diff --git a/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_GCC/Boot/main.c b/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_GCC/Boot/main.c
index e0b47574..5b18136f 100644
--- a/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_GCC/Boot/main.c
+++ b/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_GCC/Boot/main.c
@@ -178,11 +178,11 @@ void HAL_MspInit(void)
   /* UART TX and RX GPIO pin configuration. */
   GPIO_InitStruct.Pin = LL_GPIO_PIN_2;
   GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
-  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
+  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
   GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
   LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
   GPIO_InitStruct.Pin = LL_GPIO_PIN_3;
-  GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
+  GPIO_InitStruct.Mode = LL_GPIO_MODE_FLOATING;
   LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 #endif
 } /*** end of HAL_MspInit ***/
diff --git a/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_IAR/Boot/main.c b/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_IAR/Boot/main.c
index 9406f166..433c509a 100644
--- a/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_IAR/Boot/main.c
+++ b/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_IAR/Boot/main.c
@@ -175,11 +175,11 @@ void HAL_MspInit(void)
   /* UART TX and RX GPIO pin configuration. */
   GPIO_InitStruct.Pin = LL_GPIO_PIN_2;
   GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
-  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
+  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
   GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
   LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
   GPIO_InitStruct.Pin = LL_GPIO_PIN_3;
-  GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
+  GPIO_InitStruct.Mode = LL_GPIO_MODE_FLOATING;
   LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 #endif
 } /*** end of HAL_MspInit ***/
diff --git a/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_TrueStudio/Boot/main.c b/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_TrueStudio/Boot/main.c
index 1bbaff4a..106a79c5 100644
--- a/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_TrueStudio/Boot/main.c
+++ b/Target/Demo/ARMCM3_STM32F1_Nucleo_F103RB_TrueStudio/Boot/main.c
@@ -178,11 +178,11 @@ void HAL_MspInit(void)
   /* UART TX and RX GPIO pin configuration. */
   GPIO_InitStruct.Pin = LL_GPIO_PIN_2;
   GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
-  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
+  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
   GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
   LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
   GPIO_InitStruct.Pin = LL_GPIO_PIN_3;
-  GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
+  GPIO_InitStruct.Mode = LL_GPIO_MODE_FLOATING;
   LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
 #endif
 } /*** end of HAL_MspInit ***/