diff --git a/keyboards/ymdk/ymd09/config.h b/keyboards/ymdk/ymd09/config.h
index 372046b8bc..8b34a98363 100644
--- a/keyboards/ymdk/ymd09/config.h
+++ b/keyboards/ymdk/ymd09/config.h
@@ -20,8 +20,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "config_common.h"
 
 /* USB Device descriptor parameter */
-#define VENDOR_ID 0xFEED
-#define PRODUCT_ID 0x0909
+#define VENDOR_ID 0x594D // "YM"
+#define PRODUCT_ID 0x4409 // "D" + 09
 #define DEVICE_VER 0x0001
 #define MANUFACTURER YMDK
 #define PRODUCT YMD09
diff --git a/keyboards/ymdk/ymd09/keymaps/via/keymap.c b/keyboards/ymdk/ymd09/keymaps/via/keymap.c
new file mode 100644
index 0000000000..e84b587a36
--- /dev/null
+++ b/keyboards/ymdk/ymd09/keymaps/via/keymap.c
@@ -0,0 +1,20 @@
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [0] = LAYOUT(KC_KP_7, KC_KP_8, KC_KP_9,
+               KC_KP_4, LT(1, KC_KP_5), KC_KP_6,
+               KC_KP_1, KC_KP_2, KC_KP_3),
+
+  [1] = LAYOUT(RGB_RMOD, RGB_VAI, RGB_MOD,
+               RGB_HUI, RESET, RGB_SAI,
+               RGB_HUD, RGB_VAD, RGB_SAD),
+
+  [2] = LAYOUT(KC_TRNS, KC_TRNS, KC_TRNS,
+               KC_TRNS, KC_TRNS, KC_TRNS,
+               KC_TRNS, KC_TRNS, KC_TRNS),
+
+  [3] = LAYOUT(KC_TRNS, KC_TRNS, KC_TRNS,
+               KC_TRNS, KC_TRNS, KC_TRNS,
+               KC_TRNS, KC_TRNS, KC_TRNS),
+};
diff --git a/keyboards/ymdk/ymd09/keymaps/via/rules.mk b/keyboards/ymdk/ymd09/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/ymdk/ymd09/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/ymdk/ymd09/rules.mk b/keyboards/ymdk/ymd09/rules.mk
index 171e9b1fcb..be1811366e 100644
--- a/keyboards/ymdk/ymd09/rules.mk
+++ b/keyboards/ymdk/ymd09/rules.mk
@@ -30,3 +30,4 @@ BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no           # Audio output on port C6
 FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
 HD44780_ENABLE = no         # Enable support for HD44780 based LCDs
+LTO_ENABLE = yes            # reduce firmware size