diff --git a/src/Nager.Authentication.Abstraction/Entities/UserEntity.cs b/src/Nager.Authentication.Abstraction/Entities/UserEntity.cs
index 12cd10c..03121bc 100644
--- a/src/Nager.Authentication.Abstraction/Entities/UserEntity.cs
+++ b/src/Nager.Authentication.Abstraction/Entities/UserEntity.cs
@@ -26,8 +26,8 @@ public class UserEntity
         [MaxLength(32)]
         public byte[]? PasswordHash { get; set; }
 
-        public DateTime LastValidationTimestamp { get; set; }
+        public DateTime? LastFailedValidationTimestamp { get; set; }
 
-        public DateTime LastSuccessfulValidationTimestamp { get; set; }
+        public DateTime? LastSuccessfulValidationTimestamp { get; set; }
     }
 }
diff --git a/src/Nager.Authentication.Abstraction/Models/UserInfo.cs b/src/Nager.Authentication.Abstraction/Models/UserInfo.cs
index f658e78..2166806 100644
--- a/src/Nager.Authentication.Abstraction/Models/UserInfo.cs
+++ b/src/Nager.Authentication.Abstraction/Models/UserInfo.cs
@@ -14,8 +14,8 @@ public class UserInfo
 
         public string? Lastname { get; set; }
 
-        public DateTime LastValidationTimestamp { get; set; }
+        public DateTime? LastFailedValidationTimestamp { get; set; }
 
-        public DateTime LastSuccessfulValidationTimestamp { get; set; }
+        public DateTime? LastSuccessfulValidationTimestamp { get; set; }
     }
 }
diff --git a/src/Nager.Authentication.Abstraction/Nager.Authentication.Abstraction.csproj b/src/Nager.Authentication.Abstraction/Nager.Authentication.Abstraction.csproj
index 6229389..90929c9 100644
--- a/src/Nager.Authentication.Abstraction/Nager.Authentication.Abstraction.csproj
+++ b/src/Nager.Authentication.Abstraction/Nager.Authentication.Abstraction.csproj
@@ -20,7 +20,7 @@
     <Nullable>enable</Nullable>
     <TargetFramework>netstandard2.1</TargetFramework>
 
-    <Version>1.1.0</Version>
+    <Version>1.2.0</Version>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Nager.Authentication.AspNet/Controllers/UserManagementController.cs b/src/Nager.Authentication.AspNet/Controllers/UserManagementController.cs
index 19c1318..7b808df 100644
--- a/src/Nager.Authentication.AspNet/Controllers/UserManagementController.cs
+++ b/src/Nager.Authentication.AspNet/Controllers/UserManagementController.cs
@@ -64,7 +64,7 @@ public async Task<ActionResult<UserInfoDto>> GetUserAsync(
                 Firstname = userInfo.Firstname,
                 Lastname = userInfo.Lastname,
                 Roles = userInfo.Roles,
-                LastValidationTimestamp = userInfo.LastValidationTimestamp,
+                LastFailedValidationTimestamp = userInfo.LastFailedValidationTimestamp,
                 LastSuccessfulValidationTimestamp = userInfo.LastSuccessfulValidationTimestamp
             };
 
@@ -93,7 +93,7 @@ public async Task<ActionResult<UserInfoDto[]>> QueryUsersAsync(
                 Firstname = userInfo.Firstname,
                 Lastname = userInfo.Lastname,
                 Roles = userInfo.Roles,
-                LastValidationTimestamp = userInfo.LastValidationTimestamp,
+                LastFailedValidationTimestamp = userInfo.LastFailedValidationTimestamp,
                 LastSuccessfulValidationTimestamp  = userInfo.LastSuccessfulValidationTimestamp
             });
 
diff --git a/src/Nager.Authentication.AspNet/Dtos/UserInfoDto.cs b/src/Nager.Authentication.AspNet/Dtos/UserInfoDto.cs
index 8a13167..c3c08f7 100644
--- a/src/Nager.Authentication.AspNet/Dtos/UserInfoDto.cs
+++ b/src/Nager.Authentication.AspNet/Dtos/UserInfoDto.cs
@@ -14,8 +14,8 @@ public class UserInfoDto
 
         public string Lastname { get; set; }
 
-        public DateTime LastValidationTimestamp { get; set; }
+        public DateTime? LastFailedValidationTimestamp { get; set; }
 
