diff --git a/planetstack/core/models/site.py b/planetstack/core/models/site.py
index 1b9963f..04d1073 100644
--- a/planetstack/core/models/site.py
+++ b/planetstack/core/models/site.py
@@ -225,6 +225,9 @@
         return qs 
 
 class SiteDeployments(PlCoreBase):
+    objects = DeploymentLinkManager()
+    deleted_objects = DeploymentLinkDeletionManager()
+
     site = models.ForeignKey(Site)
     deployment = models.ForeignKey(Deployment)
     tenant_id = models.CharField(null=True, blank=True, max_length=200, help_text="Keystone tenant id")