diff --git a/UtilitatPdf/MainWindow.xaml b/UtilitatPdf/MainWindow.xaml
index faa5ac4..36e8ce2 100644
--- a/UtilitatPdf/MainWindow.xaml
+++ b/UtilitatPdf/MainWindow.xaml
@@ -6,7 +6,8 @@
         xmlns:local="clr-namespace:UtilitatPdf"
         mc:Ignorable="d"
         Loaded="Window_Loaded"
-        Title="Utilitats Pdf" Height="450" Width="550" Icon="pdf.ico" WindowStartupLocation="CenterScreen" ResizeMode="NoResize">
+        ContentRendered="CheckNewUpdates"
+        Title="UtilitatPdf 1.2" Height="450" Width="550" Icon="pdf.ico" WindowStartupLocation="CenterScreen" ResizeMode="NoResize">
     <Window.Resources>
         <Style x:Key="Opacity1" TargetType="Image">
             <Style.Triggers>
@@ -101,7 +102,7 @@
                     <TextBlock Margin="50,10,0,0">- S'afegirà '-sense-signatura' al nom del fitxer i es desarà a la mateixa carpeta que</TextBlock>
                     <TextBlock Margin="60,5,0,0"> l'original.</TextBlock>
                     <CheckBox x:Name="CheckKeepSignature" Content="Mantenir signatures originals" Margin="20,20,0,0" HorizontalAlignment="Left"/>
-                    <TextBlock Margin="50,10,0,0">- Si s'activa, s’editaran les signatures però Adobe Reader donarà error de signatures</TextBlock>
+                    <TextBlock Margin="50,10,0,0">- Si s'activa, s’editaran les signatures, però Adobe Reader donarà error de signatures</TextBlock>
                     <TextBlock Margin="60,5,0,0">degut a que l'arxiu s'ha modificat desprès d’haver-lo signat.</TextBlock>
                     <Button Margin="0,20,0,0" Height="30" Width="180" HorizontalAlignment="Center" Click="RemoveSign_Button_Click">Treure Signatura</Button>
                 </StackPanel>
diff --git a/UtilitatPdf/MainWindow.xaml.cs b/UtilitatPdf/MainWindow.xaml.cs
index 8b0a7ff..c6d51ee 100644
--- a/UtilitatPdf/MainWindow.xaml.cs
+++ b/UtilitatPdf/MainWindow.xaml.cs
@@ -18,8 +18,7 @@ using Rectangle = iText.Kernel.Geom.Rectangle;
 using System.Windows.Controls;
 using Canvas = iText.Layout.Canvas;
 using System.Collections.ObjectModel;
-using System.Collections.Generic;
-using System.Linq;
+using UtilitatPdf.CheckUpdates;
 
 namespace UtilitatPdf
 {
@@ -34,6 +33,22 @@ namespace UtilitatPdf
         {
             InitializeComponent();
         }
+        async void CheckNewUpdates(object sender, EventArgs e)
+        {
+            Updater needUpdate = new Updater();
+
+            if (needUpdate.IsNewerVersion)
+            {
+
+                MessageBoxResult result = MessageBox.Show("Hay disponible una nueva version de la aplicacion.\n" + needUpdate.NewReleaseVersion + "\nQuiere Instalarla ahora?", "Actualización", MessageBoxButton.YesNo, MessageBoxImage.Question);
+                if (result == MessageBoxResult.Yes)
+                {
+                    await needUpdate.DownloadReleaseAsync();
+                    if (needUpdate.DownloadComplete) needUpdate.UpdateSelf();
+                }
+            }
+        }
+
         #region ButtonText
         private void SelectOpenFile_Button_Click(object sender, RoutedEventArgs e)
         {
@@ -241,6 +256,7 @@ namespace UtilitatPdf
         {
             string patronCif = @"([a-zA-Z]-?[0-9]{8})";
             string patronNif = @"([0-9]{8}-?[a-zA-Z])";
+            string replaceWith = "<NIF_EDITAT>";
             string cleanRegex = string.Empty;
             string widgetText = string.Empty;
             bool doneOk = false;
@@ -273,9 +289,8 @@ namespace UtilitatPdf
 
                             if (matchesCif.Count > 0 || matchesNif.Count > 0)
                             {
-
-                                cleanRegex = Regex.Replace(widgetText, patronCif, "<NIF_EDITAT>");
-                                cleanRegex = Regex.Replace(cleanRegex, patronNif, "<NIF_EDITAT>");
+                                cleanRegex = Regex.Replace(widgetText, patronCif, replaceWith);
+                                cleanRegex = Regex.Replace(cleanRegex, patronNif, replaceWith);
 
                                 PdfArray annotationRect = pdfWidgetAnnotation.GetRectangle();
                                 pdfWidgetAnnotation.SetRectangle(annotationRect);
@@ -334,7 +349,6 @@ namespace UtilitatPdf
             OutSignFile.IsEnabled = true;
             SelectFile6.IsEnabled = true;
         }
-
     } // END Window Class
 
 } // END Namespace
diff --git a/UtilitatPdf/Updater/Gitea.cs b/UtilitatPdf/Updater/Gitea.cs
new file mode 100644
index 0000000..82a997a
--- /dev/null
+++ b/UtilitatPdf/Updater/Gitea.cs
@@ -0,0 +1,136 @@
+using System;
+using System.Collections.Generic;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using System.Globalization;
+
+namespace UtilitatPdf.CheckUpdates
+{
+    public partial class Gitea
