diff --git a/src/CloudGaming/Api/CloudGaming.Api/Dockerfile b/src/CloudGaming/Api/CloudGaming.Api/Dockerfile
index 12c06c2..e369fa9 100644
--- a/src/CloudGaming/Api/CloudGaming.Api/Dockerfile
+++ b/src/CloudGaming/Api/CloudGaming.Api/Dockerfile
@@ -2,6 +2,14 @@
 
 # 此阶段用于在快速模式(默认为调试配置)下从 VS 运行时
 FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
+
+# 设置时区为北京时间
+RUN apt-get update && apt-get install -y tzdata && \
+    ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && \
+    echo "Asia/Shanghai" > /etc/timezone && \
+    dpkg-reconfigure -f noninteractive tzdata && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
 USER $APP_UID
 WORKDIR /app
 EXPOSE 80
diff --git a/src/CloudGaming/Code/CloudGaming.Code/MiddlewareExtend/SignMiddleware.cs b/src/CloudGaming/Code/CloudGaming.Code/MiddlewareExtend/SignMiddleware.cs
index 595c8f5..4e81557 100644
--- a/src/CloudGaming/Code/CloudGaming.Code/MiddlewareExtend/SignMiddleware.cs
+++ b/src/CloudGaming/Code/CloudGaming.Code/MiddlewareExtend/SignMiddleware.cs
@@ -64,9 +64,9 @@ public class SignMiddleware
         var concatenatedValues = string.Join("", sortedKeys) + appConfig.TenantId.ToString("N");
 
         // 计算 MD5 哈希值
-        var md5Hash = MD5Encryption.ComputeMD5Hash(concatenatedValues);
+        var md5Hash = MD5Encryption.ComputeMD5Hash(concatenatedValues).ToLower();
         // 验证 MD5 哈希值与请求中的 sign 是否匹配
-        if (md5Hash != requestSign)
+        if (md5Hash != requestSign.ToLower())
         {
             var response = GetSignError(context);
             context.Response.ContentType = "application/json; charset=utf-8";