diff --git a/libraries/DAC8554/CHANGELOG.md b/libraries/DAC8554/CHANGELOG.md
index 466dd895..b643f0a9 100644
--- a/libraries/DAC8554/CHANGELOG.md
+++ b/libraries/DAC8554/CHANGELOG.md
@@ -6,6 +6,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [0.4.1] - 2024-05-23
+- improve support for ARDUINO_ARCH_MBED
+
 ## [0.4.0] - 2024-01-20
 - Fix #15, improve handling SPI dependency.
 - update examples
diff --git a/libraries/DAC8554/DAC8554.cpp b/libraries/DAC8554/DAC8554.cpp
index cb7709fc..94b107fa 100644
--- a/libraries/DAC8554/DAC8554.cpp
+++ b/libraries/DAC8554/DAC8554.cpp
@@ -2,7 +2,7 @@
 //    FILE: DAC8554.cpp
 //  AUTHOR: Rob Tillaart
 // PURPOSE: Arduino library for DAC8554 SPI Digital Analog Convertor
-// VERSION: 0.4.0
+// VERSION: 0.4.1
 //    DATE: 2017-12-19
 //     URL: https://github.com/RobTillaart/DAC8554
 
@@ -126,7 +126,7 @@ void DAC8554::setSingleValue(uint8_t channel, uint16_t value)
 void DAC8554::bufferPowerDown(uint8_t channel, uint8_t powerDownMode)
 {
   _register[channel] = powerDownMode;
-  
+
   uint8_t configRegister = _address;
   configRegister |= DAC8554_BUFFER_WRITE;
   configRegister |= (channel << 1);
@@ -150,7 +150,7 @@ void DAC8554::setPowerDown(uint8_t channel, uint8_t powerDownMode)
 void DAC8554::setSinglePowerDown(uint8_t channel, uint8_t powerDownMode)
 {
   _register[channel] = powerDownMode;
-  
+
   uint8_t configRegister = _address;
   configRegister |= DAC8554_SINGLE_WRITE;
   configRegister |= (channel << 1);
diff --git a/libraries/DAC8554/DAC8554.h b/libraries/DAC8554/DAC8554.h
index 9a0233f0..c9c5f8d1 100644
--- a/libraries/DAC8554/DAC8554.h
+++ b/libraries/DAC8554/DAC8554.h
@@ -2,8 +2,8 @@
 //
 //    FILE: DAC8554.h
 //  AUTHOR: Rob Tillaart
-// PURPOSE: Arduino library for DAC8554 SPI Digital Analog Convertor  
-// VERSION: 0.4.0
+// PURPOSE: Arduino library for DAC8554 SPI Digital Analog Convertor
+// VERSION: 0.4.1
 //    DATE: 2017-12-19
 //     URL: https://github.com/RobTillaart/DAC8554
 //
@@ -11,7 +11,7 @@
 #include "Arduino.h"
 #include "SPI.h"
 
-#define DAC8554_LIB_VERSION                       (F("0.4.0"))
+#define DAC8554_LIB_VERSION                       (F("0.4.1"))
 
 #define DAC8554_POWERDOWN_NORMAL                  0x00
 #define DAC8554_POWERDOWN_1K                      0x40
@@ -20,7 +20,10 @@
 
 
 #ifndef __SPI_CLASS__
-  #if defined(ARDUINO_ARCH_RP2040)
+  //  MBED must be tested before RP2040
+  #if defined(ARDUINO_ARCH_MBED)
+  #define __SPI_CLASS__   SPIClass
+  #elif defined(ARDUINO_ARCH_RP2040)
   #define __SPI_CLASS__   SPIClassRP2040
   #else
   #define __SPI_CLASS__   SPIClass
diff --git a/libraries/DAC8554/README.md b/libraries/DAC8554/README.md
index 30ddc9fb..107bd3bb 100644
--- a/libraries/DAC8554/README.md
+++ b/libraries/DAC8554/README.md
@@ -18,7 +18,7 @@ Arduino library for DAC8554 SPI Digital Analog Convertor.
 
 The DAC8554 is a SPI based 16 bit DAC with four channels.
 
-**Warning** This library is not tested extensively
+**Warning** This library is not tested extensively.
 
 
 #### 0.4.0 Breaking change
@@ -129,7 +129,6 @@ See examples
 - improve documentation
 - testing with hardware
 
-
 #### Should
 
 #### Could
diff --git a/libraries/DAC8554/keywords.txt b/libraries/DAC8554/keywords.txt
index df657ff2..bde0cde5 100644
--- a/libraries/DAC8554/keywords.txt
+++ b/libraries/DAC8554/keywords.txt
@@ -10,20 +10,19 @@ begin	KEYWORD2
 bufferValue	KEYWORD2
 setValue	KEYWORD2
 getValue	KEYWORD2
-
 setSingleValue	KEYWORD2
+
 bufferPowerDown	KEYWORD2
 setPowerDown	KEYWORD2
 getPowerDownMode	KEYWORD2
-
 setSinglePowerDown	KEYWORD2
+
 broadcastBuffer	KEYWORD2
 broadcastValue	KEYWORD2
 broadcastPowerDown	KEYWORD2
 
 setSPIspeed	KEYWORD2
 getSPIspeed	KEYWORD2
-
 usesHWSPI	KEYWORD2
 
 
diff --git a/libraries/DAC8554/library.json b/libraries/DAC8554/library.json
index 775504fc..19d18973 100644
--- a/libraries/DAC8554/library.json
+++ b/libraries/DAC8554/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/DAC8554"
   },
-  "version": "0.4.0",
+  "version": "0.4.1",
   "license": "MIT",
   "frameworks": "*",
   "platforms": "*",
diff --git a/libraries/DAC8554/library.properties b/libraries/DAC8554/library.properties
index 7eb4c1bc..6368b4e1 100644
--- a/libraries/DAC8554/library.properties
+++ b/libraries/DAC8554/library.properties
@@ -1,5 +1,5 @@
 name=DAC8554
-version=0.4.0
+version=0.4.1
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for DAC8534 and DAC8554 SPI Digital Analog Convertor.