diff --git a/src/Command/UpdateDatabaseCommand.php b/src/Command/UpdateDatabaseCommand.php
index e3ad51f..0471de8 100644
--- a/src/Command/UpdateDatabaseCommand.php
+++ b/src/Command/UpdateDatabaseCommand.php
@@ -26,13 +26,13 @@ class UpdateDatabaseCommand extends Command
     private $downloader;
 
     /**
-     * @var array[]
+     * @var array<string, ?array{url?: string|false, path?: string|false, locales?: string[], license?: ?string, edition?: string}>
      */
     private $databases;
 
     /**
-     * @param Downloader $downloader
-     * @param array[]    $databases
+     * @param Downloader                                                                                                              $downloader
+     * @param array<string, ?array{url?: string|false, path?: string|false, locales?: string[], license?: ?string, edition?: string}> $databases
      */
     public function __construct(Downloader $downloader, array $databases)
     {
diff --git a/src/DependencyInjection/GpsLabGeoIP2Extension.php b/src/DependencyInjection/GpsLabGeoIP2Extension.php
index e09fe1a..9deed2b 100644
--- a/src/DependencyInjection/GpsLabGeoIP2Extension.php
+++ b/src/DependencyInjection/GpsLabGeoIP2Extension.php
@@ -29,10 +29,6 @@ class GpsLabGeoIP2Extension extends Extension
      */
     private const SERVICE_NAME = 'geoip2.database.%s_reader';
 
-    /**
-     * @param array[]          $configs
-     * @param ContainerBuilder $container
-     */
     public function load(array $configs, ContainerBuilder $container): void
     {
         $configuration = $this->getConfiguration($configs, $container);
@@ -102,8 +98,8 @@ public function load(array $configs, ContainerBuilder $container): void
     }
 
     /**
-     * @param array[]          $config
-     * @param ContainerBuilder $container
+     * @param array<array<mixed>> $config
+     * @param ContainerBuilder    $container
      *
      * @return Configuration
      */
diff --git a/src/Reader/ReaderFactory.php b/src/Reader/ReaderFactory.php
index 067bdbc..a8847d6 100644
--- a/src/Reader/ReaderFactory.php
+++ b/src/Reader/ReaderFactory.php
@@ -16,18 +16,18 @@
 class ReaderFactory
 {
     /**
-     * @var array[]
+     * @var array<string, ?array{url?: string|false, path?: string|false, locales?: string[], license?: ?string, edition?: string}>
      */
     private $databases;
 
     /**
-     * @var string
+     * @var class-string<Reader>
      */
     private $reader_class;
 
     /**
-     * @param array[] $databases
-     * @param string  $reader_class
+     * @param array<string, ?array{url?: string|false, path?: string|false, locales?: string[], license?: ?string, edition?: string}> $databases
+     * @param class-string<Reader>                                                                                                    $reader_class
      */
     public function __construct(array $databases, string $reader_class = Reader::class)
     {
diff --git a/tests/DependencyInjection/ConfigurationTest.php b/tests/DependencyInjection/ConfigurationTest.php
index 004066e..0f6c584 100644
--- a/tests/DependencyInjection/ConfigurationTest.php
+++ b/tests/DependencyInjection/ConfigurationTest.php
@@ -162,8 +162,8 @@ public function getBadConfigs(): iterable
     /**
      * @dataProvider getBadConfigs
      *
-     * @param string|null $cache_dir
-     * @param array[]     $configs
+     * @param string|null         $cache_dir
+     * @param array<array<mixed>> $configs
      */
     public function testBadConfigs(?string $cache_dir, array $configs): void
     {
@@ -177,7 +177,7 @@ public function testBadConfigs(?string $cache_dir, array $configs): void
     }
 
     /**
-     * @return mixed[]
+     * @return array<array<mixed>>
      */
     public function getConfigs(): iterable
     {
@@ -430,9 +430,9 @@ public function getConfigs(): iterable
     /**
      * @dataProvider getConfigs
      *
-     * @param string|null $cache_dir
-     * @param array[]     $configs
-     * @param array[]     $expected
+     * @param string|null         $cache_dir
+     * @param array<array<mixed>> $configs
+     * @param array<array<mixed>> $expected
      */
     public function testConfigs(?string $cache_dir, array $configs, array $expected): void
     {
diff --git a/tests/Reader/ReaderFactoryTest.php b/tests/Reader/ReaderFactoryTest.php
index 7988b9c..2614b8b 100644
--- a/tests/Reader/ReaderFactoryTest.php
+++ b/tests/Reader/ReaderFactoryTest.php
@@ -18,7 +18,7 @@
 class ReaderFactoryTest extends TestCase
 {
     /**
-     * @return array[]
+     * @return list<list<?list<string>>>
      */
     public function getLocales(): array
     {