diff --git a/pkg/serverconfigs/firewallconfigs/http_firewall_policy.go b/pkg/serverconfigs/firewallconfigs/http_firewall_policy.go
index 4b446fa..7b13eae 100644
--- a/pkg/serverconfigs/firewallconfigs/http_firewall_policy.go
+++ b/pkg/serverconfigs/firewallconfigs/http_firewall_policy.go
@@ -2,7 +2,7 @@ package firewallconfigs
 
 import "encoding/json"
 
-const DefaultMaxRequestBodySize int64 = 512 << 10
+const DefaultMaxRequestBodySize int64 = 256 << 10
 
 // HTTPFirewallPolicy 防火墙策略
 type HTTPFirewallPolicy struct {