diff --git a/requirements.txt b/requirements.txt
index 1aef57b..f56593d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ lxml==4.4.1
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 mkl==2019.0
 more-itertools==7.2.0
 nbconvert==5.6.0