diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5c97a1fa..9da4fd91 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com), and this
 
     Instead, if you have more than 1 proxy in front of Shlink, you should provide `TRUSTED_PROXIES` env var, with either a comma-separated list of the IP addresses of your proxies, or a number indicating how many proxies are there in front of Shlink.
 
+* [#2540](https://github.com/shlinkio/shlink/issues/2540) Update Symfony packages to 8.0.
+
 ### Deprecated
 * *Nothing*
 
diff --git a/composer.json b/composer.json
index 78200845..8755c856 100644
--- a/composer.json
+++ b/composer.json
@@ -41,22 +41,22 @@
         "pagerfanta/core": "^3.8",
         "ramsey/uuid": "^4.7",
         "shlinkio/doctrine-specification": "^2.2",
-        "shlinkio/shlink-common": "^7.2",
-        "shlinkio/shlink-config": "^4.0",
-        "shlinkio/shlink-event-dispatcher": "^4.3",
-        "shlinkio/shlink-importer": "^5.6",
-        "shlinkio/shlink-installer": "dev-develop#2b9e6bd as 10.0.0",
-        "shlinkio/shlink-ip-geolocation": "^4.4",
-        "shlinkio/shlink-json": "^1.2",
+        "shlinkio/shlink-common": "dev-main#f2550b5 as 7.3.0",
+        "shlinkio/shlink-config": "dev-main#fb186e4 as 4.1.0",
+        "shlinkio/shlink-event-dispatcher": "dev-main#54d4701 as 4.4.0",
+        "shlinkio/shlink-importer": "dev-main#4498f0a as 5.7.0",
+        "shlinkio/shlink-installer": "dev-develop#40e08cb as 10.0.0",
+        "shlinkio/shlink-ip-geolocation": "dev-main#e0c45b2 as 5.0.0",
+        "shlinkio/shlink-json": "dev-main#7c096d6 as 1.3.0",
         "spiral/roadrunner": "^2025.1",
         "spiral/roadrunner-cli": "^2.7",
         "spiral/roadrunner-http": "^3.5",
         "spiral/roadrunner-jobs": "^4.6",
-        "symfony/console": "^7.3",
-        "symfony/filesystem": "^7.3",
-        "symfony/lock": "^7.3.2",
-        "symfony/process": "^7.3",
-        "symfony/string": "^7.3"
+        "symfony/console": "^8.0 || ^7.4",
+        "symfony/filesystem": "^8.0",
+        "symfony/lock": "^8.0",
+        "symfony/process": "^8.0",
+        "symfony/string": "^8.0"
     },
     "require-dev": {
         "devizzent/cebe-php-openapi": "^1.1.2",
@@ -70,8 +70,8 @@
         "phpunit/phpunit": "^12.0.10",
         "roave/security-advisories": "dev-master",
         "shlinkio/php-coding-standard": "~2.5.0",
-        "shlinkio/shlink-test-utils": "^4.3.1",
-        "symfony/var-dumper": "^7.3",
+        "shlinkio/shlink-test-utils": "^4.4",
+        "symfony/var-dumper": "^8.0",
         "veewee/composer-run-parallel": "^1.4"
     },
     "conflict": {
diff --git a/module/CLI/test/Command/Integration/MatomoSendVisitsCommandTest.php b/module/CLI/test/Command/Integration/MatomoSendVisitsCommandTest.php
index f4eebdf5..dadce789 100644
--- a/module/CLI/test/Command/Integration/MatomoSendVisitsCommandTest.php
+++ b/module/CLI/test/Command/Integration/MatomoSendVisitsCommandTest.php
@@ -114,6 +114,7 @@ class MatomoSendVisitsCommandTest extends TestCase
     }
 
     /**
+     * @param list<string> $input
      * @return array{string, int, MatomoSendVisitsCommand}
      */
     private function executeCommand(
diff --git a/module/CLI/test/Command/ShortUrl/DeleteShortUrlCommandTest.php b/module/CLI/test/Command/ShortUrl/DeleteShortUrlCommandTest.php
index 6ffec859..62872123 100644
--- a/module/CLI/test/Command/ShortUrl/DeleteShortUrlCommandTest.php
+++ b/module/CLI/test/Command/ShortUrl/DeleteShortUrlCommandTest.php
@@ -64,6 +64,9 @@ class DeleteShortUrlCommandTest extends TestCase
         self::assertStringContainsString(sprintf('No URL found with short code "%s"', $shortCode), $output);
     }
 
