diff --git a/planetstack/core/models/slice.py b/planetstack/core/models/slice.py
index 7915d42..7412fe2 100644
--- a/planetstack/core/models/slice.py
+++ b/planetstack/core/models/slice.py
@@ -87,6 +87,13 @@
             qs = Slice.objects.filter(id__in=slice_ids)
         return qs
 
+    def delete(self, *args, **kwds):
+        # delete networks associated with this slice
+        from core.models.network import Network
+        nets = Network.objects.filter(slices=self)
+        nets.delete() 
+        super(SliceAdmin, self).delete(*args, **kwds) 
+
 class SliceRole(PlCoreBase):
     ROLE_CHOICES = (('admin','Admin'),('default','Default'))