diff --git a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/CMakeListsDetector.cs b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/CMakeListsDetector.cs
index f037445..49358a5 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/CMakeListsDetector.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/CMakeListsDetector.cs
@@ -30,6 +30,7 @@ public sealed class CMakeListsDetector : IConfusedFormatDetector
     {
         if (string.IsNullOrWhiteSpace(text)) return false;
 
-        return "CMakeLists.txt".Equals(Path.GetFileName(path), StringComparison.OrdinalIgnoreCase);
+        var fileName = Path.GetFileName(path).AsSpan();
+        return "CMakeLists.txt".AsSpan().Equals(fileName, StringComparison.OrdinalIgnoreCase);
     }
 }
diff --git a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/DockerfileDetector.cs b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/DockerfileDetector.cs
index e398360..23c2a66 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/DockerfileDetector.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/DockerfileDetector.cs
@@ -30,6 +30,7 @@ public sealed class DockerfileDetector : IFormatDetector
     {
         if (string.IsNullOrWhiteSpace(text)) return false;
 
-        return "Dockerfile".Equals(Path.GetFileName(path), StringComparison.OrdinalIgnoreCase);
+        var fileName = Path.GetFileName(path).AsSpan();
+        return "Dockerfile".AsSpan().Equals(fileName, StringComparison.OrdinalIgnoreCase);
     }
 }
diff --git a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/HostsDetector.cs b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/HostsDetector.cs
index 1d9f3a9..ca2cb4e 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/HostsDetector.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/HostsDetector.cs
@@ -30,6 +30,7 @@ public sealed class HostsDetector : IFormatDetector
     {
         if (string.IsNullOrWhiteSpace(text)) return false;
 
-        return "hosts".Equals(Path.GetFileName(path), StringComparison.OrdinalIgnoreCase);
+        var fileName = Path.GetFileName(path).AsSpan();
+        return "hosts".AsSpan().Equals(fileName, StringComparison.OrdinalIgnoreCase);
     }
 }
diff --git a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/MakefileDetector.cs b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/MakefileDetector.cs
index e96386d..bb62d6c 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/MakefileDetector.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.TextViewer/Detectors/MakefileDetector.cs
@@ -30,6 +30,7 @@ public sealed class MakefileDetector : IFormatDetector
     {
         if (string.IsNullOrWhiteSpace(text)) return false;
 
-        return "Makefile".Equals(Path.GetFileName(path), StringComparison.OrdinalIgnoreCase);
+        var fileName = Path.GetFileName(path).AsSpan();
+        return "Makefile".AsSpan().Equals(fileName, StringComparison.OrdinalIgnoreCase);
     }
 }