diff --git a/requirements.txt b/requirements.txt
index 3819aa0..5e2591d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ jupyter-client==5.2.4
 jupyter-console==6.0.0
 jupyter-core==4.4.0
 MarkupSafe==1.1.0
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.4.0
 nbformat==4.4.0
 nltk==3.4.5