diff --git a/apps/server/src/entities/deposit.entity.ts b/apps/server/src/entities/deposit.entity.ts
index 5423b77..b73ef49 100644
--- a/apps/server/src/entities/deposit.entity.ts
+++ b/apps/server/src/entities/deposit.entity.ts
@@ -47,16 +47,16 @@ export class Deposit {
   recordedBy: number;
 
   @Column({ name: 'refund_status', length: 30, nullable: true })
-  refundStatus: string | null; // pending | head_teacher_approved | finance_approved | refunded
+  refundStatus: string; // pending | head_teacher_approved | finance_approved | refunded
 
   @Column({ name: 'refund_requested_at', type: 'datetime', nullable: true })
-  refundRequestedAt: Date | null;
+  refundRequestedAt: Date;
 
   @Column({ name: 'refund_approved_by', type: 'integer', nullable: true })
-  refundApprovedBy: number | null;
+  refundApprovedBy: number;
 
   @Column({ name: 'refund_approved_at', type: 'datetime', nullable: true })
-  refundApprovedAt: Date | null;
+  refundApprovedAt: Date;
 
   @OneToMany(() => DepositInstallment, (i) => i.deposit, { cascade: true, eager: true })
   installments: DepositInstallment[];