diff --git a/requirements.txt b/requirements.txt
index f869ad2..e26df08 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ pyparsing==2.4.5
 pyrsistent==0.15.6
 python-dateutil==2.8.0
 pytz==2019.3
-PyYAML==5.2
+PyYAML==5.4
 requests==2.22.0
 s3transfer==0.2.1
 scipy==1.4.1