diff --git a/Code of Winning Methods/A4/kaggle-m5a-4th/requirements.txt b/Code of Winning Methods/A4/kaggle-m5a-4th/requirements.txt
index 48a8acf..706fbad 100644
--- a/Code of Winning Methods/A4/kaggle-m5a-4th/requirements.txt	
+++ b/Code of Winning Methods/A4/kaggle-m5a-4th/requirements.txt	
@@ -32,7 +32,7 @@ mako==1.1.3
 markupsafe==1.1.1
 matplotlib==3.2.2
 mistune==0.8.4
-nbconvert==5.6.1
+nbconvert==6.5.1
 nbformat==5.0.7
 notebook==6.0.3
 numpy==1.19.0
@@ -114,7 +114,7 @@ mako==1.1.3
 markupsafe==1.1.1
 matplotlib==3.2.2
 mistune==0.8.4
-nbconvert==5.6.1
+nbconvert==6.5.1
 nbformat==5.0.7
 notebook==6.0.3
 numpy==1.19.0