diff --git a/requirements.txt b/requirements.txt
index aab4ac3..f5b2c01 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ jupyter-core==4.5.0
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.0.2
-mistune==0.8.4
+mistune==2.0.3
 mypy==0.701
 mypy-extensions==0.4.1
 nbconvert==5.5.0