diff --git a/src/models/sheet.go b/src/models/sheet.go
index f9cc182..cafda47 100644
--- a/src/models/sheet.go
+++ b/src/models/sheet.go
@@ -10,13 +10,13 @@ import (
 type Sheet struct {
 	Uuid        uuid.UUID      `json:"uuid" gorm:"type:uuid;primaryKey"`
 	Title       string         `json:"title" gorm:"not null"`
-	Description string         `json:"description"`
-	FilePath    string         `json:"file_path" gorm:"not null"`
-	FileSize    int64          `json:"file_size"`
-	FileHash    string         `json:"file_hash"`
+	Description string         `json:"-"`
+	FilePath    string         `json:"-" gorm:"not null"`
+	FileSize    int64          `json:"-"`
+	FileHash    string         `json:"-"`
 	Composer    string         `json:"composer"`
-	CreatedAt   time.Time      `json:"created_at"`
+	CreatedAt   time.Time      `json:"-"`
 	UpdatedAt   time.Time      `json:"updated_at"`
 	DeletedAt   gorm.DeletedAt `json:"-" gorm:"index"`
-	Annotations string         `json:"annotations"`
+	Annotations string         `json:"-"`
 }