diff --git a/fw/Core/Src/main.c b/fw/Core/Src/main.c
index 7732ab1..8b07a78 100644
--- a/fw/Core/Src/main.c
+++ b/fw/Core/Src/main.c
@@ -337,8 +337,10 @@ int main(void)
 	  }
 	  /* if config changed (MODBUS write), reflect changes to EEPROM */
 	  if (sensor_config_pending_write) {
+		  uart_disable_interrupts();
 		  config_write(&sensor_config);
 		  sensor_config_pending_write = 0;
+		  uart_enable_interrupts();
 	  }
 	  if (modbus_address_changed)
 	  {