diff --git a/servers/dsub/requirements.txt b/servers/dsub/requirements.txt
index c1cbb1e98..3b29b6748 100644
--- a/servers/dsub/requirements.txt
+++ b/servers/dsub/requirements.txt
@@ -28,7 +28,7 @@ pyasn1==0.4.3
 pyasn1-modules==0.2.2
 python-dateutil==2.7.3
 pytz==2018.5
-PyYAML==5.1
+PyYAML==5.4
 requests==2.20.0
 retrying==1.3.3
 rsa==3.4.2