diff --git a/opencti-worker/src/worker.py b/opencti-worker/src/worker.py
index 2678248237cc..5d5578a979ef 100644
--- a/opencti-worker/src/worker.py
+++ b/opencti-worker/src/worker.py
@@ -70,20 +70,21 @@ def data_handler(self, connection, channel, delivery_tag, data):
             content = base64.b64decode(data['content']).decode('utf-8')
             types = data['entities_types'] if 'entities_types' in data else []
             imported_data = self.api.stix2_import_bundle(content, True, types)
-            cb = functools.partial(self.ack_message, channel, delivery_tag)
-            connection.add_callback_threadsafe(cb)
-
             if job_id is not None:
                 messages = []
                 by_types = groupby(imported_data, key=lambda x: x['type'])
                 for key, grp in by_types:
                     messages.append(str(len(list(grp))) + ' imported ' + key)
                 self.api.job.update_job(job_id, 'complete', messages)
+            cb = functools.partial(self.ack_message, channel, delivery_tag)
+            connection.add_callback_threadsafe(cb)
+            return True
         except RequestException as re:
             logging.error('A connection error occurred: { ' + str(re) + ' }')
             logging.info('Message (delivery_tag=' + str(delivery_tag) + ') NOT acknowledged')
             cb = functools.partial(self.stop_consume, channel)
             connection.add_callback_threadsafe(cb)
+            return False
         except Exception as e:
             logging.error('An unexpected error occurred: { ' + str(e) + ' }')
             cb = functools.partial(self.ack_message, channel, delivery_tag)