diff --git a/target/linux/ramips/dts/kn.dts b/target/linux/ramips/dts/kn.dts
index 1f9928e59a..baa24a961f 100644
--- a/target/linux/ramips/dts/kn.dts
+++ b/target/linux/ramips/dts/kn.dts
@@ -48,7 +48,7 @@
 			partition@50000 {
 				compatible = "denx,uimage";
 				label = "firmware";
-				reg = <0x50000 0x3b0000>;
+				reg = <0x50000 0x7b0000>;
 			};
 		};
 	};
diff --git a/target/linux/ramips/image/rt305x.mk b/target/linux/ramips/image/rt305x.mk
index f59a748949..739656cc40 100644
--- a/target/linux/ramips/image/rt305x.mk
+++ b/target/linux/ramips/image/rt305x.mk
@@ -905,7 +905,7 @@ TARGET_DEVICES += xdxrn502j
 define Device/kn
   DTS := kn
   BLOCKSIZE := 64k
-  IMAGE_SIZE := $(ralink_default_fw_size_4M)
+  IMAGE_SIZE := 7872k
   DEVICE_TITLE := ZyXEL Keenetic
   DEVICE_PACKAGES := kmod-usb-core kmod-usb2 kmod-usb-ehci kmod-usb-ledtrig-usbport
   DEFAULT := n