Update index.js

index.js

@@ -504,8 +504,9 @@ async function upscaleImage(images) {
           colorEnhance: true, // enhance colors
         });
 
-        const upscaledTensor = await tfjs.node.encodePng(tensor);
-        const arrayBuffer = await upscaledTensor.arrayBuffer();
+        const upscaledTensor = await tfjs.node.encodePng(tensor)
+        const typedArray = await upscaledTensor.data();
+        const arrayBuffer = Buffer.from(typedArray);
 
         // dispose the tensors!
         image.dispose();