diff --git a/requirements.txt b/requirements.txt
index 3817e92..9b194a6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ Keras-Applications==1.0.6
 Keras-Preprocessing==1.0.5
 Markdown==3.0.1
 MarkupSafe==1.0
-mistune==0.8.3
+mistune==2.0.3
 nbconvert==5.4.0
 nbformat==4.4.0
 nltk==3.3