diff --git a/lib/screens/manage_collection_screen.dart b/lib/screens/manage_collection_screen.dart
index 5119ce7..faa93b1 100644
--- a/lib/screens/manage_collection_screen.dart
+++ b/lib/screens/manage_collection_screen.dart
@@ -86,17 +86,21 @@ class _ManageCollectionScreenState extends State<ManageCollectionScreen> {
 
     if (result != true) return;
 
+    final trimmedDesc = descCtrl.text.trim();
+    final String? description =
+        trimmedDesc.isEmpty ? null : trimmedDesc;
+
     try {
       await CollectionService.update(
         collectionId: _collection.id,
         name: ctrl.text.trim(),
-        description: descCtrl.text.trim(),
+        description: description,
       );
       setState(() {
         _collection = Collection(
           id: _collection.id,
           name: ctrl.text.trim(),
-          description: descCtrl.text.trim(),
+          description: description,
           ownerId: _collection.ownerId,
           createdAt: _collection.createdAt,
           role: _collection.role,