diff --git a/requirements.txt b/requirements.txt
index 5644f1b..c8be7e4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -54,7 +54,7 @@ kiwisolver==1.2.0
 Markdown==3.2.2
 MarkupSafe==1.1.1
 matplotlib==3.1.3
-mistune==0.8.4
+mistune==2.0.3
 mkl-service==2.3.0
 nbconvert==5.6.1
 nbdime==2.0.0