diff --git a/ValheimMjod/App.xaml b/ValheimMjod/App.xaml
index 5fabf41..09efcc0 100644
--- a/ValheimMjod/App.xaml
+++ b/ValheimMjod/App.xaml
@@ -2,8 +2,7 @@
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:local="clr-namespace:ValheimMjod"
-             xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
-             StartupUri="MainWindow.xaml">
+             xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit">
     <Application.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
diff --git a/ValheimMjod/App.xaml.cs b/ValheimMjod/App.xaml.cs
index 68817ff..7d2f97b 100644
--- a/ValheimMjod/App.xaml.cs
+++ b/ValheimMjod/App.xaml.cs
@@ -1,10 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Configuration;
-using System.Data;
-using System.Linq;
-using System.Threading.Tasks;
-using System.Windows;
+using System.Windows;
 
 namespace ValheimMjod
 {
@@ -13,5 +7,13 @@ namespace ValheimMjod
     /// </summary>
     public partial class App : Application
     {
+        Updater _updater;
+        protected override void OnStartup(StartupEventArgs e)
+        {
+            var window = new MainWindow();
+            window.Show();
+            _updater = new Updater();
+            base.OnStartup(e);
+        }
     }
 }
diff --git a/ValheimMjod/Properties/AssemblyInfo.cs b/ValheimMjod/Properties/AssemblyInfo.cs
index a9025d7..a4ef9a1 100644
--- a/ValheimMjod/Properties/AssemblyInfo.cs
+++ b/ValheimMjod/Properties/AssemblyInfo.cs
@@ -1,6 +1,4 @@
 using System.Reflection;
-using System.Resources;
-using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using System.Windows;
 
@@ -51,5 +49,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]
+[assembly: AssemblyVersion("0.4.0.0")]
+[assembly: AssemblyFileVersion("0.4.0.0")]
diff --git a/ValheimMjod/Updater.cs b/ValheimMjod/Updater.cs
new file mode 100644
index 0000000..266386d
--- /dev/null
+++ b/ValheimMjod/Updater.cs
@@ -0,0 +1,80 @@
+using Squirrel;
+using System;
+using System.Threading;
+using System.Windows;
+
+namespace ValheimMjod
+{
+    public class Updater
+    {
+        private readonly string Path = @"https://github.com/porohkun/ValheimMjod/releases/latest/download/";
+        private readonly AutoResetEvent _autoEvent;
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("CodeQuality", "IDE0052:Remove unread private members", Justification = "<Pending>")]
+        private readonly Timer _timer;
+
+        public Updater()
+        {
+#if DEBUG
+            return;
+#endif
+            _autoEvent = new AutoResetEvent(false);
+            _timer = new Timer(CheckStatus, _autoEvent, 5000, 30000);
+        }
+
+        private void CheckStatus(object stateInfo)
+        {
+            CheckUpdates();
+        }
+
+        public async void CheckUpdates()
+        {
+            try
+            {
+                using (var mgr = new UpdateManager(Path))
+                {
+                    SquirrelAwareApp.HandleEvents(
+                        onInitialInstall: v =>
+                        {
+                            mgr.CreateShortcutForThisExe();
+                        },
+                        onAppUpdate: v =>
+                        {
+                            mgr.CreateShortcutForThisExe();
+                        },
+                        onAppUninstall: v =>
+                        {
+                            mgr.RemoveShortcutForThisExe();
+                        },
+                        onFirstRun: () =>
+                        {
+                        });
+
+                    if (!mgr.IsInstalledApp) //not installed during Squirrel, skipping update
+                        return;
+
+                    try
+                    {
+                        var installedVersion = mgr.CurrentlyInstalledVersion();
+                        var entry = await mgr.UpdateApp();
+                        if (entry != null && (installedVersion == null || entry.Version > installedVersion))
+                        {
+                            MessageBox.Show("You need to restart app for apply changes", "Valheim Mjöð have been updated", MessageBoxButton.OK);
