diff --git a/src/ImageSharp/Formats/Jxl/Metadata/JxlExifOrientation.cs b/src/ImageSharp/Formats/Jxl/Metadata/JxlExifOrientation.cs
index 9146c2bfa2..b5f52d67fe 100644
--- a/src/ImageSharp/Formats/Jxl/Metadata/JxlExifOrientation.cs
+++ b/src/ImageSharp/Formats/Jxl/Metadata/JxlExifOrientation.cs
@@ -3,7 +3,7 @@
 
 namespace SixLabors.ImageSharp.Formats.Jxl.Metadata;
 
-internal enum JxlExifOrientation
+internal enum JxlExifOrientation : byte
 {
     Identity = 1,
     FlipHorizontal = 2,
diff --git a/src/ImageSharp/Formats/Jxl/Metadata/JxlExtraChannel.cs b/src/ImageSharp/Formats/Jxl/Metadata/JxlExtraChannel.cs
index d8e62dc931..1fb39d8604 100644
--- a/src/ImageSharp/Formats/Jxl/Metadata/JxlExtraChannel.cs
+++ b/src/ImageSharp/Formats/Jxl/Metadata/JxlExtraChannel.cs
@@ -3,7 +3,7 @@
 
 namespace SixLabors.ImageSharp.Formats.Jxl.Metadata;
 
-internal enum JxlExtraChannel
+internal enum JxlExtraChannel : byte
 {
     Alpha,
     Depth,
diff --git a/src/ImageSharp/Formats/Jxl/Splines/JxlSplineEntropyContext.cs b/src/ImageSharp/Formats/Jxl/Splines/JxlSplineEntropyContext.cs
index 1daa61bf76..adb619f5ff 100644
--- a/src/ImageSharp/Formats/Jxl/Splines/JxlSplineEntropyContext.cs
+++ b/src/ImageSharp/Formats/Jxl/Splines/JxlSplineEntropyContext.cs
@@ -3,7 +3,7 @@
 
 namespace SixLabors.ImageSharp.Formats.Jxl.Splines;
 
-internal enum JxlSplineEntropyContext
+internal enum JxlSplineEntropyContext : byte
 {
     QuantizationAdjustment,
     StartingPosition,