diff --git a/entities.go b/entities.go
index 0427978..c77b4a0 100644
--- a/entities.go
+++ b/entities.go
@@ -8,9 +8,9 @@ import (
 
 // EntityBase contains common columns for all tables.
 type EntityBase struct {
-	ID        uuid.UUID `gorm:"type:uuid;primary_key;"`
-	CreatedAt time.Time
-	UpdatedAt *time.Time
+	ID        uuid.UUID  `gorm:"type:uuid;primary_key;" json:"id"`
+	CreatedAt time.Time  `json:"created_at"`
+	UpdatedAt *time.Time `json:"updated_at"`
 	//DeletedAt *time.Time
 }