@@ -5,6 +5,7 @@
 ### Bug Fixes
 
 -   Declare `react-dom` and `@types/react-dom` as peer dependencies, forwarding the peers of `@wordpress/element`, so strict package managers such as Yarn PnP can resolve them ([#83765](https://github.com/WordPress/gutenberg/pull/83765)).
+-   `MediaUpload`: Fix `allowedTypes` being ignored when `gallery` prop is `true` ([#78257](https://github.com/WordPress/gutenberg/pull/78257)).
 
 ## 5.56.0 (2026-09-23)
 
 
@@ -350,6 +350,7 @@ class MediaUpload extends Component {
 			multiple,
 			selection,
 			editing: !! value?.length,
+			...( allowedTypes && { library: { type: allowedTypes } } ),
 		} );
 		wp.media.frame = this.frame;
 		this.initializeListeners();