diff --git a/lib/widgets/content/attachment_preview.dart b/lib/widgets/content/attachment_preview.dart
index 4920c693..28e771f3 100644
--- a/lib/widgets/content/attachment_preview.dart
+++ b/lib/widgets/content/attachment_preview.dart
@@ -392,7 +392,12 @@ class AttachmentPreview extends HookConsumerWidget {
                             ),
                             Gap(6),
                             Center(
-                              child: LinearProgressIndicator(value: progress),
+                              child: TweenAnimationBuilder<double>(
+                                tween: Tween<double>(begin: 0.0, end: progress),
+                                duration: const Duration(milliseconds: 300),
+                                curve: Curves.easeInOut,
+                                builder: (context, value, child) => LinearProgressIndicator(value: value),
+                              ),
                             ),
                           ],
                         ),
@@ -600,4 +605,4 @@ class AttachmentPreview extends HookConsumerWidget {
       child: contentWidget,
     );
   }
-}
+}
\ No newline at end of file