diff --git a/requirements.txt b/requirements.txt
index e6ce157..ce940fe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ llvmlite==0.32.1
 lucid==0.3.8
 markdown==3.2.2
 markupsafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.3.0
 nbconvert==5.6.1
 nbformat==5.0.6