diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 7b70482..fb76963 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ['8.2', '8.3', '8.4']
+        php-versions: ['8.3', '8.4', '8.5']
       fail-fast: false
     steps:
       - uses: actions/checkout@v4
diff --git a/composer.json b/composer.json
index 03a54d6..b723b49 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "^8.2",
+        "php": "^8.3",
         "bacon/bacon-qr-code": "^3.0"
     },
     "require-dev": {
diff --git a/src/Writer/AbstractGdWriter.php b/src/Writer/AbstractGdWriter.php
index 5411c05..58f26dd 100644
--- a/src/Writer/AbstractGdWriter.php
+++ b/src/Writer/AbstractGdWriter.php
@@ -27,6 +27,7 @@ protected function getMatrix(QrCodeInterface $qrCode): MatrixInterface
         return $matrixFactory->create($qrCode);
     }
 
+    #[\Override]
     public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?LabelInterface $label = null, array $options = []): ResultInterface
     {
         if (!extension_loaded('gd')) {
@@ -195,6 +196,7 @@ private function addLabel(LabelInterface $label, GdResult $result): GdResult
         return new GdResult($result->getMatrix(), $targetImage);
     }
 
+    #[\Override]
     public function validateResult(ResultInterface $result, string $expectedData): void
     {
         $string = $result->getString();
diff --git a/src/Writer/BinaryWriter.php b/src/Writer/BinaryWriter.php
index 8e0c7e8..55cf72a 100644
--- a/src/Writer/BinaryWriter.php
+++ b/src/Writer/BinaryWriter.php
@@ -13,6 +13,7 @@
 
 final readonly class BinaryWriter implements WriterInterface
 {
+    #[\Override]
     public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?LabelInterface $label = null, array $options = []): ResultInterface
     {
         $matrixFactory = new MatrixFactory();
diff --git a/src/Writer/ConsoleWriter.php b/src/Writer/ConsoleWriter.php
index e3bb7c3..74449ae 100644
--- a/src/Writer/ConsoleWriter.php
+++ b/src/Writer/ConsoleWriter.php
@@ -13,6 +13,7 @@
 
 final readonly class ConsoleWriter implements WriterInterface
 {
+    #[\Override]
     public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?LabelInterface $label = null, $options = []): ResultInterface
     {
         $matrixFactory = new MatrixFactory();
diff --git a/src/Writer/DebugWriter.php b/src/Writer/DebugWriter.php
index 8910a80..5b505d9 100644
--- a/src/Writer/DebugWriter.php
+++ b/src/Writer/DebugWriter.php
@@ -13,6 +13,7 @@
 
 final readonly class DebugWriter implements WriterInterface, ValidatingWriterInterface
 {
+    #[\Override]
     public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?LabelInterface $label = null, array $options = []): ResultInterface
     {
         $matrixFactory = new MatrixFactory();
@@ -21,6 +22,7 @@ public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?Lab
         return new DebugResult($matrix, $qrCode, $logo, $label, $options);
     }
 
+    #[\Override]
     public function validateResult(ResultInterface $result, string $expectedData): void
     {
         if (!$result instanceof DebugResult) {
diff --git a/src/Writer/EpsWriter.php b/src/Writer/EpsWriter.php
index 2f41967..b135928 100644
--- a/src/Writer/EpsWriter.php
+++ b/src/Writer/EpsWriter.php
@@ -13,8 +13,9 @@
 
 final readonly class EpsWriter implements WriterInterface
 {
-    public const DECIMAL_PRECISION = 10;
+    public const int DECIMAL_PRECISION = 10;
 
+    #[\Override]
     public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?LabelInterface $label = null, array $options = []): ResultInterface
     {
         $matrixFactory = new MatrixFactory();
diff --git a/src/Writer/GifWriter.php b/src/Writer/GifWriter.php
index 031e02c..a27644f 100644
--- a/src/Writer/GifWriter.php
+++ b/src/Writer/GifWriter.php
@@ -13,6 +13,7 @@
 
 final readonly class GifWriter extends AbstractGdWriter
 {
+    #[\Override]
     public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?LabelInterface $label = null, array $options = []): ResultInterface
     {
         /** @var GdResult $gdResult */
diff --git a/src/Writer/PdfWriter.php b/src/Writer/PdfWriter.php
index 3f0cd73..6658c9c 100644
--- a/src/Writer/PdfWriter.php
+++ b/src/Writer/PdfWriter.php
@@ -13,12 +13,13 @@
 
 final readonly class PdfWriter implements WriterInterface
 {
-    public const WRITER_OPTION_UNIT = 'unit';
-    public const WRITER_OPTION_PDF = 'fpdf';
-    public const WRITER_OPTION_X = 'x';
-    public const WRITER_OPTION_Y = 'y';
-    public const WRITER_OPTION_LINK = 'link';
+    public const string WRITER_OPTION_UNIT = 'unit';
+    public const string WRITER_OPTION_PDF = 'fpdf';
+    public const string WRITER_OPTION_X = 'x';
+    public const string WRITER_OPTION_Y = 'y';
+    public const string WRITER_OPTION_LINK = 'link';
 
