diff --git a/src/store/object_store.rs b/src/store/object_store.rs
index c428f92..b6a82a1 100644
--- a/src/store/object_store.rs
+++ b/src/store/object_store.rs
@@ -225,7 +225,7 @@ impl Store for ObjectStore {
     where
         Reader: AsyncRead + Unpin + 'static,
     {
-        self.save_stream(ReaderStream::new(reader), content_type)
+        self.save_stream(ReaderStream::with_capacity(reader, 1024 * 16), content_type)
             .await
     }