diff --git a/IRaCIS.Core.Application/Service/Management/UserService.cs b/IRaCIS.Core.Application/Service/Management/UserService.cs
index 1f9d84f..3091fd0 100644
--- a/IRaCIS.Core.Application/Service/Management/UserService.cs
+++ b/IRaCIS.Core.Application/Service/Management/UserService.cs
@@ -615,7 +615,7 @@ namespace IRaCIS.Application.Services
             var userLoginReturnModel = new LoginReturnDTO();
 
 
-            var loginUser = await _userRepository.Where(u => u.UserName== userName && u.Password == password).ProjectTo<UserBasicInfo>(_mapper.ConfigurationProvider).FirstOrDefaultAsync();
+            var loginUser = await _userRepository.Where(u => EF.Functions.Collate(u.UserName, "SQL_Latin1_General_CP1_CS_AS") == userName && u.Password == password).ProjectTo<UserBasicInfo>(_mapper.ConfigurationProvider).FirstOrDefaultAsync();
 
             if (loginUser == null)
             {