diff --git a/requirement.txt b/requirement.txt
index fa044a1..691a731 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -23,7 +23,7 @@ kiwisolver==1.0.1
 lxml==4.3.0
 MarkupSafe==1.1.0
 matplotlib==3.0.2
-mistune==0.8.4
+mistune==2.0.3
 mpmath==1.1.0
 nbconvert==5.4.0
 nbformat==4.4.0