diff --git a/app/api/views/download/repositories.py b/app/api/views/download/repositories.py
index 82d25ac8..e4ccbef4 100644
--- a/app/api/views/download/repositories.py
+++ b/app/api/views/download/repositories.py
@@ -1,6 +1,7 @@
 import abc
+import itertools
 from collections import defaultdict
-from typing import Dict, Iterator
+from typing import Dict, Iterator, List
 
 from ...models import Project
 from .data import Record
@@ -29,6 +30,8 @@ class TextRepository(BaseRepository):
 
         for doc in docs:
             label_per_user = self.label_per_user(doc)
+            if self.project.collaborative_annotation:
+                label_per_user = self.reduce_user(label_per_user)
             for user, label in label_per_user.items():
                 yield Record(
                     id=doc.id,
@@ -42,6 +45,10 @@ class TextRepository(BaseRepository):
     def label_per_user(self, doc) -> Dict:
         raise NotImplementedError()
 
+    def reduce_user(self, label_per_user: Dict[str, List]):
+        value = list(itertools.chain(*label_per_user.values()))
+        return {'all': value}
+
 
 class TextClassificationRepository(TextRepository):