diff --git a/requirements.txt b/requirements.txt
index 508b79e..4fff500 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ kiwisolver==1.3.1
 MarkupSafe==2.0.1
 matplotlib==3.4.2
 matplotlib-inline==0.1.2
-mistune==0.8.4
+mistune==2.0.3
 msgpack-python==0.5.6
 msgpack-rpc-python==0.4.1
 mypy-extensions==0.4.3