+    {
+        [JsonProperty("id")]
+        public long Id { get; set; }
+
+        [JsonProperty("tag_name")]
+        public string TagName { get; set; }
+
+        [JsonProperty("target_commitish")]
+        public string TargetCommitish { get; set; }
+
+        [JsonProperty("name")]
+        public string Name { get; set; }
+
+        [JsonProperty("body")]
+        public string Body { get; set; }
+
+        [JsonProperty("url")]
+        public Uri Url { get; set; }
+
+        [JsonProperty("html_url")]
+        public Uri HtmlUrl { get; set; }
+
+        [JsonProperty("tarball_url")]
+        public Uri TarballUrl { get; set; }
+
+        [JsonProperty("zipball_url")]
+        public Uri ZipballUrl { get; set; }
+
+        [JsonProperty("draft")]
+        public bool Draft { get; set; }
+
+        [JsonProperty("prerelease")]
+        public bool Prerelease { get; set; }
+
+        [JsonProperty("created_at")]
+        public DateTimeOffset CreatedAt { get; set; }
+
+        [JsonProperty("published_at")]
+        public DateTimeOffset PublishedAt { get; set; }
+
+        [JsonProperty("author")]
+        public Author Author { get; set; }
+
+        [JsonProperty("assets")]
+        public List<Asset> Assets { get; set; }
+    }
+
+    public partial class Asset
+    {
+        [JsonProperty("id")]
+        public long Id { get; set; }
+
+        [JsonProperty("name")]
+        public string Name { get; set; }
+
+        [JsonProperty("size")]
+        public long Size { get; set; }
+
+        [JsonProperty("download_count")]
+        public long DownloadCount { get; set; }
+
+        [JsonProperty("created_at")]
+        public DateTimeOffset CreatedAt { get; set; }
+
+        [JsonProperty("uuid")]
+        public Guid Uuid { get; set; }
+
+        [JsonProperty("browser_download_url")]
+        public Uri BrowserDownloadUrl { get; set; }
+    }
+
+    public partial class Author
+    {
+        [JsonProperty("id")]
+        public long Id { get; set; }
+
+        [JsonProperty("login")]
+        public string Login { get; set; }
+
+        [JsonProperty("full_name")]
+        public string FullName { get; set; }
+
+        [JsonProperty("email")]
+        public string Email { get; set; }
+
+        [JsonProperty("avatar_url")]
+        public Uri AvatarUrl { get; set; }
+
+        [JsonProperty("language")]
+        public string Language { get; set; }
+
+        [JsonProperty("is_admin")]
+        public bool IsAdmin { get; set; }
+
+        [JsonProperty("last_login")]
+        public DateTimeOffset LastLogin { get; set; }
+
+        [JsonProperty("created")]
+        public DateTimeOffset Created { get; set; }
+
+        [JsonProperty("username")]
+        public string Username { get; set; }
+    }
+
+    public partial class Gitea
+    {
+        public static List<Gitea> FromJson(string json) => JsonConvert.DeserializeObject<List<Gitea>>(json, UtilitatPdf.CheckUpdates.Converter.Settings);
+    }
+
+    public static class Serialize
+    {
+        public static string ToJson(this List<Gitea> self) => JsonConvert.SerializeObject(self, UtilitatPdf.CheckUpdates.Converter.Settings);
+    }
+
+    internal static class Converter
+    {
+        public static readonly JsonSerializerSettings Settings = new JsonSerializerSettings
+        {
+            MetadataPropertyHandling = MetadataPropertyHandling.Ignore,
+            DateParseHandling = DateParseHandling.None,
+            Converters =
+            {
+                new IsoDateTimeConverter { DateTimeStyles = DateTimeStyles.AssumeUniversal }
+            },
+        };
+    }
+}
diff --git a/UtilitatPdf/Updater/Updater.cs b/UtilitatPdf/Updater/Updater.cs
new file mode 100644
index 0000000..5f37d7d
--- /dev/null
+++ b/UtilitatPdf/Updater/Updater.cs
@@ -0,0 +1,150 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Net;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using Path = System.IO.Path;
+
+namespace UtilitatPdf.CheckUpdates
+{
+    class Updater
+    {
+        public bool IsNewerVersion { get; private set; }
+        public string NewReleaseVersion { get; private set; }
+        public float DownloadProgress { get; private set; }
+        public long BytesReceived { get; private set; }
+        public long RemainingBytes { get; private set; }
+        public string UserState { get; private set; }
+        public bool DownloadComplete { get { return _downloadComplete; } private set { value = _downloadComplete; } }
+        public string CurrentVersion { get { return _currentVersion; } }
+
+        private static string _currentVersion = "1.2";
+        private string _downloadRelease = _currentVersion;
+        private static HttpClient Client = new HttpClient();
