diff --git a/libraries/Currency/CHANGELOG.md b/libraries/Currency/CHANGELOG.md
index c1569ff7..f48990bb 100644
--- a/libraries/Currency/CHANGELOG.md
+++ b/libraries/Currency/CHANGELOG.md
@@ -6,11 +6,14 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [0.1.8] - 2023-10-19
+- update readme.md
+
+
 ## [0.1.7] - 2022-10-30
 - add changelog.md
 - add rp2040 to build-CI
 
-
 ## [0.1.6] - 2022-04-15
 - fix #5 split .h in .h and .cpp
 
diff --git a/libraries/Currency/README.md b/libraries/Currency/README.md
index f2e4d546..b6f499ac 100644
--- a/libraries/Currency/README.md
+++ b/libraries/Currency/README.md
@@ -1,21 +1,23 @@
 
 [![Arduino CI](https://github.com/RobTillaart/currency/workflows/Arduino%20CI/badge.svg)](https://github.com/marketplace/actions/arduino_ci)
-[![Arduino-lint](https://github.com/RobTillaart/Currency/actions/workflows/arduino-lint.yml/badge.svg)](https://github.com/RobTillaart/Currency/actions/workflows/arduino-lint.yml)
-[![JSON check](https://github.com/RobTillaart/Currency/actions/workflows/jsoncheck.yml/badge.svg)](https://github.com/RobTillaart/Currency/actions/workflows/jsoncheck.yml)
+[![Arduino-lint](https://github.com/RobTillaart/currency/actions/workflows/arduino-lint.yml/badge.svg)](https://github.com/RobTillaart/currency/actions/workflows/arduino-lint.yml)
+[![JSON check](https://github.com/RobTillaart/currency/actions/workflows/jsoncheck.yml/badge.svg)](https://github.com/RobTillaart/currency/actions/workflows/jsoncheck.yml)
+[![GitHub issues](https://img.shields.io/github/issues/RobTillaart/currency.svg)](https://github.com/RobTillaart/currency/issues)
+
 [![License: MIT](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/RobTillaart/currency/blob/master/LICENSE)
 [![GitHub release](https://img.shields.io/github/release/RobTillaart/currency.svg?maxAge=3600)](https://github.com/RobTillaart/currency/releases)
+[![PlatformIO Registry](https://badges.registry.platformio.org/packages/robtillaart/library/currency.svg)](https://registry.platformio.org/libraries/robtillaart/currency)
 
 
 # Currency
 
 Arduino library to help formatting integers for printing as currency.
 
-#### Warning: experimental
-
-
 
 ## Description
 
+**Experimental**
+
 The currency library contains a number of functions that help to print 
 integers as currency.
 
@@ -37,10 +39,17 @@ There is a relation with the printHelpers class - https://github.com/RobTillaart
 When this currency library has matured it might be merged with printHelpers.
 
 
+#### Related
+
+- https://github.com/RobTillaart/printHelpers
+
 ## Interface
 
-The following functions are implemented:
+```cpp
+#include "currency.h"
+```
 
+The following functions are implemented:
 
 ### Core function
 
@@ -98,18 +107,31 @@ individual digits (div / mod 10).
 
 ## Future
 
-#### must
+#### Must
+
 - update documentation.
 
-#### should
+#### Should
+
+#### Could
 
-#### could
 - More wrapper functions?
 - test double parameters.
   - should decimals be a parameter too?
 - add BTC, USD, EUR, GBP, RUB, JPY, CNY, etc. (3+1 chars)
 - https://www.easymarkets.com/eu/learn-centre/discover-trading/currency-acronyms-and-abbreviations/
 
-#### won't
+#### Won't
+
 - currency conversion?
   - intern all in ???
+
+
+## Support
+
+If you appreciate my libraries, you can support the development and maintenance.
+Improve the quality of the libraries by providing issues and Pull Requests, or
+donate through PayPal or GitHub sponsors.
+
+Thank you,
+
diff --git a/libraries/Currency/currency.cpp b/libraries/Currency/currency.cpp
index aa5f3f49..4a7aa7f0 100644
--- a/libraries/Currency/currency.cpp
+++ b/libraries/Currency/currency.cpp
@@ -1,11 +1,9 @@
 //
 //    FILE: currency.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.7
+// VERSION: 0.1.8
 // PURPOSE: Currency library for Arduino
 //     URL: https://github.com/RobTillaart/Currency
-//
-//  HISTORY: see changelog.md
 
