diff --git a/src/Common/CharacterSetEci.php b/src/Common/CharacterSetEci.php
index 8b62b8c..6c35d1b 100644
--- a/src/Common/CharacterSetEci.php
+++ b/src/Common/CharacterSetEci.php
@@ -87,7 +87,7 @@ final class CharacterSetEci extends AbstractEnum
     /**
      * @param int[] $values
      */
-    public function __construct(private readonly array $values, string ...$otherEncodingNames)
+    public function __construct(private array $values, string ...$otherEncodingNames)
     {
         $this->otherEncodingNames = $otherEncodingNames;
     }
diff --git a/src/Common/EcBlock.php b/src/Common/EcBlock.php
index bc9e865..6f8c606 100644
--- a/src/Common/EcBlock.php
+++ b/src/Common/EcBlock.php
@@ -11,7 +11,7 @@ namespace BaconQrCode\Common;
  */
 final class EcBlock
 {
-    public function __construct(private readonly int $count, private readonly int $dataCodewords)
+    public function __construct(private int $count, private int $dataCodewords)
     {
     }

diff --git a/src/Common/EcBlocks.php b/src/Common/EcBlocks.php
index 63c52a9..3464dc6 100644
--- a/src/Common/EcBlocks.php
+++ b/src/Common/EcBlocks.php
@@ -19,7 +19,7 @@ final class EcBlocks
      */
     private array $ecBlocks;
 
-    public function __construct(private readonly int $ecCodewordsPerBlock, EcBlock ...$ecBlocks)
+    public function __construct(private int $ecCodewordsPerBlock, EcBlock ...$ecBlocks)
     {
         $this->ecBlocks = $ecBlocks;
     }
diff --git a/src/Common/ErrorCorrectionLevel.php b/src/Common/ErrorCorrectionLevel.php
index ac84d66..449ef5f 100644
--- a/src/Common/ErrorCorrectionLevel.php
+++ b/src/Common/ErrorCorrectionLevel.php
@@ -21,7 +21,7 @@ final class ErrorCorrectionLevel extends AbstractEnum
     protected const Q = [0x03];
     protected const H = [0x02];
 
-    protected function __construct(private readonly int $bits)
+    protected function __construct(private int $bits)
     {
     }
 
diff --git a/src/Common/Mode.php b/src/Common/Mode.php
index f5fb153..521c910 100644
--- a/src/Common/Mode.php
+++ b/src/Common/Mode.php
@@ -36,8 +36,8 @@ final class Mode extends AbstractEnum
      * @param int[] $characterCountBitsForVersions
      */
     protected function __construct(
-        private readonly array $characterCountBitsForVersions,
-        private readonly int   $bits
+        private array $characterCountBitsForVersions,
+        private int   $bits
     ) {
     }
 
diff --git a/src/Encoder/BlockPair.php b/src/Encoder/BlockPair.php
index b1dc5c4..0e6118d 100644
--- a/src/Encoder/BlockPair.php
+++ b/src/Encoder/BlockPair.php
@@ -17,8 +17,8 @@ final class BlockPair
      * @param SplFixedArray<int> $errorCorrectionBytes Error correction bytes in the block.
      */
     public function __construct(
-        private readonly SplFixedArray $dataBytes,
-        private readonly SplFixedArray $errorCorrectionBytes
+        private SplFixedArray $dataBytes,
+        private SplFixedArray $errorCorrectionBytes
     ) {
     }
 
diff --git a/src/Encoder/ByteMatrix.php b/src/Encoder/ByteMatrix.php
index eefcf1c..ffdada6 100644
--- a/src/Encoder/ByteMatrix.php
+++ b/src/Encoder/ByteMatrix.php
@@ -18,7 +18,7 @@ final class ByteMatrix
      */
     private SplFixedArray $bytes;
 
