diff --git a/Makefile b/Makefile
index 1f077f7..53fa546 100644
--- a/Makefile
+++ b/Makefile
@@ -78,7 +78,7 @@ DRIVER_PATH = Drivers/STM32F0xx_HAL_Driver
 INCLUDES = -I$(CMSIS_PATH)/Include
 INCLUDES += -I$(CMSIS_DEVICE_PATH)/Include
 INCLUDES += -I$(DRIVER_PATH)/Inc
-INCLUDES += -IInc
+INCLUDES += -Iinc
 INCLUDES += $(USB_INCLUDES)
 INCLUDES += $(USER_INCLUDES)
 
@@ -166,10 +166,10 @@ $(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) $(USB_OBJECTS) $(CUBELIB)
 		-Map=$(BUILD_DIR)/$(TARGET).map
 	$(SIZE) $@
 
-$(BUILD_DIR)/%.o: Src/%.c | $(BUILD_DIR)
+$(BUILD_DIR)/%.o: src/%.c | $(BUILD_DIR)
 	$(CC) $(CFLAGS) -Os -c -o $@ $^
 
-$(BUILD_DIR)/%.o: Src/%.s | $(BUILD_DIR)
+$(BUILD_DIR)/%.o: src/%.s | $(BUILD_DIR)
 	$(CC) $(CFLAGS) -c -o $@ $^
 
 $(BUILD_DIR):
diff --git a/Inc/can.h b/inc/can.h
similarity index 100%
rename from Inc/can.h
rename to inc/can.h
diff --git a/Inc/interrupts.h b/inc/interrupts.h
similarity index 100%
rename from Inc/interrupts.h
rename to inc/interrupts.h
diff --git a/Inc/led.h b/inc/led.h
similarity index 100%
rename from Inc/led.h
rename to inc/led.h
diff --git a/Inc/slcan.h b/inc/slcan.h
similarity index 62%
rename from Inc/slcan.h
rename to inc/slcan.h
index 5066824..c3195bc 100644
--- a/Inc/slcan.h
+++ b/inc/slcan.h
@@ -4,8 +4,8 @@
 int8_t slcan_parse_frame(uint8_t *buf, CanRxMsgTypeDef *frame);
 int8_t slcan_parse_str(uint8_t *buf, uint8_t len);
 
-/* maximum rx buffer len: extended CAN frame with timestamp */
-#define SLCAN_MTU 30// (sizeof("T1111222281122334455667788EA5F\r")+1)
+// maximum rx buffer len: extended CAN frame with timestamp 
+#define SLCAN_MTU 30 // (sizeof("T1111222281122334455667788EA5F\r")+1)
 
 #define SLCAN_STD_ID_LEN 3
 #define SLCAN_EXT_ID_LEN 8
diff --git a/Inc/stm32f0xx_hal_conf.h b/inc/stm32f0xx_hal_conf.h
similarity index 100%
rename from Inc/stm32f0xx_hal_conf.h
rename to inc/stm32f0xx_hal_conf.h
diff --git a/Inc/system.h b/inc/system.h
similarity index 100%
rename from Inc/system.h
rename to inc/system.h
diff --git a/Inc/usb_device.h b/inc/usb_device.h
similarity index 100%
rename from Inc/usb_device.h
rename to inc/usb_device.h
diff --git a/Inc/usbd_cdc_if.h b/inc/usbd_cdc_if.h
similarity index 100%
rename from Inc/usbd_cdc_if.h
rename to inc/usbd_cdc_if.h
diff --git a/Inc/usbd_conf.h b/inc/usbd_conf.h
similarity index 100%
rename from Inc/usbd_conf.h
rename to inc/usbd_conf.h
diff --git a/Inc/usbd_desc.h b/inc/usbd_desc.h
similarity index 100%
rename from Inc/usbd_desc.h
rename to inc/usbd_desc.h
diff --git a/Src/can.c b/src/can.c
similarity index 100%
rename from Src/can.c
rename to src/can.c
diff --git a/Src/interrupts.c b/src/interrupts.c
similarity index 100%
rename from Src/interrupts.c
rename to src/interrupts.c
diff --git a/Src/led.c b/src/led.c
similarity index 100%
rename from Src/led.c
rename to src/led.c
diff --git a/Src/main.c b/src/main.c
similarity index 100%
rename from Src/main.c
rename to src/main.c
diff --git a/Src/slcan.c b/src/slcan.c
similarity index 100%
rename from Src/slcan.c
rename to src/slcan.c
diff --git a/Src/startup_stm32f042x6.s b/src/startup_stm32f042x6.s
similarity index 100%
rename from Src/startup_stm32f042x6.s
rename to src/startup_stm32f042x6.s
diff --git a/Src/system.c b/src/system.c
similarity index 100%
rename from Src/system.c
rename to src/system.c
diff --git a/Src/system_stm32f0xx.c b/src/system_stm32f0xx.c
similarity index 100%
rename from Src/system_stm32f0xx.c
rename to src/system_stm32f0xx.c
diff --git a/Src/usb_device.c b/src/usb_device.c
similarity index 100%
rename from Src/usb_device.c
rename to src/usb_device.c
diff --git a/Src/usbd_cdc_if.c b/src/usbd_cdc_if.c
similarity index 100%
rename from Src/usbd_cdc_if.c
rename to src/usbd_cdc_if.c
diff --git a/Src/usbd_conf.c b/src/usbd_conf.c
similarity index 100%
rename from Src/usbd_conf.c
rename to src/usbd_conf.c
diff --git a/Src/usbd_desc.c b/src/usbd_desc.c
similarity index 100%
rename from Src/usbd_desc.c
rename to src/usbd_desc.c