diff --git a/config/unicorn/production.rb b/config/unicorn/production.rb
index e53d8a24f..7ac586706 100644
--- a/config/unicorn/production.rb
+++ b/config/unicorn/production.rb
@@ -6,7 +6,7 @@ worker_processes 20
 
 timeout 180
 # listen "127.0.0.1:9000", :tcp_nopush => true
-listen "/tmp/.unicorn.sock", :backlog => 512
+listen "/tmp/.unicorn.sock", backlog: 1024
 
 # Spawn unicorn master worker for user apps (group: apps)
 user 'danbooru', 'danbooru'