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..b63522a 100644
--- a/Code of Winning Methods/A4/kaggle-m5a-4th/requirements.txt	
+++ b/Code of Winning Methods/A4/kaggle-m5a-4th/requirements.txt	
@@ -57,7 +57,7 @@ pyrsistent==0.16.0
 python-dateutil==2.8.1
 python-editor==1.0.4
 pytz==2020.1
-pyyaml==5.3.1
+pyyaml==5.4
 pyzmq==19.0.1
 qtconsole==4.7.5
 qtpy==1.9.0
@@ -139,7 +139,7 @@ pyrsistent==0.16.0
 python-dateutil==2.8.1
 python-editor==1.0.4
 pytz==2020.1
-pyyaml==5.3.1
+pyyaml==5.4
 pyzmq==19.0.1
 qtconsole==4.7.5
 qtpy==1.9.0