diff --git a/.github/workflows/arduino-lint.yml b/.github/workflows/arduino-lint.yml
index 7f8f4ef..0ad60f4 100644
--- a/.github/workflows/arduino-lint.yml
+++ b/.github/workflows/arduino-lint.yml
@@ -6,8 +6,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v4
-      - uses: arduino/arduino-lint-action@v1
+      - uses: actions/checkout@v5
+      - uses: arduino/arduino-lint-action@v2
         with:
           library-manager: update
           compliance: strict
\ No newline at end of file
diff --git a/.github/workflows/arduino_test_runner.yml b/.github/workflows/arduino_test_runner.yml
index dbd0ce7..1897982 100644
--- a/.github/workflows/arduino_test_runner.yml
+++ b/.github/workflows/arduino_test_runner.yml
@@ -8,7 +8,7 @@ jobs:
     timeout-minutes: 20
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.6
diff --git a/.github/workflows/jsoncheck.yml b/.github/workflows/jsoncheck.yml
index 1cbb5e2..8804e69 100644
--- a/.github/workflows/jsoncheck.yml
+++ b/.github/workflows/jsoncheck.yml
@@ -5,13 +5,15 @@ on:
     paths:
       - '**.json'
   pull_request:
+    paths:
+      - '**.json'
 
 jobs:
   test:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: json-syntax-check
         uses: limitusus/json-syntax-check@v2
         with:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 555b4fe..6d7c9b2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,11 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 
+## [0.4.1] - 2025-10-12
+- update GitHub actions
+- update examples
+- minor edits
+
 ## [0.4.0] - 2024-09-10
 - fix #17, loop unroll option, improving performance, kudos to nt314p
 - added flag to select LOOP UNROLL (is optional as it gives larger code size)
diff --git a/FastShiftIn.cpp b/FastShiftIn.cpp
index 9c9bb84..9300b92 100644
--- a/FastShiftIn.cpp
+++ b/FastShiftIn.cpp
@@ -1,7 +1,7 @@
 //
 //    FILE: FastShiftIn.cpp
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.4.0
+// VERSION: 0.4.1
 // PURPOSE: Fast ShiftIn for 74HC165 register, AVR optimized
 //    DATE: 2013-09-29
 //     URL: https://github.com/RobTillaart/FastShiftIn
diff --git a/FastShiftIn.h b/FastShiftIn.h
index a18f894..44c1d64 100644
--- a/FastShiftIn.h
+++ b/FastShiftIn.h
@@ -2,7 +2,7 @@
 //
 //    FILE: FastShiftIn.h
 //  AUTHOR: Rob Tillaart
-// VERSION: 0.4.0
+// VERSION: 0.4.1
 // PURPOSE: Fast ShiftIn for 74HC165 register, AVR optimized
 //    DATE: 2013-09-29
 //     URL: https://github.com/RobTillaart/FastShiftIn
@@ -11,7 +11,7 @@
 #include "Arduino.h"
 
 
-#define FASTSHIFTIN_LIB_VERSION         (F("0.4.0"))
+#define FASTSHIFTIN_LIB_VERSION         (F("0.4.1"))
 
 //  uncomment next line to get SPEED OPTIMIZED CODE
 //  #define FASTSHIFTIN_AVR_LOOP_UNROLLED    1
diff --git a/LICENSE b/LICENSE
index 9a9ac5a..ea1e69a 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2013-2024 Rob Tillaart
+Copyright (c) 2013-2025 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/README.md b/README.md
index cfc937e..eec16e3 100644
--- a/README.md
+++ b/README.md
@@ -163,6 +163,7 @@ pull up resistors, especially if wires are exceeding 10 cm (4").
 - performance ESP32
 - example schema
 - add invert flag?
+  - value = value ^ 0xFF;
 - would it be interesting to make a fastShiftIn16() etc?
   - squeeze performance but more maintenance.?           
 
diff --git a/examples/fastShiftIn/fastShiftIn.ino b/examples/fastShiftIn/fastShiftIn.ino
index a495c60..0e483cd 100644
--- a/examples/fastShiftIn/fastShiftIn.ino
+++ b/examples/fastShiftIn/fastShiftIn.ino
@@ -15,13 +15,16 @@ volatile int x = 0;
 void setup()
 {
   Serial.begin(115200);
-  Serial.println(__FILE__); 
+  Serial.println();
+  Serial.println(__FILE__);
+  Serial.println("FASTSHIFTIN_LIB_VERSION: ");
   Serial.println(FASTSHIFTIN_LIB_VERSION);
+  Serial.println();
 
   digitalWrite(12, HIGH);
-  Serial.println("\n 8 bits HIGH\n"); 
+  Serial.println("\n 8 bits HIGH\n");
 
