diff --git a/src/app/FTPServer.h b/src/app/FTPServer.h
index 6257351..01448b9 100644
--- a/src/app/FTPServer.h
+++ b/src/app/FTPServer.h
@@ -6,7 +6,7 @@
 #include "definition.h"
 #include "Dictionary.h"
 //#define DEBUG_FTPS
-#define READ_BUFFER_SIZE 2500 //2500 is max to read sd card, more will crash
+#define READ_BUFFER_SIZE 2048 //2048 is max to read sd card, more will crash
 
 template <typename T>
 class FTPServer : public TCPServer<T>