+        private Uri _urlDescarga = null;
+        private bool _downloadComplete = false;
+        private List<Gitea> llistaIds = new List<Gitea>();
+        private static string self = Process.GetCurrentProcess().MainModule.FileName;
+        private static string selfFileName = Path.GetFileName(self);
+        private static string selfWithoutExt = Path.Combine(Path.GetDirectoryName(self), Path.GetFileNameWithoutExtension(self));
+
+
+        public Updater()
+        {
+            this.GetItems();
+            this.CheckForUpdates();
+        }
+        private void CheckForUpdates()
+        {
+            foreach (Gitea releases in llistaIds)
+            {
+                var version1 = new Version(_downloadRelease);
+                var version2 = new Version(releases.TagName);
+
+                var result = version1.CompareTo(version2);
+
+                if (result < 0)
+                {
+                    _downloadRelease = releases.TagName;
+                    List<Asset> assets = releases.Assets;
+                    foreach (Asset asset in assets)
+                    {
+                        _urlDescarga = asset.BrowserDownloadUrl;
+                    }
+                }
+            }
+            if (_currentVersion != _downloadRelease)
+            {
+                IsNewerVersion = true;
+                NewReleaseVersion = _downloadRelease;
+            }
+        }
+        private void GetItems()
+        {
+            string url = $"https://git.vconesa.net/api/v1/repos/amorfo77/UtilitatPdf/releases";
+            var request = (HttpWebRequest)WebRequest.Create(url);
+            request.Method = "GET";
+            request.ContentType = "application/json";
+            request.Accept = "application/json";
+
+            try
+            {
+                using (WebResponse response = request.GetResponse())
+                {
+                    using (Stream strReader = response.GetResponseStream())
+                    {
+                        if (strReader == null) return;
+                        using (StreamReader objReader = new StreamReader(strReader))
+                        {
+                            string responseBody = objReader.ReadToEnd();
+                            llistaIds = Gitea.FromJson(responseBody);
+                        }
+                    }
+                }
+            }
+            catch (WebException)
+            {
+                throw new WebException();
+            }
+        }
+        public async Task DownloadReleaseAsync()
+        {
+            _downloadComplete = false;
+            try
+            {
+                var response = await Client.GetAsync(_urlDescarga);
+                response.EnsureSuccessStatusCode();
+
+                using (var stream = await response.Content.ReadAsStreamAsync())
+                {
+                    var fileInfo = new FileInfo(selfWithoutExt + "Update.exe");
+                    using (var fileStream = fileInfo.OpenWrite())
+                    {
+                        await stream.CopyToAsync(fileStream);
+                    }
+                }
+                _downloadComplete = true;
+            }
+            catch (Exception)
+            {
+                throw new Exception();
+            }
+        }
+        public void UpdateSelf()
+        {
+            if (Environment.OSVersion.Platform == PlatformID.Unix ||
+                    Environment.OSVersion.Platform == PlatformID.MacOSX)
+            {
+                Process.Start(self);
+
+                // Sleep for half a second to avoid an exception
+                Thread.Sleep(500);
+                Environment.Exit(0);
+            }
+            else
+            {
+                using (var batFile = new StreamWriter(File.Create(selfWithoutExt + "Update.bat")))
+                {
+                    batFile.WriteLine("@ECHO OFF");
+                    batFile.WriteLine("TIMEOUT /t 1 /nobreak > NUL");
+                    batFile.WriteLine("TASKKILL /IM \"{0}\" > NUL", selfFileName);
+                    batFile.WriteLine("MOVE \"{0}\" \"{1}\"", selfWithoutExt + "Update.exe", self);
+                    batFile.WriteLine("DEL \"%~f0\" & START \"\" /B \"{0}\"", self);
+                }
+
+                ProcessStartInfo startInfo = new ProcessStartInfo(selfWithoutExt + "Update.bat");
+                // Hide the terminal window
+                startInfo.CreateNoWindow = true;
+                startInfo.UseShellExecute = false;
+                startInfo.WorkingDirectory = Path.GetDirectoryName(self);
+                Process.Start(startInfo);
+
+                Environment.Exit(0);
+            }
+        }
+
+    }
+}