diff --git a/starlette/responses.py b/starlette/responses.py
index 9dbe03beb..1f9c43a21 100644
--- a/starlette/responses.py
+++ b/starlette/responses.py
@@ -248,7 +248,7 @@ async def wrap(func: typing.Callable[[], typing.Coroutine]) -> None:
 
 
 class FileResponse(Response):
-    chunk_size = 4096
+    chunk_size = 64 * 1024
 
     def __init__(
         self,