diff --git a/PiwigoDirectorySync/PiwigoDirectorySync.csproj b/PiwigoDirectorySync/PiwigoDirectorySync.csproj
index 0eab756..8c997ec 100644
--- a/PiwigoDirectorySync/PiwigoDirectorySync.csproj
+++ b/PiwigoDirectorySync/PiwigoDirectorySync.csproj
@@ -19,12 +19,12 @@
         <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="7.0.10"/>
         <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="7.0.10"/>
         <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="7.0.0" />
-        <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="7.0.0"/>
+        <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="7.0.4" />
         <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="7.0.0"/>
         <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="7.0.0"/>
         <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="7.0.0" />
         <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="7.0.0" />
-        <PackageReference Include="Piwigo.Client" Version="0.1.0.17"/>
+        <PackageReference Include="Piwigo.Client" Version="0.1.0.19" />
         <PackageReference Include="Spectre.Console.Analyzer" Version="0.47.0">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/PiwigoDirectorySync/Services/ImageSynchronizer.cs b/PiwigoDirectorySync/Services/ImageSynchronizer.cs
index b149dc1..68c5365 100644
--- a/PiwigoDirectorySync/Services/ImageSynchronizer.cs
+++ b/PiwigoDirectorySync/Services/ImageSynchronizer.cs
@@ -36,6 +36,31 @@ public class ImageSynchronizer : IImageSynchronizer
 
         await GetImageIdsFromServerAsync(piwigoClient, piwigoServer, ct);
         await UploadNewImagesToServerAsync(piwigoClient, piwigoServer, ct);
+        await UploadChangedImagesToServerAsync(piwigoClient, piwigoServer, ct);
+    }
+
+    private async Task UploadChangedImagesToServerAsync(IPiwigoClient piwigoClient, ServerEntity piwigoServer, CancellationToken ct)
+    {
+        var imagesToUpload = await _persistenceContext.PiwigoImages.Include(i => i.Album)
+            .Where(i => i.ServerImageId != null && i.Album.ServerId == piwigoServer.Id && i.UploadRequired)
+            .ToListAsync(ct);
+
+        _logger.LogInformation("Updating {Count} images", imagesToUpload.Count);
+
+        foreach (var imageEntity in imagesToUpload)
+        {
+            var fileInfo = new FileInfo(Path.Combine(piwigoServer.RootDirectory, imageEntity.FilePath));
+            var imageUpload = GetImageUpload(imageEntity, fileInfo.CreationTime);
+            var imageUploaded = await piwigoClient.UploadImageAsync(fileInfo, imageUpload, ct);
+
+            imageEntity.ServerImageId = imageUploaded.ImageId;
+            imageEntity.UploadRequired = false;
+
+            _logger.LogInformation("Updated image {ImageEntityName} ({ImageEntityId}) on piwigo server with id {ImageEntityServerImageId}", imageEntity.Name, imageEntity.Id,
+                imageEntity.ServerImageId);
+
+            await _persistenceContext.SaveChangesAsync(ct);
+        }
     }
 
     private async Task UploadNewImagesToServerAsync(IPiwigoClient piwigoClient, ServerEntity piwigoServer, CancellationToken ct)
@@ -44,6 +69,8 @@ public class ImageSynchronizer : IImageSynchronizer
             .Where(i => i.ServerImageId == null && i.Album.ServerId == piwigoServer.Id)
             .ToListAsync(ct);
 
+        _logger.LogInformation("Uploading {Count} images", imagesToUpload.Count);
+
         foreach (var imageEntity in imagesToUpload)
         {
             var fileInfo = new FileInfo(Path.Combine(piwigoServer.RootDirectory, imageEntity.FilePath));
@@ -79,6 +106,8 @@ public class ImageSynchronizer : IImageSynchronizer
             .Where(i => i.ServerImageId == null && i.Album.ServerId == piwigoServer.Id)
             .ToListAsync(ct);
 
+        _logger.LogInformation("Checking {Count} images if they exist", imagesToSearch.Count);
+
         var md5SumsToCheck = imagesToSearch.Where(i => i.Md5Sum != null).DistinctBy(i => i.Md5Sum).ToDictionary(i => i.Md5Sum!, i => i, StringComparer.OrdinalIgnoreCase);
 
         var processedImages = 0;
@@ -91,6 +120,8 @@ public class ImageSynchronizer : IImageSynchronizer
             {
                 var imageEntity = md5SumsToCheck[existingImage.Key];
                 imageEntity.ServerImageId = existingImage.Value;
+                imageEntity.UploadRequired = false;
+
                 _logger.LogInformation("Found image {ImageEntityName} ({ImageEntityId}) on piwigo server with id {ImageEntityServerImageId}", imageEntity.Name, imageEntity.Id,
                     imageEntity.ServerImageId);
             }