-  Serial.println("\nPerformance - time in us"); 
+  Serial.println("\nPerformance - time in us");
   uint32_t start = micros();
   for (int i = 0; i < 1000; i++)
   {
@@ -39,9 +42,9 @@ void setup()
   }
   uint32_t duration2 = micros() - start;
   Serial.print("FastShiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("       Delta: ");
-  Serial.println((duration2 - duration1)* 0.001);
+  Serial.println((duration2 - duration1)* 0.001f);
   Serial.println();
 
 
@@ -52,7 +55,7 @@ void setup()
   }
   duration1 = micros() - start;
   Serial.print("Standard shiftIn1: ");
-  Serial.println(duration1* 0.001);
+  Serial.println(duration1* 0.001f);
 
   start = micros();
   for (int i = 0; i < 1000; i++)
@@ -62,9 +65,9 @@ void setup()
   }
   duration2 = micros() - start;
   Serial.print("Standard shiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("            Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
 
   Serial.println("done...");
@@ -76,5 +79,5 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
 
diff --git a/examples/fastShiftIn_readLSBFIRST/fastShiftIn_readLSBFIRST.ino b/examples/fastShiftIn_readLSBFIRST/fastShiftIn_readLSBFIRST.ino
index 571d949..500acd3 100644
--- a/examples/fastShiftIn_readLSBFIRST/fastShiftIn_readLSBFIRST.ino
+++ b/examples/fastShiftIn_readLSBFIRST/fastShiftIn_readLSBFIRST.ino
@@ -15,8 +15,11 @@ volatile int x = 0;
 void setup()
 {
   Serial.begin(115200);
+  Serial.println();
   Serial.println(__FILE__);
+  Serial.println("FASTSHIFTIN_LIB_VERSION: ");
   Serial.println(FASTSHIFTIN_LIB_VERSION);
+  Serial.println();
 
   digitalWrite(12, HIGH);
   Serial.println("\n 8 bits HIGH - readLSBFIRST\n");
@@ -29,7 +32,7 @@ void setup()
   }
   uint32_t duration1 = micros() - start;
   Serial.print("FastShiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
 
   start = micros();
   for (int i = 0; i < 1000; i++)
@@ -39,9 +42,9 @@ void setup()
   }
   uint32_t duration2 = micros() - start;
   Serial.print("FastShiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("       Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
 
 
@@ -52,7 +55,7 @@ void setup()
   }
   duration1 = micros() - start;
   Serial.print("Standard shiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
 
   start = micros();
   for (int i = 0; i < 1000; i++)
@@ -62,9 +65,9 @@ void setup()
   }
   duration2 = micros() - start;
   Serial.print("Standard shiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("            Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
 
   Serial.println("done...");
@@ -76,4 +79,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/examples/fastShiftIn_readMSBFIRST/fastShiftIn_readMSBFIRST.ino b/examples/fastShiftIn_readMSBFIRST/fastShiftIn_readMSBFIRST.ino
index ce04e3a..b38b318 100644
--- a/examples/fastShiftIn_readMSBFIRST/fastShiftIn_readMSBFIRST.ino
+++ b/examples/fastShiftIn_readMSBFIRST/fastShiftIn_readMSBFIRST.ino
@@ -15,8 +15,11 @@ volatile int x = 0;
 void setup()
 {
   Serial.begin(115200);
-  Serial.print("example fastShiftIn: ");
+  Serial.println();
+  Serial.println(__FILE__);
+  Serial.println("FASTSHIFTIN_LIB_VERSION: ");
   Serial.println(FASTSHIFTIN_LIB_VERSION);
+  Serial.println();
 
   digitalWrite(12, HIGH);
   Serial.println("\n 8 bits HIGH\n");
@@ -29,7 +32,7 @@ void setup()
   }
   uint32_t duration1 = micros() - start;
   Serial.print("FastShiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
 
   start = micros();
   for (int i = 0; i < 1000; i++)
@@ -39,9 +42,9 @@ void setup()
   }
   uint32_t duration2 = micros() - start;
   Serial.print("FastShiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("       Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
 
 
@@ -52,7 +55,7 @@ void setup()
   }
   duration1 = micros() - start;
   Serial.print("Standard shiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
 
   start = micros();
   for (int i = 0; i < 1000; i++)
@@ -62,9 +65,9 @@ void setup()
   }
   duration2 = micros() - start;
   Serial.print("Standard shiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("            Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
 
   Serial.println("done...");
@@ -76,5 +79,5 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
 
diff --git a/examples/fastShiftIn_test/fastShiftIn_test.ino b/examples/fastShiftIn_test/fastShiftIn_test.ino
index 92625f8..adc98f6 100644
--- a/examples/fastShiftIn_test/fastShiftIn_test.ino
+++ b/examples/fastShiftIn_test/fastShiftIn_test.ino
@@ -16,8 +16,11 @@ uint32_t start, duration1, duration2;
 void setup()
 {
   Serial.begin(115200);
+  Serial.println();
   Serial.println(__FILE__);
+  Serial.println("FASTSHIFTIN_LIB_VERSION: ");
   Serial.println(FASTSHIFTIN_LIB_VERSION);
+  Serial.println();
 
