diff --git a/internal/db/models/http_firewall_policy_dao.go b/internal/db/models/http_firewall_policy_dao.go
index 4594eb1a..400387a2 100644
--- a/internal/db/models/http_firewall_policy_dao.go
+++ b/internal/db/models/http_firewall_policy_dao.go
@@ -133,12 +133,7 @@ func (this *HTTPFirewallPolicyDAO) CreateFirewallPolicy(tx *dbs.Tx, userId int64
 	op.UseLocalFirewall = true
 
 	{
-		synFloodJSON, err := json.Marshal(&firewallconfigs.SYNFloodConfig{
-			IsOn:           true,
-			MinAttempts:    10,
-			TimeoutSeconds: 600,
-			IgnoreLocal:    true,
-		})
+		synFloodJSON, err := json.Marshal(firewallconfigs.DefaultSYNFloodConfig())
 		if err != nil {
 			return 0, err
 		}
diff --git a/internal/setup/sql_upgrade.go b/internal/setup/sql_upgrade.go
index a8d5c201..fa147335 100644
--- a/internal/setup/sql_upgrade.go
+++ b/internal/setup/sql_upgrade.go
@@ -62,6 +62,9 @@ var upgradeFuncs = []*upgradeVersion{
 	{
 		"0.3.7", upgradeV0_3_7,
 	},
+	{
+		"0.4.0", upgradeV0_4_0,
+	},
 }
 
 // UpgradeSQLData 升级SQL数据
@@ -552,3 +555,17 @@ func upgradeV0_3_7(db *dbs.DB) error {
 
 	return nil
 }
+
+// v0.4.0
+func upgradeV0_4_0(db *dbs.DB) error {
+	// 升级SYN Flood配置
+	synFloodJSON, err := json.Marshal(firewallconfigs.DefaultSYNFloodConfig())
+	if err == nil {
+		_, err := db.Exec("UPDATE edgeHTTPFirewallPolicies SET synFlood=? WHERE synFlood IS NULL AND state=1", string(synFloodJSON))
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
diff --git a/internal/setup/sql_upgrade_test.go b/internal/setup/sql_upgrade_test.go
index 5f01388b..ded0d4d5 100644
--- a/internal/setup/sql_upgrade_test.go
+++ b/internal/setup/sql_upgrade_test.go
@@ -84,3 +84,20 @@ func TestUpgradeSQLData_v0_3_7(t *testing.T) {
 	}
 	t.Log("ok")
 }
+
+
+func TestUpgradeSQLData_v0_4_0(t *testing.T) {
+	db, err := dbs.NewInstanceFromConfig(&dbs.DBConfig{
+		Driver: "mysql",
+		Dsn:    "root:123456@tcp(127.0.0.1:3306)/db_edge?charset=utf8mb4&timeout=30s",
+		Prefix: "edge",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = upgradeV0_4_0(db)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Log("ok")
+}