diff --git a/ClientApp/Models/Info.cs b/ClientApp/Models/Info.cs
index 350d6e8..262032d 100644
--- a/ClientApp/Models/Info.cs
+++ b/ClientApp/Models/Info.cs
@@ -2,6 +2,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
+using Util;
 
 namespace ClientApp.Models
 {
diff --git a/ClientApp/ViewModels/LoginViewModel.cs b/ClientApp/ViewModels/LoginViewModel.cs
index 7adccd1..1179ec2 100644
--- a/ClientApp/ViewModels/LoginViewModel.cs
+++ b/ClientApp/ViewModels/LoginViewModel.cs
@@ -7,6 +7,7 @@ using System.Windows.Controls;
 using System.Windows.Input;
 using ClientApp.Utils;
 using GalaSoft.MvvmLight.Command;
+using Util;
 
 namespace ClientApp.ViewModels
 {
diff --git a/ClientApp/ViewModels/MainViewModel.cs b/ClientApp/ViewModels/MainViewModel.cs
index 58252e1..0e5d601 100644
--- a/ClientApp/ViewModels/MainViewModel.cs
+++ b/ClientApp/ViewModels/MainViewModel.cs
@@ -3,6 +3,7 @@ using ClientApp.Utils;
 using GalaSoft.MvvmLight.Command;
 using System.Diagnostics;
 using System.Windows.Input;
+using Util;
 
 namespace ClientApp.ViewModels
 {
diff --git a/ClientApp/ViewModels/MainWindowViewModel.cs b/ClientApp/ViewModels/MainWindowViewModel.cs
index f30bf73..2061ccf 100644
--- a/ClientApp/ViewModels/MainWindowViewModel.cs
+++ b/ClientApp/ViewModels/MainWindowViewModel.cs
@@ -3,6 +3,7 @@ using ClientApp.Utils;
 using System;
 using System.Collections.Generic;
 using System.Text;
+using Util;
 
 namespace ClientApp.ViewModels
 {
diff --git a/DoctorApp/Models/Info.cs b/DoctorApp/Models/Info.cs
index 4c195ca..0d39258 100644
--- a/DoctorApp/Models/Info.cs
+++ b/DoctorApp/Models/Info.cs
@@ -2,6 +2,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
+using Util;
 
 namespace DoctorApp.Models
 {
diff --git a/DoctorApp/Utils/ObservableObject.cs b/DoctorApp/Utils/ObservableObject.cs
deleted file mode 100644
index 9b35f60..0000000
--- a/DoctorApp/Utils/ObservableObject.cs
+++ /dev/null
@@ -1,12 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Text;
-
-namespace DoctorApp.Utils
-{
-    public abstract class ObservableObject : INotifyPropertyChanged
-    {
-        public event PropertyChangedEventHandler PropertyChanged;
-    }
-}
diff --git a/DoctorApp/ViewModels/LoginViewModel.cs b/DoctorApp/ViewModels/LoginViewModel.cs
index a8e26ae..1c9e18a 100644
--- a/DoctorApp/ViewModels/LoginViewModel.cs
+++ b/DoctorApp/ViewModels/LoginViewModel.cs
@@ -6,6 +6,7 @@ using System.Collections.Generic;
 using System.Text;
 using System.Windows.Controls;
 using System.Windows.Input;
+using Util;
 
 namespace DoctorApp.ViewModels
 {
diff --git a/DoctorApp/ViewModels/MainViewModel.cs b/DoctorApp/ViewModels/MainViewModel.cs
index 27c8e69..2b34b32 100644
--- a/DoctorApp/ViewModels/MainViewModel.cs
+++ b/DoctorApp/ViewModels/MainViewModel.cs
@@ -5,6 +5,7 @@ using System.Collections.ObjectModel;
 using System.ComponentModel;
 using System.Text;
 using System.Windows.Controls;
+using Util;
 
 namespace DoctorApp.ViewModels
 {
diff --git a/DoctorApp/ViewModels/MainWindowViewModel.cs b/DoctorApp/ViewModels/MainWindowViewModel.cs
index 7b41840..fa7a982 100644
--- a/DoctorApp/ViewModels/MainWindowViewModel.cs
+++ b/DoctorApp/ViewModels/MainWindowViewModel.cs
@@ -3,6 +3,7 @@ using DoctorApp.Utils;
 using System;
 using System.Collections.Generic;
 using System.Text;
+using Util;
 
 namespace DoctorApp.ViewModels
 {
diff --git a/Hashing/Hashing.projitems b/Hashing/Hashing.projitems
index 73a08de..a81b09e 100644
--- a/Hashing/Hashing.projitems
+++ b/Hashing/Hashing.projitems
@@ -11,5 +11,6 @@
   <ItemGroup>
     <Compile Include="$(MSBuildThisFileDirectory)DataParser.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Hasher.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ObservableObject.cs" />
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/ClientApp/Utils/ObservableObject.cs b/Hashing/ObservableObject.cs
similarity index 90%
rename from ClientApp/Utils/ObservableObject.cs
rename to Hashing/ObservableObject.cs
index 3809fa1..c56ec0c 100644
--- a/ClientApp/Utils/ObservableObject.cs
+++ b/Hashing/ObservableObject.cs
@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using System.ComponentModel;
 using System.Text;
 
-namespace ClientApp.Utils
+namespace Util
 {
     public abstract class ObservableObject : INotifyPropertyChanged
     {