diff --git a/backend/typescript/models/pet.model.ts b/backend/typescript/models/pet.model.ts
index ebae9cb..e6b57d1 100644
--- a/backend/typescript/models/pet.model.ts
+++ b/backend/typescript/models/pet.model.ts
@@ -5,6 +5,7 @@ import {
   DataType,
   ForeignKey,
   BelongsTo,
+  PrimaryKey,
 } from "sequelize-typescript";
 import Animal_Type from "./animal_type.model";
 // import { PetCareInfo } from "./PetCareInfo"
@@ -13,6 +14,7 @@ import { Letters } from "../types";
 
 @Table({ timestamps: false, tableName: "pet" })
 export default class Pet extends Model {
+  @PrimaryKey
   @Column({ type: DataType.INTEGER })
   id!: number;