diff --git a/Python3/Tornado/apps/pg/requirements.txt b/Python3/Tornado/apps/pg/requirements.txt
index 19d1558f..3c8a2a1b 100644
--- a/Python3/Tornado/apps/pg/requirements.txt
+++ b/Python3/Tornado/apps/pg/requirements.txt
@@ -61,7 +61,7 @@ pysha3==1.0.2
 pytest==5.4.2
 python-dateutil==2.8.1
 pytz==2020.1
-PyYAML==5.3.1
+PyYAML==5.4
 redis==3.5.2
 requests==2.23.0
 rlp==1.2.0