diff --git a/cloudflare-worker/src/index.js b/cloudflare-worker/src/index.js
index 895238f..e1b56f6 100644
--- a/cloudflare-worker/src/index.js
+++ b/cloudflare-worker/src/index.js
@@ -65,10 +65,7 @@ export default {
         Key: key,
       });
 
-      const presignedUrl = await getSignedUrl(client, command, {
-        expiresIn: 3600,
-        unhoistableHeaders: new Set(['x-amz-content-sha256']),
-      });
+      const presignedUrl = await getSignedUrl(client, command, { expiresIn: 3600 });
 
       return json({ url: presignedUrl, key }, 200, cors);
     } catch (err) {
diff --git a/cloudflare-worker/test/upload.test.js b/cloudflare-worker/test/upload.test.js
index 2239b33..1c98d1b 100644
--- a/cloudflare-worker/test/upload.test.js
+++ b/cloudflare-worker/test/upload.test.js
@@ -52,10 +52,7 @@ describe('R2 upload', () => {
 
     const uploadRes = await fetch(url, {
       method: 'PUT',
-      headers: {
-        'Content-Type': 'image/png',
-        'x-amz-content-sha256': 'UNSIGNED-PAYLOAD',
-      },
+      headers: { 'Content-Type': 'image/png' },
       body: IMAGE,
     });
 
diff --git a/pictures/image2.png b/pictures/image2.png
new file mode 100644
index 0000000..288175e
Binary files /dev/null and b/pictures/image2.png differ