diff --git a/src/main.ts b/src/main.ts
index 2ab03a4..9bd9ed6 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -63,7 +63,7 @@ export default class DiscourseSyncPlugin extends Plugin {
 						const response = await fetch(url, {
 							method: "POST",
 							body: formData,
-							headers,
+							headers: new Headers(headers),
 						});
 
 						console.log(`Upload Image response: ${response.status}`);