diff --git a/requirements.txt b/requirements.txt
index 94679ed..f2a232f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ kiwisolver==1.1.0
 lxml==4.4.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 murmurhash==1.0.2
 nbconvert==5.6.0
 nbformat==4.4.0