diff --git a/tf/alb.tf b/tf/alb.tf
index d674f8b..dc2c44f 100644
--- a/tf/alb.tf
+++ b/tf/alb.tf
@@ -30,6 +30,7 @@ resource "aws_lb" "server" {
   name = "riju-server"
   security_groups = [aws_security_group.alb.id]
   subnets = data.aws_subnet_ids.default.ids
+  idle_timeout = 3600
 }
 
 resource "aws_lb_target_group" "server" {