diff --git a/requirements.txt b/requirements.txt
index 0596ebf..5f9680f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ llvmlite==0.30.0
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 mock==3.0.5
 nbconvert==5.6.0
 nbformat==4.4.0