+    #[\Override]
     public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?LabelInterface $label = null, array $options = []): ResultInterface
     {
         $matrixFactory = new MatrixFactory();
diff --git a/src/Writer/PngWriter.php b/src/Writer/PngWriter.php
index 2bfcd97..e064158 100644
--- a/src/Writer/PngWriter.php
+++ b/src/Writer/PngWriter.php
@@ -13,9 +13,10 @@
 
 final readonly class PngWriter extends AbstractGdWriter
 {
-    public const WRITER_OPTION_COMPRESSION_LEVEL = 'compression_level';
-    public const WRITER_OPTION_NUMBER_OF_COLORS = 'number_of_colors';
+    public const string WRITER_OPTION_COMPRESSION_LEVEL = 'compression_level';
+    public const string WRITER_OPTION_NUMBER_OF_COLORS = 'number_of_colors';
 
+    #[\Override]
     public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?LabelInterface $label = null, array $options = []): ResultInterface
     {
         if (!isset($options[self::WRITER_OPTION_COMPRESSION_LEVEL])) {
diff --git a/src/Writer/Result/BinaryResult.php b/src/Writer/Result/BinaryResult.php
index 386fb6a..0587ce1 100644
--- a/src/Writer/Result/BinaryResult.php
+++ b/src/Writer/Result/BinaryResult.php
@@ -13,6 +13,7 @@ public function __construct(MatrixInterface $matrix)
         parent::__construct($matrix);
     }
 
+    #[\Override]
     public function getString(): string
     {
         $matrix = $this->getMatrix();
@@ -28,6 +29,7 @@ public function getString(): string
         return $binaryString;
     }
 
+    #[\Override]
     public function getMimeType(): string
     {
         return 'text/plain';
diff --git a/src/Writer/Result/ConsoleResult.php b/src/Writer/Result/ConsoleResult.php
index d3644db..e325881 100644
--- a/src/Writer/Result/ConsoleResult.php
+++ b/src/Writer/Result/ConsoleResult.php
@@ -9,7 +9,7 @@
 
 final class ConsoleResult extends AbstractResult
 {
-    private const TWO_BLOCKS = [
+    private const array TWO_BLOCKS = [
         0 => ' ',
         1 => "\xe2\x96\x80",
         2 => "\xe2\x96\x84",
@@ -36,11 +36,13 @@ public function __construct(
         );
     }
 
+    #[\Override]
     public function getMimeType(): string
     {
         return 'text/plain';
     }
 
+    #[\Override]
     public function getString(): string
     {
         $matrix = $this->getMatrix();
diff --git a/src/Writer/Result/DebugResult.php b/src/Writer/Result/DebugResult.php
index b632993..9cc15b0 100644
--- a/src/Writer/Result/DebugResult.php
+++ b/src/Writer/Result/DebugResult.php
@@ -29,6 +29,7 @@ public function setValidateResult(bool $validateResult): void
         $this->validateResult = $validateResult;
     }
 
+    #[\Override]
     public function getString(): string
     {
         $debugLines = [];
@@ -67,6 +68,7 @@ public function getString(): string
         return implode("\n", $debugLines);
     }
 
+    #[\Override]
     public function getMimeType(): string
     {
         return 'text/plain';
diff --git a/src/Writer/Result/EpsResult.php b/src/Writer/Result/EpsResult.php
index d801fd6..2591211 100644
--- a/src/Writer/Result/EpsResult.php
+++ b/src/Writer/Result/EpsResult.php
@@ -16,11 +16,13 @@ public function __construct(
         parent::__construct($matrix);
     }
 
+    #[\Override]
     public function getString(): string
     {
         return implode("\n", $this->lines);
     }
 
+    #[\Override]
     public function getMimeType(): string
     {
         return 'image/eps';
diff --git a/src/Writer/Result/GdResult.php b/src/Writer/Result/GdResult.php
index a58c3e4..1b6d859 100644
--- a/src/Writer/Result/GdResult.php
+++ b/src/Writer/Result/GdResult.php
@@ -20,11 +20,13 @@ public function getImage(): \GdImage
         return $this->image;
     }
 
+    #[\Override]
     public function getString(): string
     {
         throw new \Exception('You can only use this method in a concrete implementation');
     }
 
+    #[\Override]
     public function getMimeType(): string
     {
         throw new \Exception('You can only use this method in a concrete implementation');
diff --git a/src/Writer/Result/GifResult.php b/src/Writer/Result/GifResult.php
index 84b2497..02f90f7 100644
--- a/src/Writer/Result/GifResult.php
+++ b/src/Writer/Result/GifResult.php
@@ -6,6 +6,7 @@
 
 final class GifResult extends GdResult
 {
+    #[\Override]
     public function getString(): string
     {
         ob_start();
@@ -14,6 +15,7 @@ public function getString(): string
         return strval(ob_get_clean());
     }
 
