diff --git a/include/arch/amd64/mm/heap.h b/include/arch/amd64/mm/heap.h
index 23255a0..e8e8716 100644
--- a/include/arch/amd64/mm/heap.h
+++ b/include/arch/amd64/mm/heap.h
@@ -3,7 +3,7 @@
 #include "sys/heap.h"
 #include <stdint.h>
 
-#define KERNEL_HEAP     (512 * 1024)
+#define KERNEL_HEAP     (4 * 512 * 1024)
 
 /**
  * @brief Initialize heap instance of size `sz' at `phys_base'