diff --git a/ModpackUpdater/AppUpdater.vb b/ModpackUpdater/AppUpdater.vb
new file mode 100644
index 0000000..9dfb84c
--- /dev/null
+++ b/ModpackUpdater/AppUpdater.vb
@@ -0,0 +1,70 @@
+Imports System.IO
+Imports System.Net
+Imports System.Net.Http
+
+Imports WebDav
+
+Public Class AppUpdater
+
+    Private Const WEBDAV_URL As String = "https://cloud.pilzinsel64.de/public.php/webdav"
+    Private Const WEBDAV_KEY As String = "z4dGicDYmG2neG9"
+    Private Const DOWNLOAD_URL As String = "https://cloud.pilzinsel64.de/s/z4dGicDYmG2neG9/download"
+
+    Public Shared Async Function Check() As Task(Of Boolean)
+        Dim appFileName = Pilz.IO.Extensions.GetExecutablePath()
+        Dim hasUpdate As Boolean = False
+        Dim params As New WebDavClientParams With {
+            .BaseAddress = New Uri(WEBDAV_URL),
+            .Credentials = New NetworkCredential(WEBDAV_KEY, String.Empty)
+        }
+
+        Try
+            Using client As New WebDavClient(params)
+                Dim result = Await client.Propfind(String.Empty)
+
+                If result.IsSuccessful AndAlso result.Resources.Any Then
+                    Dim resource = result.Resources(0)
+                    Dim appModificationDate = File.GetLastWriteTimeUtc(appFileName)
+                    Dim remoteModificationDate = resource.LastModifiedDate?.ToUniversalTime
+
+                    If remoteModificationDate > appModificationDate Then
+                        hasUpdate = True
+                    End If
+                End If
+            End Using
+        Catch ex As Exception
+        End Try
+
+        Return hasUpdate
+    End Function
+
+    Public Shared Async Function Install() As Task
+        Dim client As New HttpClient
+        Dim tempFileName = Path.GetTempFileName
+        Dim appFileName = Pilz.IO.Extensions.GetExecutablePath()
+        Dim oldFileName = appFileName & ".old"
+
+        'Delete old file
+        Try
+            File.Delete(oldFileName)
+        Catch ex As Exception
+        End Try
+
+        'Download the new file
+        Using tempFileStream As New FileStream(tempFileName, FileMode.Create, FileAccess.ReadWrite)
+            Dim downloadStream As Stream = Nothing
+            Try
+                downloadStream = Await client.GetStreamAsync(DOWNLOAD_URL)
+                Await downloadStream.CopyToAsync(tempFileStream)
+            Catch
+            Finally
+                downloadStream?.Dispose()
+            End Try
+        End Using
+
+        'Replace current application file with new file
+        File.Move(appFileName, oldFileName, True)
+        File.Move(tempFileName, appFileName)
+    End Function
+
+End Class
diff --git a/ModpackUpdater/Form1.vb b/ModpackUpdater/Form1.vb
index 5912017..0c5082a 100644
--- a/ModpackUpdater/Form1.vb
+++ b/ModpackUpdater/Form1.vb
@@ -2,6 +2,7 @@ Imports System.IO
 
 Imports ModpackUpdater.My.Resources
 
+Imports Telerik.WinControls
 Imports Telerik.WinControls.UI
 
 Public Class Form1
@@ -19,7 +20,7 @@ Public Class Form1
         Return Not String.IsNullOrEmpty(GetMinecraftProfilePath)
     End Function
 
-    Private Function GetMinecraftProfilePath() As string
+    Private Function GetMinecraftProfilePath() As String
         Return RadTextBoxControl_MinecraftProfileFolder.Text.Trim
     End Function
 
@@ -27,7 +28,7 @@ Public Class Form1
         Return Not String.IsNullOrEmpty(GetUpdateconfigPath)
     End Function
 
-    Private Function GetUpdateconfigPath() As string
+    Private Function GetUpdateconfigPath() As String
         Return RadTextBoxControl_ModpackConfig.Text.Trim
     End Function
 
@@ -43,7 +44,7 @@ Public Class Form1
         End If
     End Function
 
-    Private Sub SetStatus(statusText As string, image As Image)
+    Private Sub SetStatus(statusText As String, image As Image)
         RadLabel_Status.Text = statusText
         RadLabel_Status.Image = image
     End Sub
@@ -53,7 +54,7 @@ Public Class Form1
         RadLabel_Status.Image = Nothing
     End Sub
 
