diff --git a/requirements.txt b/requirements.txt
index 7c8aca9..2de82f4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ pydicom==1.3.0
 pypng==0.0.20
 python-dateutil==2.8.0
 pytz==2019.3
-PyYAML==5.3.1
+PyYAML==5.4
 requests==2.24.0
 requests-oauthlib==1.3.0
 retrying==1.3.3