diff --git a/lib/led_ws2812b.c b/lib/led_ws2812b.c
index 25bf2ac..7615437 100644
--- a/lib/led_ws2812b.c
+++ b/lib/led_ws2812b.c
@@ -38,6 +38,9 @@
 /** @defgroup led_ws2812b_spi SPI peripheral used to control the WS2812B LEDs
  *  @{
  */
+/** SPI peripheral
+ *  @note SPI2 is 5V tolerant and can be operated in open-drain mode will 1 kO pull-up resistor to 5V to get 5V signal level
+ */
 #define LED_WS2812B_SPI 2 /**< SPI peripheral */
 /** @} */
 
@@ -105,7 +108,7 @@ void led_ws2812b_setup(void)
 
 	// setup SPI to transmit data
 	rcc_periph_clock_enable(RCC_SPI_MOSI_PORT(LED_WS2812B_SPI)); // enable clock for SPI output peripheral
-	gpio_set_mode(SPI_MOSI_PORT(LED_WS2812B_SPI), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, SPI_MOSI_PIN(LED_WS2812B_SPI)); // set MISO as output (needs to be shifted to 5V)
+	gpio_set_mode(SPI_MOSI_PORT(LED_WS2812B_SPI), GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, SPI_MOSI_PIN(LED_WS2812B_SPI)); // set MOSI as output (push-pull needs to be shifted to 5V, open-drain consumes up to 5 mA with pull-up resistor of 1 kO)
 	rcc_periph_clock_enable(RCC_AFIO); // enable clock for SPI alternate function
 	rcc_periph_clock_enable(RCC_SPI(LED_WS2812B_SPI)); // enable clock for SPI peripheral
 	spi_reset(SPI(LED_WS2812B_SPI)); // clear SPI values to default