diff --git a/requirements.txt b/requirements.txt
index 4ce4483..1d8009d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ jupyter-core==4.5.0
 jupyterlab==1.0.2
 jupyterlab-server==1.0.0
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.1.0
 multimethodic==1.0
 nbconvert==5.5.0