diff --git a/Tusker/Models/CompositionAttachment.swift b/Tusker/Models/CompositionAttachment.swift
index 0db4c3a7ae..30c41be326 100644
--- a/Tusker/Models/CompositionAttachment.swift
+++ b/Tusker/Models/CompositionAttachment.swift
@@ -8,7 +8,7 @@
 
 import Foundation
 import UIKit
-import MobileCoreServices
+import UniformTypeIdentifiers
 
 final class CompositionAttachment: NSObject, Codable, ObservableObject {
     static let typeIdentifier = "space.vaccor.Tusker.composition-attachment"
@@ -52,10 +52,10 @@ final class CompositionAttachment: NSObject, Codable, ObservableObject {
 
 extension CompositionAttachment: Identifiable {}
 
-private let imageType = kUTTypeImage as String
-private let mp4Type = kUTTypeMPEG4 as String
-private let quickTimeType = kUTTypeQuickTimeMovie as String
-private let dataType = kUTTypeData as String
+private let imageType = UTType.image.identifier
+private let mp4Type = UTType.mpeg4Movie.identifier
+private let quickTimeType = UTType.quickTimeMovie.identifier
+private let dataType = UTType.data.identifier
 
 extension CompositionAttachment: NSItemProviderWriting {
     static var writableTypeIdentifiersForItemProvider: [String] {
@@ -100,11 +100,11 @@ extension CompositionAttachment: NSItemProviderReading {
             return try PropertyListDecoder().decode(Self.self, from: data)
         } else if UIImage.readableTypeIdentifiersForItemProvider.contains(typeIdentifier), let image = try? UIImage.object(withItemProviderData: data, typeIdentifier: typeIdentifier) {
             return CompositionAttachment(data: .image(image)) as! Self
-        } else if typeIdentifier == mp4Type || typeIdentifier == quickTimeType {
+        } else if let type = UTType(typeIdentifier), type == .mpeg4Movie || type == .quickTimeMovie {
             let temporaryDirectoryURL = URL(fileURLWithPath: NSTemporaryDirectory(), isDirectory: true)
             let temporaryFileName = ProcessInfo().globallyUniqueString
-            let fileExt = UTTypeCopyPreferredTagWithClass(typeIdentifier as CFString, kUTTagClassFilenameExtension)!
-            let temporaryFileURL = temporaryDirectoryURL.appendingPathComponent(temporaryFileName).appendingPathExtension(fileExt.takeUnretainedValue() as String)
+            let fileExt = type.preferredFilenameExtension!
+            let temporaryFileURL = temporaryDirectoryURL.appendingPathComponent(temporaryFileName).appendingPathExtension(fileExt)
             try data.write(to: temporaryFileURL)
             return CompositionAttachment(data: .video(temporaryFileURL)) as! Self
         } else if NSURL.readableTypeIdentifiersForItemProvider.contains(typeIdentifier), let url = try? NSURL.object(withItemProviderData: data, typeIdentifier: typeIdentifier) as URL {
diff --git a/Tusker/Models/CompositionAttachmentData.swift b/Tusker/Models/CompositionAttachmentData.swift
index 3f5fa6dc88..ab11fd686f 100644
--- a/Tusker/Models/CompositionAttachmentData.swift
+++ b/Tusker/Models/CompositionAttachmentData.swift
@@ -8,7 +8,7 @@
 
 import UIKit
 import Photos
-import MobileCoreServices
+import UniformTypeIdentifiers
 import PencilKit
 
 enum CompositionAttachmentData {
@@ -74,7 +74,7 @@ enum CompositionAttachmentData {
                         data = context.jpegRepresentation(of: image, colorSpace: colorSpace, options: [:])!
                         mimeType = "image/jpeg"
                     } else {
-                        mimeType = UTTypeCopyPreferredTagWithClass(dataUTI as CFString, kUTTagClassMIMEType)!.takeRetainedValue() as String
+                        mimeType = UTType(dataUTI)!.preferredMIMEType!
                     }
     
                     completion(data, mimeType)