diff --git a/requirements.txt b/requirements.txt
index e07d2c3..c6c7f57 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ jupyter-client==6.0.0
 jupyter-console==6.1.0
 jupyter-core==4.6.3
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.1
 nbformat==5.0.4
 nltk==3.5