-    public function __construct(private readonly int $width, private readonly int $height)
+    public function __construct(private int $width, private int $height)
     {
         $this->bytes = new SplFixedArray($height);
 
diff --git a/src/Encoder/QrCode.php b/src/Encoder/QrCode.php
index c3398f4..251aee8 100644
--- a/src/Encoder/QrCode.php
+++ b/src/Encoder/QrCode.php
@@ -28,9 +28,9 @@ final class QrCode
     private ByteMatrix $matrix;
 
     public function __construct(
-        private readonly Mode                 $mode,
-        private readonly ErrorCorrectionLevel $errorCorrectionLevel,
-        private readonly Version              $version,
+        private Mode                 $mode,
+        private ErrorCorrectionLevel $errorCorrectionLevel,
+        private Version              $version,
         int                                   $maskPattern,
         ByteMatrix                            $matrix
     ) {
diff --git a/src/Renderer/Color/Alpha.php b/src/Renderer/Color/Alpha.php
index 067a554..cfc289f 100644
--- a/src/Renderer/Color/Alpha.php
+++ b/src/Renderer/Color/Alpha.php
@@ -10,7 +10,7 @@ final class Alpha implements ColorInterface
     /**
      * @param int $alpha the alpha value, 0 to 100
      */
-    public function __construct(private readonly int $alpha, private readonly ColorInterface $baseColor)
+    public function __construct(private int $alpha, private ColorInterface $baseColor)
     {
         if ($alpha < 0 || $alpha > 100) {
             throw new Exception\InvalidArgumentException('Alpha must be between 0 and 100');
diff --git a/src/Renderer/Color/Cmyk.php b/src/Renderer/Color/Cmyk.php
index eaf34f4..a8e5ce1 100644
--- a/src/Renderer/Color/Cmyk.php
+++ b/src/Renderer/Color/Cmyk.php
@@ -14,10 +14,10 @@ final class Cmyk implements ColorInterface
      * @param int $black the black amount, 0 to 100
      */
     public function __construct(
-        private readonly int $cyan,
-        private readonly int $magenta,
-        private readonly int $yellow,
-        private readonly int $black
+        private int $cyan,
+        private int $magenta,
+        private int $yellow,
+        private int $black
     ) {
         if ($cyan < 0 || $cyan > 100) {
             throw new Exception\InvalidArgumentException('Cyan must be between 0 and 100');
diff --git a/src/Renderer/Color/Gray.php b/src/Renderer/Color/Gray.php
index 760b861..4dee81b 100644
--- a/src/Renderer/Color/Gray.php
+++ b/src/Renderer/Color/Gray.php
@@ -10,7 +10,7 @@ final class Gray implements ColorInterface
     /**
      * @param int $gray the gray value between 0 (black) and 100 (white)
      */
-    public function __construct(private readonly int $gray)
+    public function __construct(private int $gray)
     {
         if ($gray < 0 || $gray > 100) {
             throw new Exception\InvalidArgumentException('Gray must be between 0 and 100');
diff --git a/src/Renderer/Color/Rgb.php b/src/Renderer/Color/Rgb.php
index 051c5be..3eb7cd6 100644
--- a/src/Renderer/Color/Rgb.php
+++ b/src/Renderer/Color/Rgb.php
@@ -12,7 +12,7 @@ final class Rgb implements ColorInterface
      * @param int $green the green amount of the color, 0 to 255
      * @param int $blue the blue amount of the color, 0 to 255
      */
-    public function __construct(private readonly int $red, private readonly int $green, private readonly int $blue)
+    public function __construct(private int $red, private int $green, private int $blue)
     {
         if ($red < 0 || $red > 255) {
             throw new Exception\InvalidArgumentException('Red must be between 0 and 255');
diff --git a/src/Renderer/Eye/CompositeEye.php b/src/Renderer/Eye/CompositeEye.php
index 379e5c7..2fa0622 100644
--- a/src/Renderer/Eye/CompositeEye.php
+++ b/src/Renderer/Eye/CompositeEye.php
@@ -10,7 +10,7 @@ use BaconQrCode\Renderer\Path\Path;
  */
 final class CompositeEye implements EyeInterface
 {
-    public function __construct(private readonly EyeInterface $externalEye, private readonly EyeInterface $internalEye)
+    public function __construct(private EyeInterface $externalEye, private EyeInterface $internalEye)
     {
     }
 