-        public DateTime LastSuccessfulValidationTimestamp { get; set; }
+        public DateTime? LastSuccessfulValidationTimestamp { get; set; }
     }
 }
diff --git a/src/Nager.Authentication.AspNet/Nager.Authentication.AspNet.csproj b/src/Nager.Authentication.AspNet/Nager.Authentication.AspNet.csproj
index 94cf18b..c31418c 100644
--- a/src/Nager.Authentication.AspNet/Nager.Authentication.AspNet.csproj
+++ b/src/Nager.Authentication.AspNet/Nager.Authentication.AspNet.csproj
@@ -18,7 +18,7 @@
     <TargetFrameworks>net8.0;net7.0;net6.0</TargetFrameworks>
     <Nullable>enable</Nullable>
 	  
-    <Version>1.1.2</Version>
+    <Version>1.2.0</Version>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Nager.Authentication.InMemoryRepository/InMemoryUserRepository.cs b/src/Nager.Authentication.InMemoryRepository/InMemoryUserRepository.cs
index 9ec4d4f..a255cf3 100644
--- a/src/Nager.Authentication.InMemoryRepository/InMemoryUserRepository.cs
+++ b/src/Nager.Authentication.InMemoryRepository/InMemoryUserRepository.cs
@@ -96,7 +96,7 @@ public Task<bool> SetLastValidationTimestampAsync(
                 return Task.FromResult(false);
             }
 
-            item.LastValidationTimestamp = DateTime.UtcNow;
+            item.LastFailedValidationTimestamp = DateTime.UtcNow;
 
             return Task.FromResult(true);
         }
diff --git a/src/Nager.Authentication.UnitTest/RoleHelperTest.cs b/src/Nager.Authentication.UnitTest/RoleHelperTest.cs
index 04e1ddf..f8e0ccd 100644
--- a/src/Nager.Authentication.UnitTest/RoleHelperTest.cs
+++ b/src/Nager.Authentication.UnitTest/RoleHelperTest.cs
@@ -8,7 +8,7 @@ namespace Nager.Authentication.UnitTest
     public class RoleHelperTest
     {
         [TestMethod]
-        public async Task AddRoleToRoleData_RoleDataNull_Successful()
+        public void AddRoleToRoleData_RoleDataNull_Successful()
         {
             var roleData = RoleHelper.AddRoleToRoleData(null, "test");
 
@@ -16,7 +16,7 @@ public async Task AddRoleToRoleData_RoleDataNull_Successful()
         }
 
         [TestMethod]
-        public async Task AddRoleToRoleData_RoleDataStringEmpty_Successful()
+        public void AddRoleToRoleData_RoleDataStringEmpty_Successful()
         {
             var roleData = RoleHelper.AddRoleToRoleData(string.Empty, "test");
 
@@ -24,7 +24,7 @@ public async Task AddRoleToRoleData_RoleDataStringEmpty_Successful()
         }
 
         [TestMethod]
-        public async Task AddRoleToRoleData_DuplicateRoleTest_Successful()
+        public void AddRoleToRoleData_DuplicateRoleTest_Successful()
         {
             var roleData = RoleHelper.AddRoleToRoleData("test", "test");
 
@@ -32,7 +32,7 @@ public async Task AddRoleToRoleData_DuplicateRoleTest_Successful()
         }
 
         [TestMethod]
-        public async Task AddRoleToRoleData_DuplicateRoleTestPascalCase_Successful()
+        public void AddRoleToRoleData_DuplicateRoleTestPascalCase_Successful()
         {
             var roleData = RoleHelper.AddRoleToRoleData("test", "Test");
 
diff --git a/src/Nager.Authentication/Nager.Authentication.csproj b/src/Nager.Authentication/Nager.Authentication.csproj
index 99af7a5..5e04b8b 100644
--- a/src/Nager.Authentication/Nager.Authentication.csproj
+++ b/src/Nager.Authentication/Nager.Authentication.csproj
@@ -20,7 +20,7 @@
   <Nullable>enable</Nullable>
   <TargetFrameworks>net8.0;net7.0;net6.0</TargetFrameworks>
   
-  <Version>1.1.2</Version>
+  <Version>1.2.0</Version>
 </PropertyGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
diff --git a/src/Nager.Authentication/Services/UserManagementService.cs b/src/Nager.Authentication/Services/UserManagementService.cs
index 80c74cb..4736c41 100644
--- a/src/Nager.Authentication/Services/UserManagementService.cs
+++ b/src/Nager.Authentication/Services/UserManagementService.cs
@@ -33,7 +33,7 @@ private UserInfo MapUserInfo(UserEntity userEntity)
                 Firstname = userEntity.Firstname,
                 Lastname = userEntity.Lastname,
                 Roles = RoleHelper.GetRoles(userEntity.RolesData),
-                LastValidationTimestamp = userEntity.LastValidationTimestamp,
+                LastFailedValidationTimestamp = userEntity.LastFailedValidationTimestamp,
                 LastSuccessfulValidationTimestamp = userEntity.LastSuccessfulValidationTimestamp
             };
         }