diff --git a/internal/entities/reward.go b/internal/entities/reward.go
index 2254ff0..f05e417 100644
--- a/internal/entities/reward.go
+++ b/internal/entities/reward.go
@@ -1,6 +1,9 @@
 package entities
 
 import (
+	"database/sql/driver"
+	"encoding/json"
+	"fmt"
 	"time"
 
 	"github.com/google/uuid"
@@ -16,11 +19,67 @@ const (
 	RewardTypeBalance  RewardType = "BALANCE"
 )
 
+// StringSlice is a custom type for []string that implements sql.Scanner and driver.Valuer
+type StringSlice []string
+
+// Scan implements the sql.Scanner interface for StringSlice
+func (s *StringSlice) Scan(value interface{}) error {
+	if value == nil {
+		*s = StringSlice{}
+		return nil
+	}
+
+	var bytes []byte
+	switch v := value.(type) {
+	case []byte:
+		bytes = v
+	case string:
+		bytes = []byte(v)
+	default:
+		return fmt.Errorf("cannot scan %T into StringSlice", value)
+	}
+
+	return json.Unmarshal(bytes, s)
+}
+
+// Value implements the driver.Valuer interface for StringSlice
+func (s StringSlice) Value() (driver.Value, error) {
+	if s == nil {
+		return nil, nil
+	}
+	return json.Marshal(s)
+}
+
 type TermsAndConditions struct {
 	Sections   []TncSection `json:"sections"`
 	ExpiryDays int          `json:"expiry_days"`
 }
 
+// Scan implements the sql.Scanner interface for TermsAndConditions
+func (t *TermsAndConditions) Scan(value interface{}) error {
+	if value == nil {
+		*t = TermsAndConditions{}
+		return nil
+	}
+
+	var bytes []byte
+	switch v := value.(type) {
+	case []byte:
+		bytes = v
+	case string:
+		bytes = []byte(v)
+	default:
+		return fmt.Errorf("cannot scan %T into TermsAndConditions", value)
+	}
+
+	return json.Unmarshal(bytes, t)
+}
+
+// Value implements the driver.Valuer interface for TermsAndConditions
+func (t TermsAndConditions) Value() (driver.Value, error) {
+	return json.Marshal(t)
+}
+
 type TncSection struct {
 	Title string   `json:"title"`
 	Rules []string `json:"rules"`
@@ -35,7 +94,7 @@ type Reward struct {
 	MaxPerCustomer int                     `gorm:"type:int;default:1" json:"max_per_customer"`
 	Tnc            *TermsAndConditions     `gorm:"type:jsonb" json:"tnc,omitempty"`
 	Metadata       *map[string]interface{} `gorm:"type:jsonb" json:"metadata,omitempty"`
-	Images         *[]string               `gorm:"type:jsonb" json:"images,omitempty"`
+	Images         *StringSlice            `gorm:"type:jsonb" json:"images,omitempty"`
 	CreatedAt      time.Time               `gorm:"type:timestamp;default:now()" json:"created_at"`
 	UpdatedAt      time.Time               `gorm:"type:timestamp;default:now()" json:"updated_at"`
 }
diff --git a/internal/mappers/reward_mapper.go b/internal/mappers/reward_mapper.go
index 72c01f0..d908ab7 100644
--- a/internal/mappers/reward_mapper.go
+++ b/internal/mappers/reward_mapper.go
@@ -28,7 +28,8 @@ func ToRewardResponse(entity *entities.Reward) *models.RewardResponse {
 
 	var images *[]string
 	if entity.Images != nil {
-		images = entity.Images
+		imagesSlice := []string(*entity.Images)
+		images = &imagesSlice
 	}
 
 	return &models.RewardResponse{
@@ -66,9 +67,10 @@ func ToRewardEntity(request *contract.CreateRewardRequest) *entities.Reward {
 		}
 	}
 
-	var images *[]string
+	var images *entities.StringSlice
 	if request.Images != nil {
-		images = request.Images
+		stringSlice := entities.StringSlice(*request.Images)
+		images = &stringSlice
 	}
 
 	return &entities.Reward{
@@ -103,9 +105,10 @@ func ToRewardEntityFromUpdate(request *contract.UpdateRewardRequest) *entities.R
 		}
 	}
 
-	var images *[]string
+	var images *entities.StringSlice
 	if request.Images != nil {
-		images = request.Images
+		stringSlice := entities.StringSlice(*request.Images)
+		images = &stringSlice
 	}
 
 	return &entities.Reward{