diff --git a/admin-server/gateway.go b/admin-server/gateway.go
index 432aa16..497c550 100644
--- a/admin-server/gateway.go
+++ b/admin-server/gateway.go
@@ -169,7 +169,7 @@ func nginxQuote(s string) string {
 
 func writeTLS(b *strings.Builder, cfg *GatewayConfig) {
 	fmt.Fprintf(b, "    ssl_certificate %s;\n    ssl_certificate_key %s;\n", nginxQuote(cfg.CertFile), nginxQuote(cfg.KeyFile))
-	b.WriteString("    ssl_protocols TLSv1.2 TLSv1.3;\n    http2 on;\n")
+	b.WriteString("    ssl_protocols TLSv1.2 TLSv1.3;\n")
 }
 
 func writeListeners(b *strings.Builder, cfg *GatewayConfig, defaultServer bool) {
@@ -178,9 +178,11 @@ func writeListeners(b *strings.Builder, cfg *GatewayConfig, defaultServer bool)
 		suffix = " default_server"
 	}
 	if cfg.ListenHTTPS {
-		fmt.Fprintf(b, "    listen %d ssl%s;\n", cfg.ListenPort, suffix)
+		// 注意：http2 只能作为 listen 的参数写。容器里是 nginx 1.22，
+		// 独立的 `http2 on;` 会直接报 unknown directive（本轮实测踩到）。
+		fmt.Fprintf(b, "    listen %d ssl http2%s;\n", cfg.ListenPort, suffix)
 		if cfg.ListenTLSPort > 0 && cfg.ListenTLSPort != cfg.ListenPort {
-			fmt.Fprintf(b, "    listen %d ssl%s;\n", cfg.ListenTLSPort, suffix)
+			fmt.Fprintf(b, "    listen %d ssl http2%s;\n", cfg.ListenTLSPort, suffix)
 		}
 		return
 	}
diff --git a/admin-server/gateway_test.go b/admin-server/gateway_test.go
index dc9ca6b..8757f04 100644
--- a/admin-server/gateway_test.go
+++ b/admin-server/gateway_test.go
@@ -314,3 +314,24 @@ func TestRenderGatewayConfAuthKind(t *testing.T) {
 		t.Fatalf("生成了空的 proxy_pass:\n%s", out)
 	}
 }
+
+// TLS 段不得使用 nginx 1.22 不认识的 `http2 on;`，必须写成 listen 参数。
+func TestRenderGatewayConfTLSHttp2Compatible(t *testing.T) {
+	out, err := RenderGatewayConf(&GatewayConfig{
+		ListenHTTPS: true, ListenPort: 18443, ListenTLSPort: 18443,
+		CertFile: "/c/fullchain.pem", KeyFile: "/c/privkey.pem",
+		Routes: []Route{{Host: "a.com", Upstream: "http://a"}},
+	})
+	if err != nil {
+		t.Fatalf("渲染失败: %v", err)
+	}
+	if contains(out, "http2 on;") {
+		t.Fatalf("不得输出 `http2 on;`（nginx 1.22 不支持）:\n%s", out)
+	}
+	if !contains(out, "listen 18443 ssl http2;") {
+		t.Fatalf("TLS 监听应带 http2 参数:\n%s", out)
+	}
+	if !contains(out, "ssl_certificate '/c/fullchain.pem';") {
+		t.Fatalf("证书路径未写入")
+	}
+}