diff --git a/requirements.txt b/requirements.txt
index 57d8bd4..c46a952 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ preshed==3.0.2
 pyparsing==2.4.6
 python-dateutil==2.8.1
 pytz==2019.3
-PyYAML==5.3
+PyYAML==5.4
 requests==2.22.0
 s3transfer==0.3.2
 scipy==1.4.1