diff --git a/x86_64.config b/x86_64.config
index 27444fcdab..e6bcf9e0c8 100644
--- a/x86_64.config
+++ b/x86_64.config
@@ -4,8 +4,8 @@ CONFIG_TARGET_x86_64=y
 CONFIG_TARGET_x86_64_DEVICE_generic=y
 
 # Set Firmware Size
-CONFIG_TARGET_KERNEL_PARTSIZE=512
-CONFIG_TARGET_ROOTFS_PARTSIZE=10240
+CONFIG_TARGET_KERNEL_PARTSIZE=128
+CONFIG_TARGET_ROOTFS_PARTSIZE=4096
 
 # Firmware Type
 # CONFIG_GRUB_CONSOLE is not set