diff --git a/requirements/multiple_category_classification_keras.txt b/requirements/multiple_category_classification_keras.txt
index df32bde..ed8d674 100644
--- a/requirements/multiple_category_classification_keras.txt
+++ b/requirements/multiple_category_classification_keras.txt
@@ -43,7 +43,7 @@ matplotlib==3.1.1
 mistune==0.8.4
 nbconvert==5.5.0
 nbformat==4.4.0
-notebook==6.0.0
+notebook==6.4.1
 numpy==1.16.4
 pandas==0.25.0
 pandocfilters==1.4.2