diff --git a/lib/led_ws2812b.c b/lib/led_ws2812b.c
index 4d17849..7d08781 100644
--- a/lib/led_ws2812b.c
+++ b/lib/led_ws2812b.c
@@ -17,7 +17,6 @@
  *  @author King Kévin <kingkevin@cuvoodoo.info>
  *  @date 2016
  *  @note peripherals used: SPI @ref led_ws2812b_spi, timer @ref led_ws2812b_timer, DMA @ref led_ws2812b_dma
- *  @todo improve ws2812b_set_rgb speed
  */
 
 /* standard libraries */
diff --git a/lib/rtc_ds1307.c b/lib/rtc_ds1307.c
index 6684c24..e4bc6b7 100644
--- a/lib/rtc_ds1307.c
+++ b/lib/rtc_ds1307.c
@@ -16,6 +16,7 @@
  *  @file rtc_ds1307.c
  *  @author King Kévin <kingkevin@cuvoodoo.info>
  *  @date 2016
+ *  @note user RAM is not handled 
  *  @note peripherals used: I2C @ref rtc_ds1307_i2c, GPIO @ref rtc_ds1307_square_wave
  */
 
diff --git a/lib/rtc_ds1307.h b/lib/rtc_ds1307.h
index 773fc64..02dff6a 100644
--- a/lib/rtc_ds1307.h
+++ b/lib/rtc_ds1307.h
@@ -16,7 +16,7 @@
  *  @file rtc_ds1307.h
  *  @author King Kévin <kingkevin@cuvoodoo.info>
  *  @date 2016
- *  @todo user RAM is not handled
+ *  @note user RAM is not handled
  *  @note peripherals used: I2C @ref rtc_ds1307_i2c, GPIO @ref rtc_ds1307_square_wave
  */
 #pragma once
diff --git a/lib/usart.c b/lib/usart.c
index ce3adae..18e0679 100644
--- a/lib/usart.c
+++ b/lib/usart.c
@@ -17,7 +17,6 @@
  *  @author King Kévin <kingkevin@cuvoodoo.info>
  *  @date 2016
  *  @note peripherals used: USART @ref usart
- *  @todo fix ring buffer racing (interrupt vs software)
  */
 
 /* standard libraries */