diff --git a/requirements.txt b/requirements.txt
index dbe28e0..b58cf40 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ pyasn1-modules==0.2.7
 pyrsistent==0.15.7
 python-dateutil==2.8.0
 pytz==2019.3
-PyYAML==5.3
+PyYAML==5.4
 requests==2.22.0
 s3transfer==0.3.0
 scipy==1.4.1