diff --git a/requirements.txt b/requirements.txt
index 857a4a9..4be4086 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ llvmlite==0.30.0
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 nbconvert==5.6.1
 nbformat==4.4.0