diff --git a/src/dev/app.tsx b/src/dev/app.tsx
index e33dce8..d9e2f92 100644
--- a/src/dev/app.tsx
+++ b/src/dev/app.tsx
@@ -76,6 +76,7 @@ const App = () => {
   const previewStyle = {
     width: `${width * scale}px`,
     height: `${height * scale}px`,
+    backgroundColor: "transparent",
     backgroundImage: `url('${spriteUrl}')`,
     backgroundSize: `${sheetWidth * scale}px ${sheetHeight * scale}px`,
     animation: `${keyframeId} ${totalDuration}ms steps(${frames}) infinite`,