diff --git a/Model/PreviewModel.swift b/Model/PreviewModel.swift
index 820c271..b3ef934 100644
--- a/Model/PreviewModel.swift
+++ b/Model/PreviewModel.swift
@@ -12,7 +12,6 @@ import UIKit
 class PreviewModel: NSObject {
     var title: String?
     var body: String?
-    var category: String?
     var notice: String?
     var queryParameter: String?
     var image: UIImage?
@@ -21,7 +20,6 @@ class PreviewModel: NSObject {
 
     init(title: String? = nil,
          body: String? = nil,
-         category: String? = nil,
          notice: String? = nil,
          queryParameter: String? = nil,
          image: UIImage? = nil,
@@ -30,7 +28,6 @@ class PreviewModel: NSObject {
     {
         self.title = title
         self.body = body
-        self.category = category
         self.notice = notice
         self.queryParameter = queryParameter
         self.image = image
diff --git a/docs/tr/apns.md b/docs/tr/apns.md
index dad8e12..fa3b1e3 100644
--- a/docs/tr/apns.md
+++ b/docs/tr/apns.md
@@ -47,7 +47,7 @@ Bknz. https://developer.apple.com/documentation/usernotifications/setting_up_a_r
             "title" : "Başlık",
             "body": "İçerik"
         },
-        "category": "bildirimGrubu",
+        "category": "myNotificationCategory",
         "sound": "minuet.caf"
     },
     "icon": "https://day.app/assets/images/avatar.jpg"
diff --git a/docs/tr/tutorial.md b/docs/tr/tutorial.md
index c370c42..ef56db5 100644
--- a/docs/tr/tutorial.md
+++ b/docs/tr/tutorial.md
@@ -34,7 +34,6 @@ curl -X "POST" "https://api.day.app/your_key" \
   "body": "Test Bark Server",
   "title": "Test Başlık",
   "badge": 1,
-  "category": "benimBildirimGrubum",
   "sound": "minuet.caf",
   "icon": "https://day.app/assets/images/avatar.jpg",
   "group": "test",
diff --git a/docs/tutorial.md b/docs/tutorial.md
index bcd9740..279bffd 100644
--- a/docs/tutorial.md
+++ b/docs/tutorial.md
@@ -35,7 +35,6 @@ curl -X "POST" "https://api.day.app/your_key" \
   "body": "Test Bark Server",
   "title": "Test Title",
   "badge": 1,
-  "category": "myNotificationCategory",
   "sound": "minuet.caf",
   "icon": "https://day.app/assets/images/avatar.jpg",
   "group": "test",