diff --git a/desktop/scripts/build-utils.tsx b/desktop/scripts/build-utils.tsx
index 41f5b78f8..16db7ab6d 100644
--- a/desktop/scripts/build-utils.tsx
+++ b/desktop/scripts/build-utils.tsx
@@ -243,7 +243,7 @@ export async function moveServerSourceMaps(
     await fs.ensureDir(sourceMapFolder);
     // TODO: Remove me
     // Create an empty file not satisfy Sandcastle. Remove it once Sandcastle no longer requires the file
-    await fs.writeFile(path.join(sourceMapFolder, 'bundle.map'), '');
+    await fs.writeFile(path.join(sourceMapFolder, 'bundle.map'), '{}');
     await fs.move(
       rendererBundleMap,
       path.join(sourceMapFolder, 'main.bundle.map'),