diff --git a/src/core/setup_arq.py b/src/core/setup_arq.py
index b17a230..58d7642 100644
--- a/src/core/setup_arq.py
+++ b/src/core/setup_arq.py
@@ -12,6 +12,6 @@ class WorkerSettings:
     functions = [update, update_books, update_authors, update_sequences]
     on_startup = startup
     redis_settings = get_redis_settings()
-    max_jobs = 3
+    max_jobs = 1
     job_timeout = 15 * 60
     cron_jobs = [cron(update, hour={6}, minute=0)]