diff --git a/src/Piwigo.Client.Tests/ImageApiTests.cs b/src/Piwigo.Client.Tests/ImageApiTests.cs
index 231acbf..c79863e 100644
--- a/src/Piwigo.Client.Tests/ImageApiTests.cs
+++ b/src/Piwigo.Client.Tests/ImageApiTests.cs
@@ -247,7 +247,7 @@ public class ImageApiTests : ApiTestsBase
         var bytes = Encoding.UTF8.GetBytes("PiwigoTestString");
         var expectedBase64 = Convert.ToBase64String(bytes);
 
-        await _imageApi.AddChunkAsync(bytes, "origSum", 0);
+        await _imageApi.AddChunkAsync("origSum", 0, bytes);
 
         CorrectMethodShouldGetCalled("pwg.images.addChunk");
 
diff --git a/src/Piwigo.Client/Images/IImageApi.cs b/src/Piwigo.Client/Images/IImageApi.cs
index 9186a7d..d89e106 100644
--- a/src/Piwigo.Client/Images/IImageApi.cs
+++ b/src/Piwigo.Client/Images/IImageApi.cs
@@ -44,13 +44,13 @@ public interface IImageApi
     ///     Adds a chunk of an image to piwigo.
     ///     This enables uploading of large images using multiple chunks of data.
     /// </summary>
-    /// <param name="data">The chunk to upload</param>
     /// <param name="originalSum">The original image checksum</param>
     /// <param name="position">The chunk position</param>
+    /// <param name="data">The chunk to upload</param>
     /// <param name="cancellationToken">
     ///     <see cref="CancellationToken" />
     /// </param>
-    Task AddChunkAsync(byte[] data, string originalSum, int position, CancellationToken cancellationToken = default);
+    Task AddChunkAsync(string originalSum, int position, byte[] data, CancellationToken cancellationToken = default);
 
     /// <summary>
     ///     Checks if piwigo is ready to get images uploaded.
diff --git a/src/Piwigo.Client/Images/ImageApi.cs b/src/Piwigo.Client/Images/ImageApi.cs
index 50443d8..a5a94af 100644
--- a/src/Piwigo.Client/Images/ImageApi.cs
+++ b/src/Piwigo.Client/Images/ImageApi.cs
@@ -32,7 +32,7 @@ public class ImageApi : IImageApi
         return response.Result.Comment.Id;
     }
 
-    public async Task AddChunkAsync(byte[] data, string originalSum, int position, CancellationToken cancellationToken = default)
+    public async Task AddChunkAsync(string originalSum, int position, byte[] data, CancellationToken cancellationToken = default)
     {
         var base64Data = Convert.ToBase64String(data);