diff --git a/src_features/signMessageEIP712/mem.c b/src_features/signMessageEIP712/mem.c
index 799be1f..e0c61c9 100644
--- a/src_features/signMessageEIP712/mem.c
+++ b/src_features/signMessageEIP712/mem.c
@@ -3,7 +3,7 @@
 #include "shared_context.h"
 
 
-#define SIZE_MEM_BUFFER 8192
+#define SIZE_MEM_BUFFER 5120
 
 static uint8_t  mem_buffer[SIZE_MEM_BUFFER];
 static size_t   mem_idx;