diff --git a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/XMLDetector.cs b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/XMLDetector.cs
index 1fa5fba..22367bb 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/XMLDetector.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/XMLDetector.cs
@@ -21,7 +21,7 @@ namespace QuickLook.Plugin.TextViewer.Detectors;
 
 public sealed class XMLDetector : IFormatDetector
 {
-    internal Regex Signature { get; } = new(@"<\?xml\b[^>]*\bversion\s*=\s*""[^""]*""[^\?>]*\?>", RegexOptions.IgnoreCase);
+    internal Regex Signature { get; } = new(@"<\?xml\b[^>]*\bversion\s*=\s*(['""])[^'""]*\1[^\?>]*\?>", RegexOptions.IgnoreCase);
 
     public string Name => "XML";