+                        }
+                    }
+                    catch (Exception ex)
+                    {
+                        var errorMessage = $"{ex.Message}\r\n\r\n{ex.StackTrace}\r\n\r\nCopy error message to clipboard?";
+                        if (MessageBox.Show(errorMessage, "Error in update/install process", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
+                            Clipboard.SetText(errorMessage);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                var errorMessage = $"{ex.Message}\r\n\r\n{ex.StackTrace}\r\n\r\nCopy error message to clipboard?";
+                if (MessageBox.Show(errorMessage, "Error before update/install process", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
+                    Clipboard.SetText(errorMessage);
+            }
+        }
+    }
+}
diff --git a/ValheimMjod/ValheimMjod.csproj b/ValheimMjod/ValheimMjod.csproj
index 54e5707..14c3755 100644
--- a/ValheimMjod/ValheimMjod.csproj
+++ b/ValheimMjod/ValheimMjod.csproj
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\packages\squirrel.windows.2.0.1\build\squirrel.windows.props" Condition="Exists('..\packages\squirrel.windows.2.0.1\build\squirrel.windows.props')" />
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -14,6 +15,8 @@
     <WarningLevel>4</WarningLevel>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <Deterministic>true</Deterministic>
+    <NuGetPackageImportStamp>
+    </NuGetPackageImportStamp>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <PlatformTarget>AnyCPU</PlatformTarget>
@@ -38,9 +41,39 @@
     <ApplicationIcon>mug.ico</ApplicationIcon>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="DeltaCompressionDotNet, Version=1.1.0.0, Culture=neutral, PublicKeyToken=1d14d6e5194e7f4a, processorArchitecture=MSIL">
+      <HintPath>..\packages\DeltaCompressionDotNet.1.1.0\lib\net20\DeltaCompressionDotNet.dll</HintPath>
+    </Reference>
+    <Reference Include="DeltaCompressionDotNet.MsDelta, Version=1.1.0.0, Culture=neutral, PublicKeyToken=46b2138a390abf55, processorArchitecture=MSIL">
+      <HintPath>..\packages\DeltaCompressionDotNet.1.1.0\lib\net20\DeltaCompressionDotNet.MsDelta.dll</HintPath>
+    </Reference>
+    <Reference Include="DeltaCompressionDotNet.PatchApi, Version=1.1.0.0, Culture=neutral, PublicKeyToken=3e8888ee913ed789, processorArchitecture=MSIL">
+      <HintPath>..\packages\DeltaCompressionDotNet.1.1.0\lib\net20\DeltaCompressionDotNet.PatchApi.dll</HintPath>
+    </Reference>
     <Reference Include="Microsoft.Xaml.Behaviors, Version=1.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.Xaml.Behaviors.Wpf.1.1.31\lib\net45\Microsoft.Xaml.Behaviors.dll</HintPath>
     </Reference>
+    <Reference Include="Mono.Cecil, Version=0.11.2.0, Culture=neutral, PublicKeyToken=50cebf1cceb9d05e, processorArchitecture=MSIL">
+      <HintPath>..\packages\Mono.Cecil.0.11.2\lib\net40\Mono.Cecil.dll</HintPath>
+    </Reference>
+    <Reference Include="Mono.Cecil.Mdb, Version=0.11.2.0, Culture=neutral, PublicKeyToken=50cebf1cceb9d05e, processorArchitecture=MSIL">
+      <HintPath>..\packages\Mono.Cecil.0.11.2\lib\net40\Mono.Cecil.Mdb.dll</HintPath>
+    </Reference>
+    <Reference Include="Mono.Cecil.Pdb, Version=0.11.2.0, Culture=neutral, PublicKeyToken=50cebf1cceb9d05e, processorArchitecture=MSIL">
+      <HintPath>..\packages\Mono.Cecil.0.11.2\lib\net40\Mono.Cecil.Pdb.dll</HintPath>
+    </Reference>
+    <Reference Include="Mono.Cecil.Rocks, Version=0.11.2.0, Culture=neutral, PublicKeyToken=50cebf1cceb9d05e, processorArchitecture=MSIL">
+      <HintPath>..\packages\Mono.Cecil.0.11.2\lib\net40\Mono.Cecil.Rocks.dll</HintPath>
+    </Reference>
+    <Reference Include="NuGet.Squirrel, Version=3.0.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\squirrel.windows.2.0.1\lib\Net45\NuGet.Squirrel.dll</HintPath>
+    </Reference>
+    <Reference Include="SharpCompress, Version=0.17.1.0, Culture=neutral, PublicKeyToken=afb0a02973931d96, processorArchitecture=MSIL">