   FSI.setBitOrder(MSBFIRST);
 
@@ -58,7 +61,7 @@ void test_read()
   }
   duration1 = micros() - start;
   Serial.print("FastShiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
 
   start = micros();
@@ -69,9 +72,9 @@ void test_read()
   }
   duration2 = micros() - start;
   Serial.print("FastShiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("       Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -86,9 +89,9 @@ void test_read16()
   }
   duration1 = micros() - start;
   Serial.print("FastShiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
-  
+
   start = micros();
   for (int i = 0; i < 1000; i++)
   {
@@ -97,9 +100,9 @@ void test_read16()
   }
   duration2 = micros() - start;
   Serial.print("FastShiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("       Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -114,9 +117,9 @@ void test_read24()
   }
   duration1 = micros() - start;
   Serial.print("FastShiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
-  
+
   start = micros();
   for (int i = 0; i < 1000; i++)
   {
@@ -125,9 +128,9 @@ void test_read24()
   }
   duration2 = micros() - start;
   Serial.print("FastShiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("       Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -142,9 +145,9 @@ void test_read32()
   }
   duration1 = micros() - start;
   Serial.print("FastShiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
-  
+
   start = micros();
   for (int i = 0; i < 1000; i++)
   {
@@ -153,9 +156,9 @@ void test_read32()
   }
   duration2 = micros() - start;
   Serial.print("FastShiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("       Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -170,9 +173,9 @@ void test_readLSBFIRST()
   }
   duration1 = micros() - start;
   Serial.print("FastShiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
-  
+
   start = micros();
   for (int i = 0; i < 1000; i++)
   {
@@ -181,9 +184,9 @@ void test_readLSBFIRST()
   }
   duration2 = micros() - start;
   Serial.print("FastShiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("       Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -198,9 +201,9 @@ void test_readMSBFIRST()
   }
   duration1 = micros() - start;
   Serial.print("FastShiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
-  
+
   start = micros();
   for (int i = 0; i < 1000; i++)
   {
@@ -209,9 +212,9 @@ void test_readMSBFIRST()
   }
   duration2 = micros() - start;
   Serial.print("FastShiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("       Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
@@ -226,9 +229,9 @@ void test_reference()
   }
   duration1 = micros() - start;
   Serial.print("Standard shiftIn1: ");
-  Serial.println(duration1 * 0.001);
+  Serial.println(duration1 * 0.001f);
   delay(100);
-  
+
   start = micros();
   for (int i = 0; i < 1000; i++)
   {
@@ -237,9 +240,9 @@ void test_reference()
   }
   duration2 = micros() - start;
   Serial.print("Standard shiftIn2: ");
-  Serial.println(duration2 * 0.001);
+  Serial.println(duration2 * 0.001f);
   Serial.print("            Delta: ");
-  Serial.println((duration2 - duration1) * 0.001);
+  Serial.println((duration2 - duration1) * 0.001f);
   Serial.println();
   delay(100);
 }
diff --git a/examples/fastShiftIn_test_read/fastShiftIn_test_read.ino b/examples/fastShiftIn_test_read/fastShiftIn_test_read.ino
index 49aaee7..2b4550c 100644
--- a/examples/fastShiftIn_test_read/fastShiftIn_test_read.ino
+++ b/examples/fastShiftIn_test_read/fastShiftIn_test_read.ino
@@ -13,12 +13,15 @@ FastShiftIn FSI(8, 9);
 void setup()
 {
   Serial.begin(115200);
+  Serial.println();
   Serial.println(__FILE__);
+  Serial.println("FASTSHIFTIN_LIB_VERSION: ");
   Serial.println(FASTSHIFTIN_LIB_VERSION);
+  Serial.println();
 
   uint8_t x = FSI.read();
   Serial.println(x, HEX);
-  
+
   x = FSI.readLSBFIRST();
   Serial.println(x, HEX);
 
@@ -34,4 +37,4 @@ void loop()
 }
 
 
-// -- END OF FILE --
+//  -- END OF FILE --
diff --git a/library.json b/library.json
index edbe25d..b2e0154 100644
--- a/library.json
+++ b/library.json
@@ -15,7 +15,7 @@
     "type": "git",
     "url": "https://github.com/RobTillaart/FastShiftIn.git"
   },
-  "version": "0.4.0",
+  "version": "0.4.1",
   "license": "MIT",
   "frameworks": "*",
   "platforms": "*",
diff --git a/library.properties b/library.properties
index bdff2f6..9ba15dd 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=FastShiftIn
-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 (AVR) optimized shiftIn - e.g. for 74HC165