diff --git a/src/services/mysql.service.ts b/src/services/mysql.service.ts
index 56e60a4..07c919f 100644
--- a/src/services/mysql.service.ts
+++ b/src/services/mysql.service.ts
@@ -271,7 +271,15 @@ const MySqlService = {
 		}
 	},
 	Brand: {
-		insert(handler: MysqlHandler, data: IDbBrand) {
+		/**
+		 * Inserts a record into the `brands` table.
+		 *
+		 * @param {MysqlHandler} handler - The MySQL handler instance.
+		 * @param {IDbBrand} data - The data object representing the record to be inserted.
+		 * @returns {Promise} A promise that resolves with the result of the insertion.
+		 *                    The promise is rejected with an error if the insertion fails.
+		 */
+		insert(handler: MysqlHandler, data: IDbBrand): Promise<unknown> {
 			return new Promise((resolve, reject) => {
 				if (!data.id) return reject('Id is undefined');
 				if (data.id.length !== 36) return reject('Id invalid');
@@ -290,7 +298,14 @@ const MySqlService = {
 				}
 			})
 		},
-		update(handler: MysqlHandler, data: IDbBrand) {
+		/**
+		 * Updates a brand in the database.
+		 * @param {MysqlHandler} handler - The MySQL handler.
+		 * @param {IDbBrand} data - The brand data to be updated.
+		 * @returns {Promise<number>} - A promise that resolves with the number of affected rows in the database.
+		 * @throws {Error} - If an error occurs during the update process.
+		 */
+		update(handler: MysqlHandler, data: IDbBrand): Promise<number> {
 			return new Promise((resolve, reject) => {
 				if (!data.id) return reject('Id is undefined');
 				if (data.id.length !== 36) return reject('Id invalid');
@@ -308,7 +323,7 @@ const MySqlService = {
 						data.id
 					]
 					const _sql = `UPDATE "brands" SET ${_template} WHERE 'id' = ?`;
-					return resolve(handler.execute(_sql, _values));
+					return resolve(handler.execute(_sql, _values) as unknown as number);
 
 				} catch (err: unknown) {
 					reject(err as Error);
@@ -423,7 +438,7 @@ const MySqlService = {
 		 *
 		 * @param {MysqlHandler} handler - The MySQL handler instance.
 		 * @param {IDbCategory} data - The category data to update.
-		 * @returns {Promise<unknown>} - A Promise that resolves with the result of the UPDATE query execution.
+		 * @returns {Promise<number>} - A promise that resolves with the number of affected rows in the database.
 		 * @throws {Error} - If an error occurs during execution.
 		 */
 		update(handler: MysqlHandler, data: IDbCategory): Promise<unknown> {
@@ -442,7 +457,7 @@ const MySqlService = {
 						data.id
 					]
 					const _sql = `UPDATE "categories" SET ${_template} WHERE 'id' = ?`;
-					return resolve(handler.execute(_sql, _values));
+					return resolve(handler.execute(_sql, _values) as unknown as number);
 
 				} catch (err: unknown) {
 					reject(err as Error);