diff --git a/internal/dto/schedule_dto.go b/internal/dto/schedule_dto.go
index d51da31..3bef9e6 100644
--- a/internal/dto/schedule_dto.go
+++ b/internal/dto/schedule_dto.go
@@ -5,7 +5,7 @@ type ScheduleCourseResponse struct {
 	Name         string `json:"name"`
 	Teacher      string `json:"teacher,omitempty"`
 	Location     string `json:"location,omitempty"`
-	DayOfWeek    int    `json:"day_of_week,omitzero"`
+	DayOfWeek    int    `json:"day_of_week"`
 	StartSection int    `json:"start_section,omitzero"`
 	EndSection   int    `json:"end_section,omitzero"`
 	Weeks        []int  `json:"weeks"`