diff --git a/requirements.txt b/requirements.txt
index 9e40f1a..3f671ea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.1.1
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 mpmath==1.1.0
 nbconvert==5.6.1