diff --git a/kernel/hal/x86_64/gdt.c b/kernel/hal/x86_64/gdt.c
index e69c7e8..6e15619 100644
--- a/kernel/hal/x86_64/gdt.c
+++ b/kernel/hal/x86_64/gdt.c
@@ -7,7 +7,7 @@
 #define GDT_PRESENT 0x80
 #define GDT_TSS     0x89
 
-#define KSTACK (1024*2*4096)
+#define KSTACK (1024*4*4096)
 ALIGNED(16) static uint8_t kernelstack[KSTACK];
 
 typedef struct {