diff --git a/stm32f103c8t6-bootloader/build_number.txt b/stm32f103c8t6-bootloader/build_number.txt
index 246662b..ce9cd49 100644
--- a/stm32f103c8t6-bootloader/build_number.txt
+++ b/stm32f103c8t6-bootloader/build_number.txt
@@ -1 +1 @@
-436
+437
diff --git a/stm32f103c8t6-bootloader/src/pinning.h b/stm32f103c8t6-bootloader/src/pinning.h
index a5ceec1..441d9b3 100644
--- a/stm32f103c8t6-bootloader/src/pinning.h
+++ b/stm32f103c8t6-bootloader/src/pinning.h
@@ -1,15 +1,6 @@
 #pragma once
 
 // Port A
-#define PIN_LIGHT_SENSOR        1   // PA1
 #define PIN_TEST_POINT          8   // PA8
-#define PIN_UART_TX             9   // PA9  - USART1_TX
-#define PIN_UART_RX             10  // PA10 - USART1_RX
 #define PIN_USB_DM              11  // PA11 - USB_DM
 #define PIN_USB_DP              12  // PA12 - USB_DP
-
-// Port B
-#define PIN_LED                 0   // PB0  - Status LED
-#define PIN_SELECT              4   // PB4  - Bus select line
-#define PIN_SCL                 6   // PB6  - I2C1_SCL
-#define PIN_SDA                 7   // PB7  - I2C1_SDA