diff --git a/happydomain/zone.py b/happydomain/zone.py
index fd9f347..f79032f 100644
--- a/happydomain/zone.py
+++ b/happydomain/zone.py
@@ -10,7 +10,7 @@ class ZoneMeta:
         self._session = _session
         self._load(**kwargs)
 
-    def _load(self, id, id_author, default_ttl, last_modified="", commit_message=None, commit_date=None, published=None, parent=None):
+    def _load(self, id, id_author, default_ttl, last_modified="", commit_message=None, commit_date=None, published=None):
         self.id = id
         self.id_author = id_author
         self.default_ttl = default_ttl
@@ -18,7 +18,6 @@ class ZoneMeta:
         self.commit_message = commit_message
         self.commit_date = commit_date
         self.published = published
-        self.parent = parent
 
     def _dumps(self):
         return json.dumps({
@@ -29,7 +28,6 @@ class ZoneMeta:
             "commit_message": self.commit_message,
             "commit_date": self.commit_date,
             "published": self.published,
-            "parent": self.parent,
         })
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 54fe34a..fef4f6e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "happydomain"
-version = "0.4.0"
+version = "0.3.0"
 authors = [
   { name="happyDomain's team", email="contact+pypi@happydomain.org" },
 ]
diff --git a/setup.py b/setup.py
index 2c9ebd4..7f90624 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@ try:
 except ImportError:
     from distutils.core import setup
 
-version = "0.4.0"
+version = "0.3.0"
 
 setup(
     name = "happydomain",