diff --git a/lib/actions/upload-actions.js b/lib/actions/upload-actions.js
--- a/lib/actions/upload-actions.js
+++ b/lib/actions/upload-actions.js
@@ -3,7 +3,6 @@
 import uuid from 'uuid';
 
 import blobService from '../facts/blob-service.js';
-import type { Shape } from '../types/core.js';
 import type { UploadMultimediaResult, Dimensions } from '../types/media-types';
 import { extractKeyserverIDFromID } from '../utils/action-utils.js';
 import { toBase64URL } from '../utils/base64.js';
@@ -19,19 +18,21 @@
 import { handleHTTPResponseError } from '../utils/services-utils.js';
 import { type UploadBlob } from '../utils/upload-blob.js';
 
-export type MultimediaUploadCallbacks = Shape<{
-  onProgress: (percent: number) => void,
-  abortHandler: (abort: () => void) => void,
-  uploadBlob: UploadBlob,
-  blobServiceUploadHandler: BlobServiceUploadHandler,
-  timeout: ?number,
-}>;
-export type MultimediaUploadExtras = Shape<{
-  ...Dimensions,
-  loop: boolean,
-  encryptionKey: string,
-  thumbHash: ?string,
+export type MultimediaUploadCallbacks = Partial<{
+  +onProgress: (percent: number) => void,
+  +abortHandler: (abort: () => void) => void,
+  +uploadBlob: UploadBlob,
+  +blobServiceUploadHandler: BlobServiceUploadHandler,
+  +timeout: ?number,
 }>;
+export type MultimediaUploadExtras = $ReadOnly<
+  Partial<{
+    ...Dimensions,
+    +loop: boolean,
+    +encryptionKey: string,
+    +thumbHash: ?string,
+  }>,
+>;
 
 const uploadMultimedia =
   (