diff --git a/src/Renderer/Eye/ModuleEye.php b/src/Renderer/Eye/ModuleEye.php
index a8a3489..ee1540a 100644
--- a/src/Renderer/Eye/ModuleEye.php
+++ b/src/Renderer/Eye/ModuleEye.php
@@ -12,7 +12,7 @@ use BaconQrCode\Renderer\Path\Path;
  */
 final class ModuleEye implements EyeInterface
 {
-    public function __construct(private readonly ModuleInterface $module)
+    public function __construct(private ModuleInterface $module)
     {
     }
 
diff --git a/src/Renderer/ImageRenderer.php b/src/Renderer/ImageRenderer.php
index 0d33303..0f99770 100644
--- a/src/Renderer/ImageRenderer.php
+++ b/src/Renderer/ImageRenderer.php
@@ -14,8 +14,8 @@ use BaconQrCode\Renderer\RendererStyle\RendererStyle;
 final class ImageRenderer implements RendererInterface
 {
     public function __construct(
-        private readonly RendererStyle         $rendererStyle,
-        private readonly ImageBackEndInterface $imageBackEnd
+        private RendererStyle         $rendererStyle,
+        private ImageBackEndInterface $imageBackEnd
     ) {
     }
 
diff --git a/src/Renderer/Module/DotsModule.php b/src/Renderer/Module/DotsModule.php
index c5d5c6f..6cf0d2c 100644
--- a/src/Renderer/Module/DotsModule.php
+++ b/src/Renderer/Module/DotsModule.php
@@ -16,7 +16,7 @@ final class DotsModule implements ModuleInterface
     public const MEDIUM = .8;
     public const SMALL = .6;
 
-    public function __construct(private readonly float $size)
+    public function __construct(private float $size)
     {
         if ($size <= 0 || $size > 1) {
             throw new InvalidArgumentException('Size must between 0 (exclusive) and 1 (inclusive)');
diff --git a/src/Renderer/Module/EdgeIterator/Edge.php b/src/Renderer/Module/EdgeIterator/Edge.php
index 141d66c..f27a223 100644
--- a/src/Renderer/Module/EdgeIterator/Edge.php
+++ b/src/Renderer/Module/EdgeIterator/Edge.php
@@ -23,7 +23,7 @@ final class Edge
 
     private int $maxY = -1;
 
-    public function __construct(private readonly bool $positive)
+    public function __construct(private bool $positive)
     {
     }
 
diff --git a/src/Renderer/Path/Curve.php b/src/Renderer/Path/Curve.php
index 5233e49..8640568 100644
--- a/src/Renderer/Path/Curve.php
+++ b/src/Renderer/Path/Curve.php
@@ -6,12 +6,12 @@ namespace BaconQrCode\Renderer\Path;
 final class Curve implements OperationInterface
 {
     public function __construct(
-        private readonly float $x1,
-        private readonly float $y1,
-        private readonly float $x2,
-        private readonly float $y2,
-        private readonly float $x3,
-        private readonly float $y3
+        private float $x1,
+        private float $y1,
+        private float $x2,
+        private float $y2,
+        private float $x3,
+        private float $y3
     ) {
     }
 
diff --git a/src/Renderer/Path/EllipticArc.php b/src/Renderer/Path/EllipticArc.php
index 800a032..49a2574 100644
--- a/src/Renderer/Path/EllipticArc.php
+++ b/src/Renderer/Path/EllipticArc.php
@@ -15,10 +15,10 @@ final class EllipticArc implements OperationInterface
         float                  $xRadius,
         float                  $yRadius,
         float                  $xAxisAngle,
-        private readonly bool  $largeArc,
-        private readonly bool  $sweep,
-        private readonly float $x,
-        private readonly float $y
+        private bool  $largeArc,
+        private bool  $sweep,
+        private float $x,
+        private float $y
     ) {
         $this->xRadius = abs($xRadius);
         $this->yRadius = abs($yRadius);
diff --git a/src/Renderer/Path/Line.php b/src/Renderer/Path/Line.php
index dec46fd..56f1f84 100644
--- a/src/Renderer/Path/Line.php
+++ b/src/Renderer/Path/Line.php
@@ -5,7 +5,7 @@ namespace BaconQrCode\Renderer\Path;
 
