diff --git a/manifests/smlight/slzb06Mg24_bootloader.yaml b/manifests/smlight/slzb06Mg24_bootloader.yaml
index 548085d3..8c00a65f 100644
--- a/manifests/smlight/slzb06Mg24_bootloader.yaml
+++ b/manifests/smlight/slzb06Mg24_bootloader.yaml
@@ -17,10 +17,10 @@ c_defines:
   SL_SERIAL_UART_PERIPHERAL_NO: 0
 
   SL_SERIAL_UART_TX_PORT: gpioPortA
-  SL_SERIAL_UART_TX_PIN:  6
+  SL_SERIAL_UART_TX_PIN:  5
 
   SL_SERIAL_UART_RX_PORT: gpioPortA
-  SL_SERIAL_UART_RX_PIN:  5
+  SL_SERIAL_UART_RX_PIN:  6
 
   SL_SERIAL_UART_CTS_PORT: 0
   SL_SERIAL_UART_CTS_PIN:  0
diff --git a/manifests/smlight/slzb06Mg24_zigbee_ncp.yaml b/manifests/smlight/slzb06Mg24_zigbee_ncp.yaml
index d56c1ac4..145a1cec 100644
--- a/manifests/smlight/slzb06Mg24_zigbee_ncp.yaml
+++ b/manifests/smlight/slzb06Mg24_zigbee_ncp.yaml
@@ -35,10 +35,10 @@ c_defines:
   SL_IOSTREAM_USART_VCOM_PERIPHERAL_NO: 0
 
   SL_IOSTREAM_USART_VCOM_TX_PORT: gpioPortA
-  SL_IOSTREAM_USART_VCOM_TX_PIN:  6
+  SL_IOSTREAM_USART_VCOM_TX_PIN:  5
 
   SL_IOSTREAM_USART_VCOM_RX_PORT: gpioPortA
-  SL_IOSTREAM_USART_VCOM_RX_PIN:  5
+  SL_IOSTREAM_USART_VCOM_RX_PIN:  6
 
   SL_IOSTREAM_USART_VCOM_CTS_PORT: 0
   SL_IOSTREAM_USART_VCOM_CTS_PIN:  0