diff --git a/requirements.txt b/requirements.txt
index af6faeb..c2064ec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ psycopg2==2.8.5
 python-dateutil==2.8.1
 python-dotenv==0.13.0
 pytz==2020.1
-PyYAML==5.3.1
+PyYAML==5.4
 requests==2.24.0
 scipy==1.5.0
 six==1.15.0