diff --git a/rero_ils/modules/libraries/api.py b/rero_ils/modules/libraries/api.py
index 4aed092b24..748f9d5cd8 100644
--- a/rero_ils/modules/libraries/api.py
+++ b/rero_ils/modules/libraries/api.py
@@ -64,9 +64,8 @@ def get_libraries_by_organisation_pid(self, org_pid, fields=None):
         query = self.filter('term', organisation__pid=org_pid)
         if fields:
             query = query.source(includes=fields)
-        response = query.execute()
-        for hit in response.hits.hits:
-            yield hit._source
+        for result in query.scan():
+            yield result
 
 
 class Library(IlsRecord):