diff --git a/CHANGELOG.md b/CHANGELOG.md
index c03bc24..c0b0225 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,23 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com), and this project adheres to [Semantic Versioning](https://semver.org).
 
+## [Unreleased]
+### Added
+* *Nothing*
+
+### Changed
+* Update shlinkio coding standard to v2.4
+
+### Deprecated
+* *Nothing*
+
+### Removed
+* *Nothing*
+
+### Fixed
+* *Nothing*
+
+
 ## [5.4.0] - 2024-10-21
 ### Added
 * Add support for `laminas/laminas-servicemanager` v4.x.
diff --git a/composer.json b/composer.json
index 1c0d6ee..59d80ce 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
         "phpunit/phpunit": "^11.3",
         "psr/http-factory": "^1.1",
         "roave/security-advisories": "dev-master",
-        "shlinkio/php-coding-standard": "~2.3.0",
+        "shlinkio/php-coding-standard": "~2.4.0",
         "symfony/var-dumper": "^7.1"
     },
     "suggest": {
diff --git a/src/Exception/ImportException.php b/src/Exception/ImportException.php
index bd89aae..673f837 100644
--- a/src/Exception/ImportException.php
+++ b/src/Exception/ImportException.php
@@ -11,9 +11,9 @@ class ImportException extends RuntimeException implements ExceptionInterface
 {
     protected function __construct(
         string $message,
-        public readonly ?string $continueToken,
+        public readonly string|null $continueToken,
         int $code = 0,
-        ?Throwable $previous = null,
+        Throwable|null $previous = null,
     ) {
         parent::__construct($message, $code, $previous);
     }
diff --git a/src/Model/ImportedShlinkOrphanVisit.php b/src/Model/ImportedShlinkOrphanVisit.php
index 5664f18..56c1952 100644
--- a/src/Model/ImportedShlinkOrphanVisit.php
+++ b/src/Model/ImportedShlinkOrphanVisit.php
@@ -14,7 +14,7 @@ public function __construct(
         public readonly DateTimeInterface $date,
         public readonly string $visitedUrl,
         public readonly string $type,
-        public readonly ?ImportedShlinkVisitLocation $location,
+        public readonly ImportedShlinkVisitLocation|null $location,
     ) {
     }
 }
diff --git a/src/Model/ImportedShlinkUrl.php b/src/Model/ImportedShlinkUrl.php
index 5a1b166..d74a290 100644
--- a/src/Model/ImportedShlinkUrl.php
+++ b/src/Model/ImportedShlinkUrl.php
@@ -17,11 +17,11 @@ public function __construct(
         public readonly string $longUrl,
         public readonly array $tags,
         public readonly DateTimeInterface $createdAt,
-        public readonly ?string $domain,
+        public readonly string|null $domain,
         public readonly string $shortCode,
-        public readonly ?string $title,
+        public readonly string|null $title,
         public readonly iterable $visits = [],
-        public readonly ?int $visitsCount = null,
+        public readonly int|null $visitsCount = null,
         public ImportedShlinkUrlMeta $meta = new ImportedShlinkUrlMeta(),
     ) {
     }
diff --git a/src/Model/ImportedShlinkUrlMeta.php b/src/Model/ImportedShlinkUrlMeta.php
index 159d1f5..df07407 100644
--- a/src/Model/ImportedShlinkUrlMeta.php
+++ b/src/Model/ImportedShlinkUrlMeta.php
@@ -9,9 +9,9 @@
 final class ImportedShlinkUrlMeta
 {
     public function __construct(
-        public readonly ?DateTimeInterface $validSince = null,
-        public readonly ?DateTimeInterface $validUntil = null,
-        public readonly ?int $maxVisits = null,
+        public readonly DateTimeInterface|null $validSince = null,
+        public readonly DateTimeInterface|null $validUntil = null,
+        public readonly int|null $maxVisits = null,
     ) {
     }
 }
diff --git a/src/Model/ImportedShlinkVisit.php b/src/Model/ImportedShlinkVisit.php
index fbcd1f5..5e2d506 100644
--- a/src/Model/ImportedShlinkVisit.php
+++ b/src/Model/ImportedShlinkVisit.php
@@ -12,7 +12,7 @@ public function __construct(
         public readonly string $referer,
         public readonly string $userAgent,
         public readonly DateTimeInterface $date,
-        public readonly ?ImportedShlinkVisitLocation $location,
+        public readonly ImportedShlinkVisitLocation|null $location,
     ) {
     }
 }
diff --git a/src/Sources/Bitly/BitlyApiException.php b/src/Sources/Bitly/BitlyApiException.php
index 0704c04..2ec6f17 100644
--- a/src/Sources/Bitly/BitlyApiException.php
+++ b/src/Sources/Bitly/BitlyApiException.php
@@ -11,7 +11,7 @@
 