-    Private Sub LoadMinecraftProfile(folderPath As string)
+    Private Sub LoadMinecraftProfile(folderPath As String)
         RadTextBoxControl_MinecraftProfileFolder.Text = folderPath
 
         If IsUpdateConfigLoaded() Then
@@ -63,7 +64,7 @@ Public Class Form1
         End If
     End Sub
 
-    Private Sub LoadUpdateConfigFile(filePath As string)
+    Private Sub LoadUpdateConfigFile(filePath As String)
         RadTextBoxControl_ModpackConfig.Text = filePath
 
         If IsUpdateConfigLoaded() Then
@@ -183,4 +184,12 @@ Public Class Form1
         End If
     End Sub
 
+    Private Async Sub Form1_Shown(sender As Object, e As EventArgs) Handles Me.Shown
+        If Await AppUpdater.Check AndAlso RadMessageBox.Show(LangRes.MsgBox_UpdateAvailable, LangRes.MsgBox_UpdateAvailable_Title, MessageBoxButtons.YesNo, RadMessageIcon.Info) = DialogResult.Yes Then
+            SetStatus(LangRes.StatusText_InstallingAppUpdate, MySymbols.icons8_software_installer_16px)
+            Enabled = False
+            Await AppUpdater.Install()
+            Application.Restart()
+        End If
+    End Sub
 End Class
diff --git a/ModpackUpdater/LangRes.Designer.vb b/ModpackUpdater/LangRes.Designer.vb
index 4463476..40c1e7a 100644
--- a/ModpackUpdater/LangRes.Designer.vb
+++ b/ModpackUpdater/LangRes.Designer.vb
@@ -64,6 +64,24 @@ Namespace My.Resources
             End Set
         End Property
         
+        '''<summary>
+        '''  Sucht eine lokalisierte Zeichenfolge, die A new version of this program is available. If you confirm, the update will be installed automatically. It takes just a few seconds. Continue? ähnelt.
+        '''</summary>
+        Friend Shared ReadOnly Property MsgBox_UpdateAvailable() As String
+            Get
+                Return ResourceManager.GetString("MsgBox_UpdateAvailable", resourceCulture)
+            End Get
+        End Property
+        
+        '''<summary>
+        '''  Sucht eine lokalisierte Zeichenfolge, die New program version available ähnelt.
+        '''</summary>
+        Friend Shared ReadOnly Property MsgBox_UpdateAvailable_Title() As String
+            Get
+                Return ResourceManager.GetString("MsgBox_UpdateAvailable_Title", resourceCulture)
+            End Get
+        End Property
+        
         '''<summary>
         '''  Sucht eine lokalisierte Zeichenfolge, die Everything is right and up-to-date. ähnelt.
         '''</summary>
@@ -109,6 +127,15 @@ Namespace My.Resources
             End Get
         End Property
         
+        '''<summary>
+        '''  Sucht eine lokalisierte Zeichenfolge, die Downloading program update... ähnelt.
+        '''</summary>
+        Friend Shared ReadOnly Property StatusText_InstallingAppUpdate() As String
+            Get
+                Return ResourceManager.GetString("StatusText_InstallingAppUpdate", resourceCulture)
+            End Get
+        End Property
+        
         '''<summary>
         '''  Sucht eine lokalisierte Zeichenfolge, die Minecraft profile folder seems to be not valid. ähnelt.
         '''</summary>
diff --git a/ModpackUpdater/LangRes.resx b/ModpackUpdater/LangRes.resx
index fc383a2..6c0d2ec 100644
--- a/ModpackUpdater/LangRes.resx
+++ b/ModpackUpdater/LangRes.resx
@@ -117,6 +117,12 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
+  <data name="MsgBox_UpdateAvailable" xml:space="preserve">
+    <value>A new version of this program is available. If you confirm, the update will be installed automatically. It takes just a few seconds. Continue?</value>
+  </data>
+  <data name="MsgBox_UpdateAvailable_Title" xml:space="preserve">
+    <value>New program version available</value>
+  </data>
   <data name="StatusTest_EverythingOk" xml:space="preserve">
     <value>Everything is right and up-to-date.</value>
   </data>
@@ -132,6 +138,9 @@
   <data name="StatusText_Installing" xml:space="preserve">
     <value>Installing...</value>
   </data>
+  <data name="StatusText_InstallingAppUpdate" xml:space="preserve">
+    <value>Downloading program update...</value>
+  </data>
   <data name="StatusText_MinecraftProfileWarning" xml:space="preserve">
     <value>Minecraft profile folder seems to be not valid.</value>
   </data>