diff --git a/infra/airflow/docker-compose.yaml b/infra/airflow/docker-compose.yaml
index e196b407..396582f2 100644
--- a/infra/airflow/docker-compose.yaml
+++ b/infra/airflow/docker-compose.yaml
@@ -57,6 +57,7 @@ x-airflow-common:
     AIRFLOW__CELERY__RESULT_BACKEND: db+postgresql://${AIRFLOW_POSTGRES_USER}:${AIRFLOW_POSTGRES_PASSWORD}@postgres/${AIRFLOW_POSTGRES_DB_NAME}
     AIRFLOW__CELERY__BROKER_URL: redis://:@redis:6379/0
     AIRFLOW__CORE__FERNET_KEY: ''
+    AIRFLOW__CELERY__WORKER_CONCURRENCY: 1
     AIRFLOW__CORE__DAGS_ARE_PAUSED_AT_CREATION: 'true'
     AIRFLOW__CORE__ENABLE_XCOM_PICKLING: "true"
     AIRFLOW__CORE__LOAD_EXAMPLES: 'false'