diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b958aa0..2b690c8 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,12 +21,18 @@ jobs:
       fail-fast: false
       matrix:
         php: ['8.2', '8.3', '8.4']
-        laravel: ['11.*', '12.*']
+        laravel: ['11.*', '12.*', '13.*']
+        exclude:
+          # Laravel 13 requires PHP 8.3+.
+          - php: '8.2'
+            laravel: '13.*'
         include:
           - laravel: '11.*'
             testbench: '9.*'
           - laravel: '12.*'
             testbench: '10.*'
+          - laravel: '13.*'
+            testbench: '11.*'
 
     name: PHP ${{ matrix.php }} - Laravel ${{ matrix.laravel }}
 
@@ -73,7 +79,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.3'
+          php-version: '8.4'
           extensions: mbstring, json
           coverage: none
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 36da600..2c831ea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,3 +20,5 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   listener writing to a configurable log channel.
 - `AbstractAdapterRequest` / `AbstractAdapterResponse` base DTOs and the
   `ExtractsTolerantFields` trait for casing-tolerant parsing of inconsistent third-party APIs.
+- Laravel 13 support (`illuminate/*` `^13.0`), tested in CI on PHP 8.3 and 8.4 against
+  `orchestra/testbench` `^11.0`. Laravel 11 and 12 remain supported.
diff --git a/README.md b/README.md
index 5b50642..abe2c1c 100644
--- a/README.md
+++ b/README.md
@@ -31,8 +31,8 @@ package extracts that into a single abstraction:
 
 ## Requirements
 
-- PHP 8.2+
-- Laravel 11 or 12
+- PHP 8.2+ (PHP 8.3+ for Laravel 13)
+- Laravel 11, 12, or 13
 
 ## Installation
 
diff --git a/composer.json b/composer.json
index 1a44cba..7fb9226 100644
--- a/composer.json
+++ b/composer.json
@@ -17,14 +17,14 @@
     ],
     "require": {
         "php": "^8.2",
-        "illuminate/support": "^11.0|^12.0",
-        "illuminate/http": "^11.0|^12.0",
-        "illuminate/contracts": "^11.0|^12.0"
+        "illuminate/support": "^11.0|^12.0|^13.0",
+        "illuminate/http": "^11.0|^12.0|^13.0",
+        "illuminate/contracts": "^11.0|^12.0|^13.0"
     },
     "require-dev": {
-        "orchestra/testbench": "^9.0|^10.0",
-        "pestphp/pest": "^2.0|^3.0",
-        "pestphp/pest-plugin-laravel": "^2.0|^3.0",
+        "orchestra/testbench": "^9.0|^10.0|^11.0",
+        "pestphp/pest": "^2.0|^3.0|^4.0",
+        "pestphp/pest-plugin-laravel": "^2.0|^3.0|^4.0",
         "larastan/larastan": "^2.0|^3.0",
         "laravel/pint": "^1.0"
     },
diff --git a/src/AdapterManager.php b/src/AdapterManager.php
index bd54a19..6c25536 100644
--- a/src/AdapterManager.php
+++ b/src/AdapterManager.php
@@ -29,7 +29,11 @@ public function getDefaultDriver(): string
     }
 
     /**
-     * @param  array<int, mixed>  $parameters
+     * The key type is left open because Laravel narrowed the parent's
+     * `$parameters` docblock from `array` to `array<string, mixed>` in 13.x,
+     * and this override has to stay compatible across 11.x-13.x.
+     *
+     * @param  array<array-key, mixed>  $parameters
      * @return AbstractApiClient
      */
     public function __call($method, $parameters)