 
 #include "currency.h"
@@ -20,11 +18,11 @@ char * currency(int32_t value, int decimals, char decimalSeparator, char thousan
   bool negative = v < 0;
   if (negative) v = -v;
 
-  int pos = -decimals; // decimal places
+  int pos = -decimals;  //  decimal places
 
   while ((pos < 1) || (v > 0))
   {
-    // separators
+    //  separators
     if ((pos == 0) && (decimals > 0) ) tmp[index++] = decimalSeparator;
     if ((pos > 0)  && (pos % 3 == 0) ) tmp[index++] = thousandSeparator;
     pos++;
@@ -37,7 +35,7 @@ char * currency(int32_t value, int decimals, char decimalSeparator, char thousan
   tmp[index++] = symbol;
   tmp[index]   = '\0';
 
-  // reverse string
+  //  reverse string
   for (uint8_t i = 0, j = index - 1; i < index / 2; i++, j--)
   {
     char c = tmp[i];
@@ -57,7 +55,7 @@ char * currency64(int64_t value, int decimals, char decimalSeparator, char thous
   bool negative = v < 0;
   if (negative) v = -v;
 
-  int pos = -decimals; // decimal places
+  int pos = -decimals;  //  decimal places
 
   while ((pos < 1) || (v > 0))
   {
@@ -74,7 +72,7 @@ char * currency64(int64_t value, int decimals, char decimalSeparator, char thous
   tmp[index++] = symbol;
   tmp[index]   = '\0';
 
-  // reverse string
+  //  reverse string
   for (uint8_t i = 0, j = index - 1; i < index / 2; i++, j--)
   {
     char c = tmp[i];
@@ -113,4 +111,4 @@ char * yenf(double value)       { return currency64(round(value * 100), 2,  '.',
 char * yuanf(double value)      { return currency64(round(value * 100), 2,  '.',  ',',  'R'); }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/libraries/Currency/currency.h b/libraries/Currency/currency.h
index 6844f394..968b89b8 100644
--- a/libraries/Currency/currency.h
+++ b/libraries/Currency/currency.h
@@ -1,9 +1,8 @@
 #pragma once
-
 //
 //    FILE: currency.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.1.7
+// VERSION: 0.1.8
 // PURPOSE: Currency library for Arduino
 //     URL: https://github.com/RobTillaart/Currency
 
@@ -11,7 +10,7 @@
 #include "Arduino.h"
 
 
-#define CURRENCY_VERSION                        (F("0.1.7"))
+#define CURRENCY_VERSION                        (F("0.1.8"))
 
 
 //  TODO 
@@ -55,5 +54,5 @@ char * yenf(double value);
 char * yuanf(double value);
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
 
diff --git a/libraries/Currency/library.json b/libraries/Currency/library.json
index 40c77505..0a2dd2e3 100644
--- a/libraries/Currency/library.json
+++ b/libraries/Currency/library.json
@@ -15,9 +15,9 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/currency"
   },
-  "version": "0.1.7",
+  "version": "0.1.8",
   "license": "MIT",
-  "frameworks": "arduino",
+  "frameworks": "*",
   "platforms": "*",
   "headers": "currency.h"
 }
diff --git a/libraries/Currency/library.properties b/libraries/Currency/library.properties
index bcb7eabf..cc79e608 100644
--- a/libraries/Currency/library.properties
+++ b/libraries/Currency/library.properties
@@ -1,5 +1,5 @@
 name=currency
-version=0.1.7
+version=0.1.8
 author=Rob Tillaart <rob.tillaart@gmail.com>
 maintainer=Rob Tillaart <rob.tillaart@gmail.com>
 sentence=Arduino library to help formatting integers as currency e.g. $ 1.000.000,00.