 class BitlyApiException extends ImportException
 {
-    public static function fromInvalidRequest(InvalidRequestException $e, ?string $continueToken = null): self
+    public static function fromInvalidRequest(InvalidRequestException $e, string|null $continueToken = null): self
     {
         return new self(sprintf(
             'Request to Bitly API v4 to URL "%s" failed with status code "%s" and body "%s"',
diff --git a/src/Sources/Bitly/BitlyApiParams.php b/src/Sources/Bitly/BitlyApiParams.php
index 734c2bf..d1616b1 100644
--- a/src/Sources/Bitly/BitlyApiParams.php
+++ b/src/Sources/Bitly/BitlyApiParams.php
@@ -14,7 +14,7 @@ private function __construct(
         public readonly bool $importCustomDomains,
         public readonly bool $keepCreationDate,
         public readonly bool $ignoreArchived,
-        public readonly ?string $continueToken = null,
+        public readonly string|null $continueToken = null,
     ) {
     }
 
diff --git a/src/Sources/Bitly/BitlyApiProgressTracker.php b/src/Sources/Bitly/BitlyApiProgressTracker.php
index 450772c..e5c48ef 100644
--- a/src/Sources/Bitly/BitlyApiProgressTracker.php
+++ b/src/Sources/Bitly/BitlyApiProgressTracker.php
@@ -17,8 +17,8 @@ final class BitlyApiProgressTracker
 {
     private const SEPARATOR = '__';
 
-    private ?string $lastProcessedGroup = null;
-    private ?string $lastProcessedUrlDate = null;
+    private string|null $lastProcessedGroup = null;
+    private string|null $lastProcessedUrlDate = null;
     private array $originalDecodedTokenParts = [];
     private DateTimeImmutable $startDate;
 
@@ -39,7 +39,7 @@ public static function initFromParams(BitlyApiParams $params): self
         return $instance;
     }
 
-    public function initialGroup(): ?string
+    public function initialGroup(): string|null
     {
         return $this->originalDecodedTokenParts[0] ?? null;
     }
@@ -64,7 +64,7 @@ public function startDate(): DateTimeImmutable
         return $this->startDate;
     }
 
-    public function generateContinueToken(): ?string
+    public function generateContinueToken(): string|null
     {
         if ($this->lastProcessedGroup === null) {
             return null;
diff --git a/src/Sources/Csv/CsvImporter.php b/src/Sources/Csv/CsvImporter.php
index 1760979..d66b13a 100644
--- a/src/Sources/Csv/CsvImporter.php
+++ b/src/Sources/Csv/CsvImporter.php
@@ -26,7 +26,7 @@
 
 class CsvImporter implements ImporterStrategyInterface
 {
-    public function __construct(private readonly ?DateTimeInterface $date = null)
+    public function __construct(private readonly DateTimeInterface|null $date = null)
     {
     }
 
@@ -83,7 +83,7 @@ private function remapRecordHeaders(array $record): array
     /**
      * @return non-empty-string|null
      */
-    private function nonEmptyValueOrNull(array $record, string $key): ?string
+    private function nonEmptyValueOrNull(array $record, string $key): string|null
     {
         $value = trim($record[$key] ?? '');
         return empty($value) ? null : $value;
diff --git a/src/Sources/Csv/CsvParamsConsoleHelper.php b/src/Sources/Csv/CsvParamsConsoleHelper.php
index 65ed9db..757bf50 100644
--- a/src/Sources/Csv/CsvParamsConsoleHelper.php
+++ b/src/Sources/Csv/CsvParamsConsoleHelper.php
@@ -30,7 +30,7 @@ public function requestParams(StyleInterface $io): array
     /**
      * @return resource
      */
-    public function pathToStream(?string $value)
+    public function pathToStream(string|null $value)
     {
         $value = trim($value ?? '');
         if ($value === '') {
diff --git a/src/Sources/Shlink/ShlinkImporter.php b/src/Sources/Shlink/ShlinkImporter.php
index 11c4f81..ed5cd34 100644
--- a/src/Sources/Shlink/ShlinkImporter.php
+++ b/src/Sources/Shlink/ShlinkImporter.php
@@ -124,7 +124,7 @@ private function mapUrls(array $urls, ShlinkParams $params): array
      * @throws JsonException
      * @throws InvalidRequestException
      */
-    private function loadVisits(string $shortCode, ?string $domain, ShlinkParams $params, int $page): Generator
+    private function loadVisits(string $shortCode, string|null $domain, ShlinkParams $params, int $page): Generator
     {
         $queryString = http_build_query(
             ['page' => $page, 'itemsPerPage' => self::VISITS_PER_PAGE, 'domain' => $domain],
diff --git a/src/Sources/Shlink/ShlinkMapper.php b/src/Sources/Shlink/ShlinkMapper.php
index a8def7a..cb14a2a 100644
--- a/src/Sources/Shlink/ShlinkMapper.php
+++ b/src/Sources/Shlink/ShlinkMapper.php
@@ -59,7 +59,7 @@ public function mapOrphanVisit(array $visit, DateTimeInterface $fallbackDate): I
         );
     }
 
