diff --git a/requirements.txt b/requirements.txt
index b225197..a945703 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -67,7 +67,7 @@ pyrsistent==0.16.0
 python-dateutil==2.8.1
 pytz==2020.1
 PyWavelets==1.1.1
-PyYAML==5.3.1
+PyYAML==5.4
 pyzmq==19.0.1
 requests==2.23.0
 s3transfer==0.3.3