+      <HintPath>..\packages\SharpCompress.0.17.1\lib\net45\SharpCompress.dll</HintPath>
+    </Reference>
+    <Reference Include="Squirrel, Version=2.0.0.0, Culture=neutral, processorArchitecture=MSIL">
+      <HintPath>..\packages\squirrel.windows.2.0.1\lib\Net45\Squirrel.dll</HintPath>
+    </Reference>
     <Reference Include="System" />
     <Reference Include="System.Configuration" />
     <Reference Include="System.Data" />
@@ -87,6 +120,7 @@
       <SubType>Designer</SubType>
     </ApplicationDefinition>
     <Compile Include="CharacterViewModel.cs" />
+    <None Include="ValheimMjod.nuspec" />
     <Compile Include="Converters\StringCamelCaseConverter.cs" />
     <Compile Include="Converters\Vector3ToColorConverter.cs" />
     <Compile Include="Converters\Vector3ToBrushConverter.cs" />
@@ -104,6 +138,7 @@
     <Compile Include="UnityEngine\Vector2.cs" />
     <Compile Include="UnityEngine\Vector2i.cs" />
     <Compile Include="UnityEngine\Vector3.cs" />
+    <Compile Include="Updater.cs" />
     <Compile Include="Valheim\Biome.cs" />
     <Compile Include="Valheim\Inventory.cs" />
     <Compile Include="Valheim\ItemData.cs" />
@@ -170,4 +205,17 @@
   <Import Project="..\WPF.MyFlatTheme\WPF.MyFlatTheme.projitems" Label="Shared" />
   <Import Project="..\WPF.Controls.IntUpDown\WPF.Controls.IntUpDown\WPF.Controls.IntUpDown.projitems" Label="Shared" />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\packages\squirrel.windows.2.0.1\build\squirrel.windows.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\squirrel.windows.2.0.1\build\squirrel.windows.props'))" />
+  </Target>
+  <Target Name="AfterBuild" AfterTargets="PostBuildEvent" Condition=" '$(Configuration)' == 'Release'">
+    <GetAssemblyIdentity AssemblyFiles="$(TargetPath)">
+      <Output TaskParameter="Assemblies" ItemName="myAssemblyInfo" />
+    </GetAssemblyIdentity>
+    <Exec Command="nuget.exe pack $(ProjectName).nuspec -Version %(myAssemblyInfo.Version) -Properties Configuration=Release -OutputDirectory $(OutDir) -BasePath $(OutDir)" />
+    <Exec Command="..\packages\squirrel.windows.2.0.1\tools\Squirrel.exe --releasify $(TargetDir)$(ProjectName).$([System.Version]::Parse(%(myAssemblyInfo.Version)).ToString(3)).nupkg -r ..\Releases\" />
+  </Target>
 </Project>
\ No newline at end of file
diff --git a/ValheimMjod/ValheimMjod.nuspec b/ValheimMjod/ValheimMjod.nuspec
new file mode 100644
index 0000000..d7fc4c5
--- /dev/null
+++ b/ValheimMjod/ValheimMjod.nuspec
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<package xmlns="http://schemas.microsoft.com/packaging/2010/07/nuspec.xsd">
+  <metadata>
+    <id>ValheimMjod</id>
+    <version>0.0.0.0</version>
+    <!-- version will be replaced by MSBuild -->
+    <title>Valheim Mjöð</title>
+    <authors>Porohkun</authors>
+    <description>Valheim teach us: drink mead - and you characteristics will change. But we need moar. Use truly nordic mjöð - and ALL you characteristics can be changed forewer (including inventory).</description>
+    <requireLicenseAcceptance>false</requireLicenseAcceptance>
+    <copyright>Copyright © Porohkun 2021</copyright>
+    <dependencies />
+  </metadata>
+  <files>
+    <file src="*.*" target="lib\net45\" exclude="*.pdb;*.nupkg;*.vshost.*"/>
+  </files>
+</package>
\ No newline at end of file
diff --git a/ValheimMjod/packages.config b/ValheimMjod/packages.config
index 0ff297a..ae3a23a 100644
--- a/ValheimMjod/packages.config
+++ b/ValheimMjod/packages.config
@@ -1,5 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
+  <package id="DeltaCompressionDotNet" version="1.1.0" targetFramework="net472" />
   <package id="Extended.Wpf.Toolkit" version="4.0.2" targetFramework="net472" />
   <package id="Microsoft.Xaml.Behaviors.Wpf" version="1.1.31" targetFramework="net472" />
+  <package id="Mono.Cecil" version="0.11.2" targetFramework="net472" />
+  <package id="SharpCompress" version="0.17.1" targetFramework="net472" />
+  <package id="squirrel.windows" version="2.0.1" targetFramework="net472" />
 </packages>
\ No newline at end of file