diff --git a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/OrganizationUnit.cs b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/OrganizationUnit.cs
index 4f49e6935d..3d1bbb0531 100644
--- a/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/OrganizationUnit.cs
+++ b/modules/identity/src/Volo.Abp.Identity.Domain/Volo/Abp/Identity/OrganizationUnit.cs
@@ -18,7 +18,7 @@ namespace Volo.Abp.Identity
         /// Parent <see cref="OrganizationUnit"/> Id.
         /// Null, if this OU is a root.
         /// </summary>
-        public virtual Guid? ParentId { get; set; }
+        public virtual Guid? ParentId { get; internal set; }
 
         /// <summary>
         /// Hierarchical Code of this organization unit.
@@ -26,13 +26,13 @@ namespace Volo.Abp.Identity
         /// This is a unique code for a Tenant.
         /// It's changeable if OU hierarchy is changed.
         /// </summary>
-        public virtual string Code { get; set; }
+        public virtual string Code { get; internal set; }
 
         /// <summary>
         /// Display name of this role.
         /// </summary>
-        public virtual string DisplayName { get; set; }
-        
+        public virtual string DisplayName { get; set; }
+
         /// <summary>
         /// Roles of this OU.
         /// </summary>
diff --git a/modules/identity/test/Volo.Abp.Identity.Domain.Tests/Volo/Abp/Identity/OrganizationUnitManager_Tests.cs b/modules/identity/test/Volo.Abp.Identity.Domain.Tests/Volo/Abp/Identity/OrganizationUnitManager_Tests.cs
index 65c1068bb4..55684108c3 100644
--- a/modules/identity/test/Volo.Abp.Identity.Domain.Tests/Volo/Abp/Identity/OrganizationUnitManager_Tests.cs
+++ b/modules/identity/test/Volo.Abp.Identity.Domain.Tests/Volo/Abp/Identity/OrganizationUnitManager_Tests.cs
@@ -41,10 +41,10 @@ namespace Volo.Abp.Identity
         public async Task UpdateAsync()
         {
             var ou = await _organizationUnitRepository.GetAsync("OU111");
-            ou.Code = OrganizationUnit.CreateCode(123);
+            ou.DisplayName = "OU111 Updated";
             await _organizationUnitManager.UpdateAsync(ou);
 
-            var ouAfterChange = await _organizationUnitRepository.GetAsync("OU111");
+            var ouAfterChange = await _organizationUnitRepository.GetAsync("OU111 Updated");
             ouAfterChange.Code.ShouldContain("123");
         }