diff --git a/cubemx/Core/Src/spi.c b/cubemx/Core/Src/spi.c
index af3b4e8..8845976 100644
--- a/cubemx/Core/Src/spi.c
+++ b/cubemx/Core/Src/spi.c
@@ -82,7 +82,7 @@ void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
     GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;
     GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
     GPIO_InitStruct.Pull = GPIO_NOPULL;
-    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
+    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM;
     GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
     HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
diff --git a/cubemx/voc-sensor.ioc b/cubemx/voc-sensor.ioc
index f87477d..d1c2a82 100644
--- a/cubemx/voc-sensor.ioc
+++ b/cubemx/voc-sensor.ioc
@@ -93,10 +93,16 @@ PB11.Signal=GPIO_Output
 PB12.GPIOParameters=GPIO_Label
 PB12.GPIO_Label=DisplayCS
 PB12.Signal=GPIO_Output
+PB13.GPIOParameters=GPIO_Speed
+PB13.GPIO_Speed=GPIO_SPEED_FREQ_MEDIUM
 PB13.Mode=Full_Duplex_Master
 PB13.Signal=SPI2_SCK
+PB14.GPIOParameters=GPIO_Speed
+PB14.GPIO_Speed=GPIO_SPEED_FREQ_MEDIUM
 PB14.Mode=Full_Duplex_Master
 PB14.Signal=SPI2_MISO
+PB15.GPIOParameters=GPIO_Speed
+PB15.GPIO_Speed=GPIO_SPEED_FREQ_MEDIUM
 PB15.Mode=Full_Duplex_Master
 PB15.Signal=SPI2_MOSI
 PinOutPanel.RotationAngle=0