diff --git a/src/c3nav/mapdata/models/package.py b/src/c3nav/mapdata/models/package.py
index 581c85de..600a95d3 100644
--- a/src/c3nav/mapdata/models/package.py
+++ b/src/c3nav/mapdata/models/package.py
@@ -66,7 +66,7 @@ class Package(models.Model):
         if self.home_repo is not None:
             data['home_repo'] = self.home_repo
         if self.depends.exists():
-            data['depends'] = tuple(package.name for package in self.depends.all().order_by('name'))
+            data['depends'] = tuple(self.depends.all().order_by('name').values_list('name', flat=True))
         if self.bottom is not None:
             data['bounds'] = ((float(self.bottom), float(self.left)), (float(self.top), float(self.right)))