diff --git a/packages/turso-sync-js/src/js_protocol_io.rs b/packages/turso-sync-js/src/js_protocol_io.rs
index 40044f6d2..fffd7d026 100644
--- a/packages/turso-sync-js/src/js_protocol_io.rs
+++ b/packages/turso-sync-js/src/js_protocol_io.rs
@@ -14,7 +14,7 @@ pub enum JsProtocolRequest {
     Http {
         method: String,
         path: String,
-        body: Option<Buffer>,
+        body: Option<Vec<u8>>,
     },
     FullRead {
         path: String,
@@ -134,7 +134,7 @@ impl ProtocolIO for JsProtocolIo {
         Ok(self.add_request(JsProtocolRequest::Http {
             method: method.to_string(),
             path: path.to_string(),
-            body: body.map(Buffer::from),
+            body,
         }))
     }
 
diff --git a/packages/turso-sync-js/sync_engine.ts b/packages/turso-sync-js/sync_engine.ts
index 4a001dfae..dac182a76 100644
--- a/packages/turso-sync-js/sync_engine.ts
+++ b/packages/turso-sync-js/sync_engine.ts
@@ -66,7 +66,7 @@ async function process(opts, request) {
             const response = await fetch(`${opts.url}${requestType.path}`, {
                 method: requestType.method,
                 headers: opts.headers,
-                body: requestType.body
+                body: requestType.body != null ? new Uint8Array(requestType.body) : null,
             });
             completion.status(response.status);
             const reader = response.body.getReader();