diff --git a/libraries/Par27979/LICENSE b/libraries/Par27979/LICENSE
index 240dc45f..69275c90 100644
--- a/libraries/Par27979/LICENSE
+++ b/libraries/Par27979/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2010-2021 Rob Tillaart
+Copyright (c) 2010-2022 Rob Tillaart
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/libraries/Par27979/Par27979.h b/libraries/Par27979/Par27979.h
index 6f0e01de..76c02dc7 100644
--- a/libraries/Par27979/Par27979.h
+++ b/libraries/Par27979/Par27979.h
@@ -2,7 +2,7 @@
 //
 //    FILE: PAR27979.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.2.2
+// VERSION: 0.2.3
 // PURPOSE: Arduino library for Parallax 27979 _serial LCD display
 //     URL: https://github.com/RobTillaart/PAR27979
 //
@@ -11,13 +11,14 @@
 //  0.2.0   2020-06-23  complete redo as class
 //                      also support for 27976, 27977 (not tested)
 //  0.2.1   2021-01-03  Arduino-CI + unit test
-//  0.2.2   2021-11-10  Update Arduino-CI, 
-//                      update readme.md + badges, 
+//  0.2.2   2021-11-10  Update Arduino-CI,
+//                      update readme.md + badges,
 //                      fix version number
 //                      update Print interface
+//  0.2.3   2021-12-22  update library.json, license, minor edits
 
 
-#define PAR27929_LIB_VERSION      (F("0.2.2"))
+#define PAR27929_LIB_VERSION      (F("0.2.3"))
 
 #include "Arduino.h"
 
@@ -69,9 +70,9 @@ public:
 
   // PRINT interface
   size_t write(const uint8_t data) { return _ser->write(data); };
-  size_t write(const uint8_t * data, uint8_t length) 
+  size_t write(const uint8_t * data, uint8_t length)
   {
-    return _ser->write(data, length); 
+    return _ser->write(data, length);
   };
 
 
@@ -79,4 +80,6 @@ private:
   Stream *_ser;
 };
 
+
 // -- END OF FILE --
+
diff --git a/libraries/Par27979/examples/PAR27979_demo/PAR27979_demo.ino b/libraries/Par27979/examples/PAR27979_demo/PAR27979_demo.ino
index 463c4ab8..92b7e1a7 100644
--- a/libraries/Par27979/examples/PAR27979_demo/PAR27979_demo.ino
+++ b/libraries/Par27979/examples/PAR27979_demo/PAR27979_demo.ino
@@ -1,11 +1,10 @@
 //
 //    FILE: par27979_demo.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.0
 // PURPOSE: demo
 //    DATE: 2020-06-23
 //    (c) : MIT
-//
+
 
 #include <SoftwareSerial.h>
 
@@ -80,3 +79,4 @@ void loop()
 
 
 // -- END OF FILE --
+
diff --git a/libraries/Par27979/examples/PAR27979_demo2/PAR27979_demo2.ino b/libraries/Par27979/examples/PAR27979_demo2/PAR27979_demo2.ino
index 26767e6b..6f4d4799 100644
--- a/libraries/Par27979/examples/PAR27979_demo2/PAR27979_demo2.ino
+++ b/libraries/Par27979/examples/PAR27979_demo2/PAR27979_demo2.ino
@@ -1,11 +1,9 @@
 //
 //    FILE: par27979_demo.ino
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.0
 // PURPOSE: demo
 //    DATE: 2020-06-23
 //    (c) : MIT
-//
 
 
 #include "PAR27979.h"
@@ -76,3 +74,4 @@ void loop()
 
 
 // -- END OF FILE --
+
diff --git a/libraries/Par27979/library.json b/libraries/Par27979/library.json
index be4e558d..ed25e527 100644
--- a/libraries/Par27979/library.json
+++ b/libraries/Par27979/library.json
@@ -15,8 +15,9 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/PAR27979.git"
   },
-  "version": "0.2.2",
+  "version": "0.2.3",
   "license": "MIT",
   "frameworks": "arduino",
-  "platforms": "*"
+  "platforms": "*",
+  "headers": "PAR27979.h"
 }
diff --git a/libraries/Par27979/library.properties b/libraries/Par27979/library.properties
index 3b179f82..88e94594 100644
--- a/libraries/Par27979/library.properties
+++ b/libraries/Par27979/library.properties
@@ -1,5 +1,5 @@
 name=PAR27979
-version=0.2.2
+version=0.2.3
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library for Parallax 27979 serial LCD display.
diff --git a/libraries/Par27979/readme.md b/libraries/Par27979/readme.md
index c60b99e0..f888286c 100644
--- a/libraries/Par27979/readme.md
+++ b/libraries/Par27979/readme.md
@@ -17,6 +17,8 @@ The library is essentially a wrapper around a Stream, typically Serial,
 Serial2 (3,4..) or newSoftSerial or equivalent.
 This stream is given as parameter in the constructor.
 
+Should work for 27976 and 27977 display although not tested.
+
 
 ## Interface
 
@@ -57,7 +59,7 @@ see datasheet.
 
 - **void octave(uint8_t octave)**  octave =  3 4 5 6 7
 - **void duration(uint8_t duration)** duration = 1 2 4 8 16 32 64
-- **void play(uint8_t note)** note = 0 1 2 3 4 5 6 7 8 9 10 11   0=A 1=A# etc
+- **void play(uint8_t note)** note = 0 1 2 3 4 5 6 7 8 9 10 11   0=A 1=A# etc.
 - **void noSound()** idem.
 
 
diff --git a/libraries/Par27979/test/unit_test_001.cpp b/libraries/Par27979/test/unit_test_001.cpp
index ba5695b2..18f9f291 100644
--- a/libraries/Par27979/test/unit_test_001.cpp
+++ b/libraries/Par27979/test/unit_test_001.cpp
@@ -37,6 +37,7 @@
 
 unittest_setup()
 {
+  fprintf(stderr, "VERSION: %s\n", (char *) PAR27929_LIB_VERSION);
 }
 
 unittest_teardown()
@@ -49,8 +50,6 @@ unittest_teardown()
 
 unittest(test_constructor)
 {
-  fprintf(stderr, "VERSION: %s\n", (char *) PAR27929_LIB_VERSION);
-
   PAR27979 display(&Serial);
   assertEqual(1, display.write(232));   // no sound