diff --git a/requirements.txt b/requirements.txt
index 5c2d657..58623e2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ kiwisolver==1.1.0
 Markdown==3.1.1
 MarkupSafe==1.0
 matplotlib==3.0.3
-mistune==0.8.3
+mistune==2.0.3
 nb-anacondacloud==1.4.0
 nb-conda==2.2.1
 nb-conda-kernels==2.1.0