diff --git a/pkg/errors/handler.go b/pkg/errors/handler.go
index a188ada..5b56733 100644
--- a/pkg/errors/handler.go
+++ b/pkg/errors/handler.go
@@ -111,12 +111,14 @@ func handleError(c *fiber.Ctx, err error, logger *zap.Logger) error {
 	}
 
 	// 6. 返回统一 JSON 响应
-	return c.Status(httpStatus).JSON(fiber.Map{
+	errResp := c.Status(httpStatus).JSON(fiber.Map{
 		"code":      code,
 		"data":      nil,
 		"msg":       message,
 		"timestamp": time.Now().Format(time.RFC3339),
 	})
+	c.Set(fiber.HeaderContentType, "application/json; charset=utf-8")
+	return errResp
 }
 
 // safeLog 安全地记录日志，日志失败时静默处理（默认 Error 级别）
diff --git a/pkg/response/response.go b/pkg/response/response.go
index 76876e6..88d8525 100644
--- a/pkg/response/response.go
+++ b/pkg/response/response.go
@@ -17,22 +17,26 @@ type Response struct {
 
 // Success 返回成功响应
 func Success(c *fiber.Ctx, data any) error {
-	return c.JSON(Response{
+	err := c.JSON(Response{
 		Code:      errors.CodeSuccess,
 		Data:      data,
 		Message:   "success",
 		Timestamp: time.Now().Format(time.RFC3339),
 	})
+	c.Set(fiber.HeaderContentType, "application/json; charset=utf-8")
+	return err
 }
 
 // SuccessWithMessage 返回带自定义消息的成功响应
 func SuccessWithMessage(c *fiber.Ctx, data any, message string) error {
-	return c.JSON(Response{
+	err := c.JSON(Response{
 		Code:      errors.CodeSuccess,
 		Data:      data,
 		Message:   message,
 		Timestamp: time.Now().Format(time.RFC3339),
 	})
+	c.Set(fiber.HeaderContentType, "application/json; charset=utf-8")
+	return err
 }
 
 // PaginationData 分页数据结构
@@ -45,7 +49,7 @@ type PaginationData struct {
 
 // SuccessWithPagination 返回分页响应
 func SuccessWithPagination(c *fiber.Ctx, items any, total int64, page, size int) error {
-	return c.JSON(Response{
+	err := c.JSON(Response{
 		Code: errors.CodeSuccess,
 		Data: PaginationData{
 			Items: items,
@@ -56,4 +60,6 @@ func SuccessWithPagination(c *fiber.Ctx, items any, total int64, page, size int)
 		Message:   "success",
 		Timestamp: time.Now().Format(time.RFC3339),
 	})
+	c.Set(fiber.HeaderContentType, "application/json; charset=utf-8")
+	return err
 }