diff --git a/lib/Models/CoreTypes/object.dart b/lib/Models/CoreTypes/object.dart
index 3d3db3a..0766033 100644
--- a/lib/Models/CoreTypes/object.dart
+++ b/lib/Models/CoreTypes/object.dart
@@ -1,3 +1,11 @@
 class ActivityPubObject {
-  List<ActivityPubObject>? attachments;
+  final List<ActivityPubObject>? attachment;
+  final String? content;
+  final String? attributedTo;
+
+  ActivityPubObject(
+    this.attachment,
+    this.content,
+    this.attributedTo,
+  );
 }
diff --git a/lib/Models/ObjectTypes/document.dart b/lib/Models/ObjectTypes/document.dart
index 1ea2cdb..599502e 100644
--- a/lib/Models/ObjectTypes/document.dart
+++ b/lib/Models/ObjectTypes/document.dart
@@ -13,12 +13,21 @@ class Document extends ActivityPubObject {
     this.mediaType,
     this.context,
     this.url,
-  );
+  ) : super(
+          null,
+          null,
+          null,
+        );
 
   Document.fromJson(Map<String, dynamic> json)
       : type = json["type"],
         mediaType = json["mediaType"],
         url = Uri.tryParse(json["url"]),
         name = json["name"],
-        context = json["@context"];
+        context = json["@context"],
+        super(
+          null,
+          null,
+          null,
+        );
 }
diff --git a/lib/Models/post.dart b/lib/Models/post.dart
index 80c533d..8d24ae8 100644
--- a/lib/Models/post.dart
+++ b/lib/Models/post.dart
@@ -9,13 +9,10 @@ class Post extends ActivityPubObject {
   final String? summary;
   final bool? sensitive;
   final String? inReplyTo;
-  final String content;
   final String id;
   final String type;
   final DateTime published;
-  final String attributedTo;
   final Collection? replies;
-  final List<Document>? attachment;
 
   Post(
     this.to,
@@ -23,14 +20,18 @@ class Post extends ActivityPubObject {
     this.summary,
     this.sensitive,
     this.inReplyTo,
-    this.content,
+    content,
     this.id,
     this.type,
     this.published,
-    this.attributedTo,
+    attributedTo,
     this.replies,
-    this.attachment,
-  );
+    attachment,
+  ) : super(
+          attachment,
+          content,
+          attributedTo,
+        );
 
   Post.fromJson(Map<String, dynamic> json)
       : to = convertToStringList(json["to"]),
@@ -38,15 +39,17 @@ class Post extends ActivityPubObject {
         summary = json["summary"],
         sensitive = json["sensitive"],
         inReplyTo = json["inReplyTo"],
-        content = json["content"],
         id = json["id"],
         type = json["type"],
         published = DateTime.parse(json["published"]),
-        attributedTo = json["attributedTo"],
-        attachment = toListOfDocuments(json["attachment"]),
         replies = json["replies"] == null
             ? null
-            : Collection.fromJson(json["replies"]);
+            : Collection.fromJson(json["replies"]),
+        super(
+          json["attachment"],
+          json["content"],
+          json["attributedTo"],
+        );
 
   static List<String> convertToStringList(json) {
     List<String> jsonList = [];
diff --git a/pubspec.yaml b/pubspec.yaml
index 737fa57..4276907 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: activitypub
 description: A library for the ActivityPub standard. Created an also used by Fedodo.
-version: 1.2.4
+version: 1.2.5
 repository: https://github.com/Fedodo/Fedodo.Pub.ActivityPub
 
 environment: