diff --git a/source/module/monitor_kernel_lib.c b/source/module/monitor_kernel_lib.c
index bc6b616..48ee89f 100644
--- a/source/module/monitor_kernel_lib.c
+++ b/source/module/monitor_kernel_lib.c
@@ -206,7 +206,7 @@ int monitor_init(void) {
   if (ret)
     return ret;
   //!todo
-  ret = init_buffer(500 * 1024 * 1024); // 50M
+  ret = init_buffer(512 * 1024 * 1024); // 512M
   if (ret)
     return -1;
   return 0;
diff --git a/source/ucli/ucli.cc b/source/ucli/ucli.cc
index 1a2d1be..0c2cc57 100644
--- a/source/ucli/ucli.cc
+++ b/source/ucli/ucli.cc
@@ -68,7 +68,8 @@ static void do_extract(char *buf, int len) {
 }
 
 static void do_dump(const char *arg) {
-  static char variant_buf[500 * 1024 * 1024];
+  //!todo
+  static char variant_buf[512 * 1024 * 1024];
   int len;
   int ret = 0;