diff --git a/Src/CSharpier/FileReader.cs b/Src/CSharpier/FileReader.cs
index b185b6ba4..2da9260ce 100644
--- a/Src/CSharpier/FileReader.cs
+++ b/Src/CSharpier/FileReader.cs
@@ -9,39 +9,50 @@ namespace CSharpier
 {
     public static class FileReader
     {
+        private static readonly SemaphoreSlim Semaphore = new(10);
+
         static FileReader()
         {
             Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
         }
 
-#pragma warning disable 1998
         public static async Task<FileReaderResult> ReadFile(
-#pragma warning restore 1998
             string filePath,
             IFileSystem fileSystem,
             CancellationToken cancellationToken
         ) {
             var defaultedEncoding = false;
 
-            using var fileStream = fileSystem.File.OpenRead(filePath);
-            var detectionResult = CharsetDetector.DetectFromStream(fileStream);
-            var encoding = detectionResult?.Detected?.Encoding;
-            if (encoding == null)
+            await Semaphore.WaitAsync(cancellationToken);
+            try
             {
-                defaultedEncoding = true;
-                encoding = Encoding.Default;
-            }
+                await using var fileStream = fileSystem.File.OpenRead(filePath);
+                var detectionResult = CharsetDetector.DetectFromStream(fileStream);
+                var encoding = detectionResult?.Detected?.Encoding;
+                if (encoding == null)
+                {
+                    defaultedEncoding = true;
+                    encoding = Encoding.Default;
+                }
+
+                fileStream.Seek(0, SeekOrigin.Begin);
 
-            fileStream.Seek(0, SeekOrigin.Begin);
+                // this fixes an issue with ANSI encoded files like csharpier-repos\AutoMapper\src\UnitTests\Internationalization.cs
+                var encodingToRead = encoding.CodePage == 852
+                    ? Encoding.GetEncoding(1252)
+                    : encoding;
 
-            // this fixes an issue with ANSI encoded files like csharpier-repos\AutoMapper\src\UnitTests\Internationalization.cs
-            var encodingToRead = encoding.CodePage == 852 ? Encoding.GetEncoding(1252) : encoding;
+                using var streamReader = new StreamReader(fileStream, encodingToRead);
 
-            using var streamReader = new StreamReader(fileStream, encodingToRead);
+                var fileContents = await streamReader.ReadToEndAsync();
 
-            var fileContents = streamReader.ReadToEnd();
+                return new FileReaderResult(encoding, fileContents, defaultedEncoding);
+            }
 
-            return new FileReaderResult(encoding, fileContents, defaultedEncoding);
+            finally
+            {
+                Semaphore.Release();
+            }
         }
     }