diff --git a/requirements.txt b/requirements.txt
index 7893ddc..e215419 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ jupyter-core==4.4.0
 lazy-object-proxy==1.4.1
 MarkupSafe==1.1.1
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 murmurhash==1.0.2
 nbconvert==5.5.0
 nbformat==4.4.0