diff --git a/airflow/dags/mattermost_dags/transformation/deferred_merge.py b/airflow/dags/mattermost_dags/transformation/deferred_merge.py
index cf7c625a8..d25e9ec94 100644
--- a/airflow/dags/mattermost_dags/transformation/deferred_merge.py
+++ b/airflow/dags/mattermost_dags/transformation/deferred_merge.py
@@ -39,6 +39,7 @@
     "manual_deferred_merge",
     default_args=default_args,
     catchup=False,
+    schedule=None,  # Don't schedule this DAG, trigger manually
     max_active_runs=1,  # Don't allow multiple concurrent dag executions
     doc_md=doc_md,
 ) as dag: