diff --git a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/HunterLabToCieXyzConverter.cs b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/HunterLabToCieXyzConverter.cs
index ead2f37d85..424b43b129 100644
--- a/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/HunterLabToCieXyzConverter.cs
+++ b/src/ImageSharp/ColorSpaces/Conversion/Implementation/Converters/HunterLabToCieXyzConverter.cs
@@ -9,7 +9,7 @@ namespace SixLabors.ImageSharp.ColorSpaces.Conversion
     /// <summary>
     /// Color converter between <see cref="HunterLab"/> and <see cref="CieXyz"/>
     /// </summary>
-    internal class HunterLabToCieXyzConverter : CieXyzAndHunterLabConverterBase
+    internal sealed class HunterLabToCieXyzConverter : CieXyzAndHunterLabConverterBase
     {
         /// <summary>
         /// Performs the conversion from the <see cref="HunterLab"/> input to an instance of <see cref="CieXyz"/> type.