diff --git a/client/js/views/post_upload_view.js b/client/js/views/post_upload_view.js
index 8c506a8..a65067a 100644
--- a/client/js/views/post_upload_view.js
+++ b/client/js/views/post_upload_view.js
@@ -159,7 +159,7 @@ class PostUploadView extends events.EventTarget {
             this._contentInputNode,
             {
                 extraText:
-                    "Allowed extensions: .jpg, .png, .gif, .webm, .mp4, .swf",
+                    "Allowed extensions: .jpg, .png, .gif, .webm, .mp4, .swf, .avif, .heif, .heic",
                 allowUrls: true,
                 allowMultiple: true,
                 lock: false,