diff --git a/src/ImageSharp/Formats/Gif/Sections/GifGraphicsControlExtension.cs b/src/ImageSharp/Formats/Gif/Sections/GifGraphicsControlExtension.cs
index 230c9cca2d..53dd055fa8 100644
--- a/src/ImageSharp/Formats/Gif/Sections/GifGraphicsControlExtension.cs
+++ b/src/ImageSharp/Formats/Gif/Sections/GifGraphicsControlExtension.cs
@@ -31,7 +31,7 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// <summary>
         /// Gets the size of the block.
         /// </summary>
-        public int BlockSize { get; }
+        public byte BlockSize { get; }
 
         /// <summary>
         /// Gets the packed disposalMethod and transparencyFlag value.