 final class Line implements OperationInterface
 {
-    public function __construct(private readonly float $x, private readonly float $y)
+    public function __construct(private float $x, private float $y)
     {
     }
 
diff --git a/src/Renderer/Path/Move.php b/src/Renderer/Path/Move.php
index c3c9a56..b7475ae 100644
--- a/src/Renderer/Path/Move.php
+++ b/src/Renderer/Path/Move.php
@@ -5,7 +5,7 @@ namespace BaconQrCode\Renderer\Path;
 
 final class Move implements OperationInterface
 {
-    public function __construct(private readonly float $x, private readonly float $y)
+    public function __construct(private float $x, private float $y)
     {
     }
 
diff --git a/src/Renderer/PlainTextRenderer.php b/src/Renderer/PlainTextRenderer.php
index 219bbf3..879ea0b 100644
--- a/src/Renderer/PlainTextRenderer.php
+++ b/src/Renderer/PlainTextRenderer.php
@@ -28,7 +28,7 @@ final class PlainTextRenderer implements RendererInterface
      */
     private const EMPTY_BLOCK = "\xc2\xa0";
 
-    public function __construct(private readonly int $margin = 2)
+    public function __construct(private int $margin = 2)
     {
     }
 
diff --git a/src/Renderer/RendererStyle/EyeFill.php b/src/Renderer/RendererStyle/EyeFill.php
index 9953b55..05c591d 100644
--- a/src/Renderer/RendererStyle/EyeFill.php
+++ b/src/Renderer/RendererStyle/EyeFill.php
@@ -11,8 +11,8 @@ final class EyeFill
     private static ?EyeFill $inherit = null;
 
     public function __construct(
-        private readonly ?ColorInterface $externalColor,
-        private readonly ?ColorInterface $internalColor
+        private ?ColorInterface $externalColor,
+        private ?ColorInterface $internalColor
     ) {
     }
 
diff --git a/src/Renderer/RendererStyle/Fill.php b/src/Renderer/RendererStyle/Fill.php
index 19de25d..7835c51 100644
--- a/src/Renderer/RendererStyle/Fill.php
+++ b/src/Renderer/RendererStyle/Fill.php
@@ -12,12 +12,12 @@ final class Fill
     private static ?Fill $default = null;
 
     private function __construct(
-        private readonly ColorInterface  $backgroundColor,
-        private readonly ?ColorInterface $foregroundColor,
-        private readonly ?Gradient       $foregroundGradient,
-        private readonly EyeFill         $topLeftEyeFill,
-        private readonly EyeFill         $topRightEyeFill,
-        private readonly EyeFill $bottomLeftEyeFill
+        private ColorInterface  $backgroundColor,
+        private ?ColorInterface $foregroundColor,
+        private ?Gradient       $foregroundGradient,
+        private EyeFill         $topLeftEyeFill,
+        private EyeFill         $topRightEyeFill,
+        private EyeFill $bottomLeftEyeFill
     ) {
     }
 
diff --git a/src/Renderer/RendererStyle/Gradient.php b/src/Renderer/RendererStyle/Gradient.php
index eea4031..477aa09 100644
--- a/src/Renderer/RendererStyle/Gradient.php
+++ b/src/Renderer/RendererStyle/Gradient.php
@@ -8,9 +8,9 @@ use BaconQrCode\Renderer\Color\ColorInterface;
 final class Gradient
 {
     public function __construct(
-        private readonly ColorInterface $startColor,
-        private readonly ColorInterface $endColor,
-        private readonly GradientType   $type
+        private ColorInterface $startColor,
+        private ColorInterface $endColor,
+        private GradientType   $type
     ) {
     }
 
diff --git a/src/Writer.php b/src/Writer.php
index d7f7ebb..59fa47f 100644
--- a/src/Writer.php
+++ b/src/Writer.php
@@ -17,7 +17,7 @@ final class Writer
     /**
      * Creates a new writer with a specific renderer.
      */
-    public function __construct(private readonly RendererInterface $renderer)
+    public function __construct(private RendererInterface $renderer)
     {
     }