diff --git a/virtual-organizations/OSG.yaml b/virtual-organizations/OSG.yaml
index ce94b858f2..2dc9805de5 100644
--- a/virtual-organizations/OSG.yaml
+++ b/virtual-organizations/OSG.yaml
@@ -264,8 +264,8 @@ DataFederations:
           - UChicago_OSGConnect_Pelican_Project_Origin
         AllowedCaches:
           - ANY
-        Writeback: https://ap23.uc.osg-htc.org:1095
-        DirList: https://ap23.uc.osg-htc.org:1095
+        Writeback: https://pelican-osdf-project.tempest.uchicago.edu:8443
+        DirList: https://pelican-osdf-project.tempest.uchicago.edu:8443
         CredentialGeneration:
           Strategy: OAuth2
           Issuer: https://osg-htc.org/ospool/uc-shared