diff --git a/requirements.txt b/requirements.txt
index bc09bc1..5d0593c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ kiwisolver==1.0.1
 Markdown==3.0.1
 MarkupSafe==1.1.0
 matplotlib==3.0.2
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.4.0
 nbformat==4.4.0
 nltk==3.4