+    #[\Override]
     public function getMimeType(): string
     {
         return 'image/gif';
diff --git a/src/Writer/Result/PdfResult.php b/src/Writer/Result/PdfResult.php
index f7746a2..f8c1f6e 100644
--- a/src/Writer/Result/PdfResult.php
+++ b/src/Writer/Result/PdfResult.php
@@ -20,11 +20,13 @@ public function getPdf(): \FPDF
         return $this->fpdf;
     }
 
+    #[\Override]
     public function getString(): string
     {
         return $this->fpdf->Output('S');
     }
 
+    #[\Override]
     public function getMimeType(): string
     {
         return 'application/pdf';
diff --git a/src/Writer/Result/PngResult.php b/src/Writer/Result/PngResult.php
index 8cdbc53..b865de3 100644
--- a/src/Writer/Result/PngResult.php
+++ b/src/Writer/Result/PngResult.php
@@ -17,6 +17,7 @@ public function __construct(
         parent::__construct($matrix, $image);
     }
 
+    #[\Override]
     public function getString(): string
     {
         ob_start();
@@ -28,6 +29,7 @@ public function getString(): string
         return strval(ob_get_clean());
     }
 
+    #[\Override]
     public function getMimeType(): string
     {
         return 'image/png';
diff --git a/src/Writer/Result/SvgResult.php b/src/Writer/Result/SvgResult.php
index 2c9d281..f178c18 100644
--- a/src/Writer/Result/SvgResult.php
+++ b/src/Writer/Result/SvgResult.php
@@ -21,6 +21,7 @@ public function getXml(): \SimpleXMLElement
         return $this->xml;
     }
 
+    #[\Override]
     public function getString(): string
     {
         $string = $this->xml->asXML();
@@ -36,6 +37,7 @@ public function getString(): string
         return $string;
     }
 
+    #[\Override]
     public function getMimeType(): string
     {
         return 'image/svg+xml';
diff --git a/src/Writer/Result/WebPResult.php b/src/Writer/Result/WebPResult.php
index 735f128..af86bc9 100644
--- a/src/Writer/Result/WebPResult.php
+++ b/src/Writer/Result/WebPResult.php
@@ -16,6 +16,7 @@ public function __construct(
         parent::__construct($matrix, $image);
     }
 
+    #[\Override]
     public function getString(): string
     {
         if (!function_exists('imagewebp')) {
@@ -28,6 +29,7 @@ public function getString(): string
         return strval(ob_get_clean());
     }
 
+    #[\Override]
     public function getMimeType(): string
     {
         return 'image/webp';
diff --git a/src/Writer/SvgWriter.php b/src/Writer/SvgWriter.php
index 9001279..f34be86 100644
--- a/src/Writer/SvgWriter.php
+++ b/src/Writer/SvgWriter.php
@@ -15,13 +15,14 @@
 
 final readonly class SvgWriter implements WriterInterface
 {
-    public const DECIMAL_PRECISION = 2;
-    public const WRITER_OPTION_COMPACT = 'compact';
-    public const WRITER_OPTION_BLOCK_ID = 'block_id';
-    public const WRITER_OPTION_EXCLUDE_XML_DECLARATION = 'exclude_xml_declaration';
-    public const WRITER_OPTION_EXCLUDE_SVG_WIDTH_AND_HEIGHT = 'exclude_svg_width_and_height';
-    public const WRITER_OPTION_FORCE_XLINK_HREF = 'force_xlink_href';
-
+    public const int DECIMAL_PRECISION = 2;
+    public const string WRITER_OPTION_COMPACT = 'compact';
+    public const string WRITER_OPTION_BLOCK_ID = 'block_id';
+    public const string WRITER_OPTION_EXCLUDE_XML_DECLARATION = 'exclude_xml_declaration';
+    public const string WRITER_OPTION_EXCLUDE_SVG_WIDTH_AND_HEIGHT = 'exclude_svg_width_and_height';
+    public const string WRITER_OPTION_FORCE_XLINK_HREF = 'force_xlink_href';
+
+    #[\Override]
     public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?LabelInterface $label = null, array $options = []): ResultInterface
     {
         if (!isset($options[self::WRITER_OPTION_COMPACT])) {
diff --git a/src/Writer/WebPWriter.php b/src/Writer/WebPWriter.php
index 2a95f35..a0e4fdc 100644
--- a/src/Writer/WebPWriter.php
+++ b/src/Writer/WebPWriter.php
@@ -13,8 +13,9 @@
 
 final readonly class WebPWriter extends AbstractGdWriter
 {
-    public const WRITER_OPTION_QUALITY = 'quality';
+    public const string WRITER_OPTION_QUALITY = 'quality';
 
+    #[\Override]
     public function write(QrCodeInterface $qrCode, ?LogoInterface $logo = null, ?LabelInterface $label = null, array $options = []): ResultInterface
     {
         if (!isset($options[self::WRITER_OPTION_QUALITY])) {