diff --git a/conf.d/mastodon b/conf.d/mastodon
index d2ab0a8..e27516c 100644
--- a/conf.d/mastodon
+++ b/conf.d/mastodon
@@ -12,6 +12,6 @@ SIDEKIQ_WORKERS=5
 WEB_BIND=127.0.0.1
 WEB_PORT=3000
 # should be 0 (single process) or >1
-WEB_CONCURRENCY=1
+WEB_CONCURRENCY=0
 WEB_MAX_THREADS=2