more-itertools==7.2.0