diff --git a/MCPForUnity/Editor/Services/Transport/Transports/WebSocketTransportClient.cs b/MCPForUnity/Editor/Services/Transport/Transports/WebSocketTransportClient.cs
index ae62aafa..f2beb1f4 100644
--- a/MCPForUnity/Editor/Services/Transport/Transports/WebSocketTransportClient.cs
+++ b/MCPForUnity/Editor/Services/Transport/Transports/WebSocketTransportClient.cs
@@ -345,7 +345,7 @@ private async Task<string> ReceiveMessageAsync(CancellationToken token)
                 return null;
             }
 
-            byte[] rentedBuffer = ArrayPool<byte>.Shared.Rent(8192);
+            byte[] rentedBuffer = System.Buffers.ArrayPool<byte>.Shared.Rent(8192);
             var buffer = new ArraySegment<byte>(rentedBuffer);
             using var ms = new MemoryStream(8192);
 
@@ -381,7 +381,7 @@ private async Task<string> ReceiveMessageAsync(CancellationToken token)
             }
             finally
             {
-                ArrayPool<byte>.Shared.Return(rentedBuffer);
+                System.Buffers.ArrayPool<byte>.Shared.Return(rentedBuffer);
             }
         }
 
diff --git a/MCPForUnity/Runtime/Helpers/ScreenshotUtility.cs b/MCPForUnity/Runtime/Helpers/ScreenshotUtility.cs
index 81cefa31..1408f219 100644
--- a/MCPForUnity/Runtime/Helpers/ScreenshotUtility.cs
+++ b/MCPForUnity/Runtime/Helpers/ScreenshotUtility.cs
@@ -41,7 +41,9 @@ public static ScreenshotCaptureResult CaptureToAssetsFolder(string fileName = nu
 
             // Use only the file name to let Unity decide the final location (per CaptureScreenshot docs).
             string captureName = Path.GetFileName(normalizedFullPath);
+#if UNITY_2022_1_OR_NEWER
             ScreenCapture.CaptureScreenshot(captureName, size);
+#endif
 
             Debug.Log($"Screenshot requested: file='{captureName}' intendedFullPath='{normalizedFullPath}' persistentDataPath='{Application.persistentDataPath}'");