diff --git a/src/components/app/index.tsx b/src/components/app/index.tsx
index 80103d7b..3588cac5 100644
--- a/src/components/app/index.tsx
+++ b/src/components/app/index.tsx
@@ -28,11 +28,12 @@ export default class App extends Component<Props, State> {
   private async getImageData(bitmap: ImageBitmap): Promise<ImageData> {
     // Make canvas same size as image
     const canvas = document.createElement('canvas');
-    [canvas.width, canvas.height] = [bitmap.width, bitmap.height];
+    canvas.width = bitmap.width;
+    canvas.height = bitmap.height;
     // Draw image onto canvas
     const ctx = canvas.getContext('2d');
     if (!ctx) {
-      throw new Error("Could not create canvas contex");
+      throw new Error("Could not create canvas context");
     }
     ctx.drawImage(bitmap, 0, 0);
     return ctx.getImageData(0, 0, bitmap.width, bitmap.height);