diff --git a/docs/conf.py b/docs/conf.py
index 9cc02a8..4783f0f 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -61,9 +61,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = "0.1"
+version = "1.0"
 # The full version, including alpha/beta/rc tags.
-release = "0.1"
+release = "1.0.4"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/docs/img/schema.png b/docs/img/schema.png
index ee9ec67..aec7af3 100644
Binary files a/docs/img/schema.png and b/docs/img/schema.png differ
diff --git a/flask_combo_jsonapi/resource.py b/flask_combo_jsonapi/resource.py
index bacc4f8..58facab 100644
--- a/flask_combo_jsonapi/resource.py
+++ b/flask_combo_jsonapi/resource.py
@@ -188,7 +188,10 @@ def post(self, *args, **kwargs):
 
         obj = self.create_object(data, kwargs)
 
-        result = schema.dump(obj)
+        if obj is None:
+            result = {"data": None}
+        else:
+            result = schema.dump(obj)
 
         if result["data"].get("links", {}).get("self"):
             final_result = (result, 201, {"Location": result["data"]["links"]["self"]})
diff --git a/flask_combo_jsonapi/schema.py b/flask_combo_jsonapi/schema.py
index 02473b4..39ebca9 100644
--- a/flask_combo_jsonapi/schema.py
+++ b/flask_combo_jsonapi/schema.py
@@ -140,7 +140,7 @@ def get_related_schema(schema, field):
     :param field: the relationship field
     :return Schema: the related schema
     """
-    return schema._declared_fields[field].__dict__['_Relationship__schema']
+    return schema._declared_fields[field].schema
 
 
 def get_schema_from_type(resource_type):
diff --git a/setup.py b/setup.py
index 89789d0..5e0d2e5 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 import os
 from setuptools import setup, find_packages
 
-__version__ = "1.0.3"
+__version__ = "1.0.4"
 
 
 requirements_filepath = os.path.join(os.path.dirname(__name__), "requirements.txt")