diff --git a/requirements.txt b/requirements.txt
index 5dbd11d..607c567 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -66,7 +66,7 @@ Mako==1.1.2
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.2.1
-mistune==0.8.4
+mistune==2.0.3
 mpmath==1.1.0
 nbconvert==5.6.1
 nbformat==5.0.4