-    private function mapVisitLocation(?array $visitLocation): ?ImportedShlinkVisitLocation
+    private function mapVisitLocation(array|null $visitLocation): ImportedShlinkVisitLocation|null
     {
         return $visitLocation === null ? null : new ImportedShlinkVisitLocation(
             $visitLocation['countryCode'] ?? '',
diff --git a/src/Sources/Yourls/YourlsParams.php b/src/Sources/Yourls/YourlsParams.php
index 931f083..3c2ba36 100644
--- a/src/Sources/Yourls/YourlsParams.php
+++ b/src/Sources/Yourls/YourlsParams.php
@@ -13,7 +13,7 @@ private function __construct(
         public readonly string $username,
         public readonly string $password,
         public readonly bool $importVisits,
-        public readonly ?string $domain,
+        public readonly string|null $domain,
     ) {
     }
 
diff --git a/src/Util/DateHelper.php b/src/Util/DateHelper.php
index 72a8bf2..7c07292 100644
--- a/src/Util/DateHelper.php
+++ b/src/Util/DateHelper.php
@@ -20,7 +20,7 @@ public static function dateFromAtom(string $atomDate): DateTimeImmutable
         return self::dateFromFormat(DateTimeInterface::ATOM, $atomDate);
     }
 
-    public static function nullableDateFromFormatWithDefault(string $format, ?string $date): DateTimeImmutable
+    public static function nullableDateFromFormatWithDefault(string $format, string|null $date): DateTimeImmutable
     {
         if ($date === null) {
             return new DateTimeImmutable();
@@ -29,7 +29,7 @@ public static function nullableDateFromFormatWithDefault(string $format, ?string
         return self::dateFromFormat($format, $date);
     }
 
-    public static function nullableDateFromAtom(?string $atomDate): ?DateTimeImmutable
+    public static function nullableDateFromAtom(string|null $atomDate): DateTimeImmutable|null
     {
         if ($atomDate === null) {
             return null;
diff --git a/test/Command/ImportCommandTest.php b/test/Command/ImportCommandTest.php
index bfe4336..cfc9069 100644
--- a/test/Command/ImportCommandTest.php
+++ b/test/Command/ImportCommandTest.php
@@ -75,7 +75,7 @@ public function exceptionIsThrownWhenInvalidSourceIsProvided(): void
     }
 
     #[Test, DataProvider('provideSource')]
-    public function dependenciesAreInvokedAsExpected(?string $providedSource, bool $expectSourceQuestion): void
+    public function dependenciesAreInvokedAsExpected(string|null $providedSource, bool $expectSourceQuestion): void
     {
         $source = $providedSource ?? ImportSource::BITLY->value;
         $params = ImportParams::fromSource(ImportSource::from($source));
diff --git a/test/Sources/Bitly/BitlyApiExceptionTest.php b/test/Sources/Bitly/BitlyApiExceptionTest.php
index 03e2af1..591ddc8 100644
--- a/test/Sources/Bitly/BitlyApiExceptionTest.php
+++ b/test/Sources/Bitly/BitlyApiExceptionTest.php
@@ -13,7 +13,7 @@
 class BitlyApiExceptionTest extends TestCase
 {
     #[Test, DataProvider('provideContinueToken')]
-    public function generatesExpectedMessage(?string $continueToken): void
+    public function generatesExpectedMessage(string|null $continueToken): void
     {
         $e = BitlyApiException::fromInvalidRequest(
             InvalidRequestException::fromResponseData('something.com', 500, 'Error body'),
diff --git a/test/Sources/Csv/CsvParamsConsoleHelperTest.php b/test/Sources/Csv/CsvParamsConsoleHelperTest.php
index 9702abd..dcac67f 100644
--- a/test/Sources/Csv/CsvParamsConsoleHelperTest.php
+++ b/test/Sources/Csv/CsvParamsConsoleHelperTest.php
@@ -39,7 +39,7 @@ public function requestsParams(): void
     }
 
     #[Test, DataProvider('provideEmptyStreamValues')]
-    public function pathToStreamThrowsExceptionWithInvalidValue(?string $value, string $expectedMessage): void
+    public function pathToStreamThrowsExceptionWithInvalidValue(string|null $value, string $expectedMessage): void
     {
         $this->expectException(InvalidPathException::class);
         $this->expectExceptionMessage($expectedMessage);