diff --git a/requirements/multiple_category_classification_keras.txt b/requirements/multiple_category_classification_keras.txt
index df32bde..6bcdd88 100644
--- a/requirements/multiple_category_classification_keras.txt
+++ b/requirements/multiple_category_classification_keras.txt
@@ -40,7 +40,7 @@ lxml==4.4.0
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.5.0
 nbformat==4.4.0
 notebook==6.0.0