diff --git a/modules/account/src/Volo.Abp.Account.Application/Volo/Abp/Account/ProfileAppService.cs b/modules/account/src/Volo.Abp.Account.Application/Volo/Abp/Account/ProfileAppService.cs
index 20ce663f02..d2baae8393 100644
--- a/modules/account/src/Volo.Abp.Account.Application/Volo/Abp/Account/ProfileAppService.cs
+++ b/modules/account/src/Volo.Abp.Account.Application/Volo/Abp/Account/ProfileAppService.cs
@@ -68,8 +68,8 @@ public class ProfileAppService : IdentityAppServiceBase, IProfileAppService
             (await UserManager.SetPhoneNumberAsync(user, input.PhoneNumber)).CheckErrors();
         }
 
-        user.Name = input.Name.Trim();
-        user.Surname = input.Surname.Trim();
+        user.Name = input.Name?.Trim();
+        user.Surname = input.Surname?.Trim();
 
         input.MapExtraPropertiesTo(user);
 
diff --git a/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs b/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs
index 7eb557c74e..a56935424e 100644
--- a/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Application/Volo/Abp/Identity/IdentityUserAppService.cs
@@ -184,8 +184,8 @@ public class IdentityUserAppService : IdentityAppServiceBase, IIdentityUserAppSe
             user.SetIsActive(input.IsActive);
         }
 
-        user.Name = input.Name.Trim();
-        user.Surname = input.Surname.Trim();
+        user.Name = input.Name?.Trim();
+        user.Surname = input.Surname?.Trim();
         (await UserManager.UpdateAsync(user)).CheckErrors();
         if (input.RoleNames != null && await PermissionChecker.IsGrantedAsync(IdentityPermissions.Users.ManageRoles))
         {