diff --git a/requirements.txt b/requirements.txt
index 0a27148..8f166d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ lazy-object-proxy==1.3.1
 lxml==4.2.5
 MarkupSafe==1.1.0
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.3.1
 nbformat==4.4.0
 numpydoc==0.8.0