diff --git a/keyboard/kwark/FLASH.bin b/keyboard/kwark/FLASH.bin
index a0607b15..b9b272c9 100644
Binary files a/keyboard/kwark/FLASH.bin and b/keyboard/kwark/FLASH.bin differ
diff --git a/keyboard/kwark/kwark.bin b/keyboard/kwark/kwark.bin
index a0607b15..b9b272c9 100644
Binary files a/keyboard/kwark/kwark.bin and b/keyboard/kwark/kwark.bin differ
diff --git a/keyboard/kwark/led.c b/keyboard/kwark/led.c
index 58ef4eb5..4de282d5 100644
--- a/keyboard/kwark/led.c
+++ b/keyboard/kwark/led.c
@@ -22,5 +22,17 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 void led_set(uint8_t usb_led)
 {
-
-}
+    if (usb_led & (1<<USB_LED_CAPS_LOCK)) {
+        // output low
+        DDRB |= (1<<0);
+        PORTB &= ~(1<<0);
+        DDRD |= (1<<5);
+        PORTD &= ~(1<<5);
+    } else {
+        // Hi-Z
+        DDRB &= ~(1<<0);
+        PORTB &= ~(1<<0);
+        DDRD &= ~(1<<5);
+        PORTD &= ~(1<<5);
+    }
+}
\ No newline at end of file