+    /**
+     * @param list<string> $retryAnswer
+     */
     #[Test, DataProvider('provideRetryDeleteAnswers')]
     public function deleteIsRetriedWhenThresholdIsReachedAndQuestionIsAccepted(
         array $retryAnswer,
diff --git a/module/CLI/test/Command/ShortUrl/DeleteShortUrlVisitsCommandTest.php b/module/CLI/test/Command/ShortUrl/DeleteShortUrlVisitsCommandTest.php
index de038aef..3efa94b5 100644
--- a/module/CLI/test/Command/ShortUrl/DeleteShortUrlVisitsCommandTest.php
+++ b/module/CLI/test/Command/ShortUrl/DeleteShortUrlVisitsCommandTest.php
@@ -27,6 +27,9 @@ class DeleteShortUrlVisitsCommandTest extends TestCase
         $this->commandTester = CliTestUtils::testerForCommand(new DeleteShortUrlVisitsCommand($this->deleter));
     }
 
+    /**
+     * @param list<string> $input
+     */
     #[Test, DataProvider('provideCancellingInputs')]
     public function executionIsAbortedIfManuallyCancelled(array $input): void
     {
diff --git a/module/CLI/test/Command/Visit/LocateVisitsCommandTest.php b/module/CLI/test/Command/Visit/LocateVisitsCommandTest.php
index ca7db909..2c82247f 100644
--- a/module/CLI/test/Command/Visit/LocateVisitsCommandTest.php
+++ b/module/CLI/test/Command/Visit/LocateVisitsCommandTest.php
@@ -81,7 +81,7 @@ class LocateVisitsCommandTest extends TestCase
                            ->willReturnCallback($mockMethodBehavior);
         $this->visitToLocation->expects(
             $this->exactly($expectedUnlocatedCalls + $expectedEmptyCalls + $expectedAllCalls),
-        )->method('resolveVisitLocation')->withAnyParameters()->willReturn(Location::emptyInstance());
+        )->method('resolveVisitLocation')->withAnyParameters()->willReturn(Location::empty());
         $this->downloadDbCommand->method('run')->willReturn(Command::SUCCESS);
 
         $this->commandTester->setInputs(['y']);
@@ -204,6 +204,9 @@ class LocateVisitsCommandTest extends TestCase
         self::assertStringContainsString('The --all flag has no effect on its own', $output);
     }
 
+    /**
+     * @param list<string> $inputs
+     */
     #[Test, DataProvider('provideAbortInputs')]
     public function processingAllCancelsCommandIfUserDoesNotActivelyAgreeToConfirmation(array $inputs): void
     {
diff --git a/module/CLI/test/Util/CliTestUtils.php b/module/CLI/test/Util/CliTestUtils.php
index 5f94c661..bacde361 100644
--- a/module/CLI/test/Util/CliTestUtils.php
+++ b/module/CLI/test/Util/CliTestUtils.php
@@ -40,9 +40,9 @@ class CliTestUtils
     public static function testerForCommand(Command $mainCommand, Command ...$extraCommands): CommandTester
     {
         $app = new Application();
-        $app->add($mainCommand);
+        $app->addCommand($mainCommand);
         foreach ($extraCommands as $command) {
-            $app->add($command);
+            $app->addCommand($command);
         }
 
         return new CommandTester($mainCommand);
diff --git a/module/Core/test/EventDispatcher/LocateUnlocatedVisitsTest.php b/module/Core/test/EventDispatcher/LocateUnlocatedVisitsTest.php
index ef776d42..d8168f6e 100644
--- a/module/Core/test/EventDispatcher/LocateUnlocatedVisitsTest.php
+++ b/module/Core/test/EventDispatcher/LocateUnlocatedVisitsTest.php
@@ -40,7 +40,7 @@ class LocateUnlocatedVisitsTest extends TestCase
     public function visitToLocationHelperIsCalledToGeolocateVisits(): void
     {
         $visit = Visit::forBasePath(Visitor::empty());
-        $location = Location::emptyInstance();
+        $location = Location::empty();
 
         $this->visitToLocation->expects($this->once())->method('resolveVisitLocation')->with($visit)->willReturn(
             $location,
diff --git a/module/Core/test/Visit/Geolocation/VisitLocatorTest.php b/module/Core/test/Visit/Geolocation/VisitLocatorTest.php
index 68c746d7..0d51b402 100644
--- a/module/Core/test/Visit/Geolocation/VisitLocatorTest.php
+++ b/module/Core/test/Visit/Geolocation/VisitLocatorTest.php
@@ -67,7 +67,7 @@ class VisitLocatorTest extends TestCase
         $this->visitService->{$serviceMethodName}(new class implements VisitGeolocationHelperInterface {
             public function geolocateVisit(Visit $visit): Location
             {
-                return Location::emptyInstance();
+                return Location::empty();
             }
 
             public function onVisitLocated(VisitLocation $visitLocation, Visit $visit): void