diff --git a/gate_order_executor/requirements.txt b/gate_order_executor/requirements.txt
index e0c6a8d..91f3cea 100644
--- a/gate_order_executor/requirements.txt
+++ b/gate_order_executor/requirements.txt
@@ -3,6 +3,8 @@ uvicorn[standard]>=0.27,<1
 httpx>=0.27,<1
 # 使用 SOCKS 代理时再装：pip install socksio（与扫描端 httpx[socks] 一致）
 pydantic>=2.6,<3
+# Python 3.9：Pydantic 解析 `float | None` 等 3.10 联合类型注解时需要
+eval-type-backport>=0.2,<1
 PyYAML>=6.0,<7
 jinja2>=3.1,<4
 itsdangerous>=2.2,<3