diff --git a/requirements.txt b/requirements.txt
index 8f57053..c894236 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ 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
 notebook==6.1.5