diff --git a/ansible/roles/mastodon/files/docker-compose.yml b/ansible/roles/mastodon/files/docker-compose.yml
index 6e16537..536d8fd 100644
--- a/ansible/roles/mastodon/files/docker-compose.yml
+++ b/ansible/roles/mastodon/files/docker-compose.yml
@@ -21,6 +21,7 @@ services:
       - STREAMING_CLUSTER_NUM=1
       - WEB_CONCURRENCY=0  # 0 means 1, but not in clustered mode
       - SIDEKIQ_THREADS=1
+      - SIDEKIQ_CONCURRENCY=1
       - HTTP_PROXY={{ pve_hosts.qbittorrent.ip }}:3128
       - HTTPS_PROXY={{ pve_hosts.qbittorrent.ip }}:3128
     restart: unless-stopped