diff --git a/Contracts/RequestModels/Customer/CustomerDataListRequest.cs b/Contracts/RequestModels/Customer/CustomerDataListRequest.cs
index 8dec991..af44ac7 100644
--- a/Contracts/RequestModels/Customer/CustomerDataListRequest.cs
+++ b/Contracts/RequestModels/Customer/CustomerDataListRequest.cs
@@ -5,5 +5,6 @@ namespace Contracts.RequestModels.Customer
 {
 	public class CustomerDataListRequest : IRequest<CustomerDataListResponse>
 	{
+
 	}
 }
diff --git a/Contracts/RequestModels/Customer/UpdateCustomerDataRequest.cs b/Contracts/RequestModels/Customer/UpdateCustomerDataRequest.cs
new file mode 100644
index 0000000..ce1d8cb
--- /dev/null
+++ b/Contracts/RequestModels/Customer/UpdateCustomerDataRequest.cs
@@ -0,0 +1,24 @@
+using Contracts.ResponseModels.Customer;
+using MediatR;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Contracts.RequestModels.Customer
+{
+    public class UpdateCustomerDataRequest : UpdateCustomerDataModel, IRequest<UpdateCustomerDataResponse>
+    {
+        public Guid? CustomerId { get; set; }
+
+        
+    }
+
+    public class UpdateCustomerDataModel
+    {
+        public string Name { get; set; } = string.Empty;
+        public string Email { get; set; } = string.Empty;
+
+    }
+}
diff --git a/Contracts/ResponseModels/Customer/UpdateCustomerDataResponse.cs b/Contracts/ResponseModels/Customer/UpdateCustomerDataResponse.cs
new file mode 100644
index 0000000..8407a43
--- /dev/null
+++ b/Contracts/ResponseModels/Customer/UpdateCustomerDataResponse.cs
@@ -0,0 +1,10 @@
+
+namespace Contracts.ResponseModels.Customer
+{
+    public class UpdateCustomerDataResponse
+    {
+        public bool Success { get; set; }
+        public string Message { get; set; } = string.Empty;
+    }
+  
+}
diff --git a/Services/RequestHandlers/ManageCustomer/UpdateCustomerDataHandler.cs b/Services/RequestHandlers/ManageCustomer/UpdateCustomerDataHandler.cs
new file mode 100644
index 0000000..1017876
--- /dev/null
+++ b/Services/RequestHandlers/ManageCustomer/UpdateCustomerDataHandler.cs
@@ -0,0 +1,42 @@
+
+using Contracts.RequestModels.Customer;
+using Contracts.ResponseModels.Customer;
+using Entity.Entity;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Storage.Json;
+
+namespace Services.RequestHandlers.ManageCustomer
+{
+    public class UpdateCustomerDataHandler : IRequestHandler<UpdateCustomerDataRequest, UpdateCustomerDataResponse>
+    {
+        private readonly DBContext _db;
+        public UpdateCustomerDataHandler(DBContext db)
+        {
+            _db = db;
+        }
+        public async Task<UpdateCustomerDataResponse> Handle(UpdateCustomerDataRequest request, CancellationToken cancellationToken)
+        {
+            var existingData = await _db.Customers.FindAsync(request.CustomerId);
+            if (existingData == null)
+            {
+                return new UpdateCustomerDataResponse()
+                {
+                    Success = false,
+                    Message = "Data Tidak ditemukan"
+                };
+            }
+            existingData.Name = request.Name;
+            existingData.Email = request.Email;
+            _db.Customers.Update(existingData);
+            await _db.SaveChangesAsync(cancellationToken);   
+            return new UpdateCustomerDataResponse()
+            {
+                Success = true,
+                Message = "Data Updated."
+            };
+
+        }
+
+    }
+}
diff --git a/Services/Validators/Customer/UpdateCustomerValidator.cs b/Services/Validators/Customer/UpdateCustomerValidator.cs
new file mode 100644
index 0000000..40019d4
--- /dev/null
+++ b/Services/Validators/Customer/UpdateCustomerValidator.cs
@@ -0,0 +1,35 @@
+using Contracts.RequestModels.Customer;
+using Entity.Entity;
+using FluentValidation;
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Services.Validators.Customer
+{
+    public class UpdateCustomerValidator : AbstractValidator<UpdateCustomerDataRequest>
+    {
+        private readonly DBContext _db;
+        public UpdateCustomerValidator(DBContext db)
+        {
+            _db = db;
+            RuleFor(Q => Q.Name).NotEmpty().WithMessage("Name Can't be Empty!")
+                .MaximumLength(20).WithMessage("Maximum Name's Length 20 Characters!");
+
+            RuleFor(Q => Q.Email).EmailAddress().NotEmpty().WithMessage("Email Can't Be Empty!")
+                .MustAsync(AvailableEmails).WithMessage("The email you give is already exist!");
+                
+        }
+
+        public async Task <bool> AvailableEmails (string email, CancellationToken cancellationToken)
+        {
+            var existingEmail = await _db.Customers.Where(Q => Q.Email == email).AsNoTracking().AnyAsync();
+
+            return !existingEmail;
+        }
+
+    }
+}
diff --git a/WebApiTraining2/Controllers/CustomerController.cs b/WebApiTraining2/Controllers/CustomerController.cs
index 942bc74..c353f8c 100644
--- a/WebApiTraining2/Controllers/CustomerController.cs
+++ b/WebApiTraining2/Controllers/CustomerController.cs
@@ -4,6 +4,7 @@
 using FluentValidation;
 using FluentValidation.AspNetCore;
 using Microsoft.AspNetCore.Mvc;
+using Services.Validators.Customer;
 
 // For more information on enabling Web API for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860
 
@@ -56,14 +57,27 @@ public async Task<ActionResult<CreateCustomerResponse>> Post([FromBody] CreateCu
 
 		// PUT api/<CustomerController>/5
 		[HttpPut("{id}")]
-		public void Put(int id, [FromBody] string value)
+		public async Task <ActionResult<UpdateCustomerDataRequest>> Put(Guid id, [FromBody] UpdateCustomerDataModel model, [FromServices] IValidator<UpdateCustomerDataRequest> validator, CancellationToken cancellationToken)
 		{
+			var request = new UpdateCustomerDataRequest { CustomerId = id, Name = model.Name, Email = model.Email };
+			//request.CustomerId = id;
+			var validationResult = await validator.ValidateAsync(request);
+			if (!validationResult.IsValid)
+			{
+				validationResult.AddToModelState(ModelState);
+				return ValidationProblem(ModelState);
+			}
+
+			var response = await _mediator.Send(request, cancellationToken);
+			return Ok(response);
+
 		}
 
 		// DELETE api/<CustomerController>/5
 		[HttpDelete("{id}")]
 		public void Delete(int id)
 		{
+
 		}
 	}
 }
diff --git a/WebApiTraining2/training.db b/WebApiTraining2/training.db
index afe972d..13e353a 100644
Binary files a/WebApiTraining2/training.db and b/WebApiTraining2/training.db differ
diff --git a/WebApiTraining2/training.db-shm b/WebApiTraining2/training.db-shm
new file mode 100644
index 0000000..fe9ac28
Binary files /dev/null and b/WebApiTraining2/training.db-shm differ
diff --git a/WebApiTraining2/training.db-wal b/WebApiTraining2/training.db-wal
new file mode 100644
index 0000000..e69de29