diff --git a/README.md b/README.md
index 0213bc4..a2f1809 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,10 @@ Or manually update `require` block of `composer.json` and run `composer update`.
 
 After you've installed the package via composer, you're done. There's no step two.
 
-This package will automatically register the `DragonCode\LaravelJsonResponse\Middlewares\SetHeaderMiddleware` middleware in the `web` and `api` groups, if they exist. The middleware will add a header `Accept` that will effectively convert all responses to JSON format. This header will apply to all responses.
+This package will automatically register the `DragonCode\LaravelJsonResponse\Middlewares\SetHeaderMiddleware` middleware in the `web` and `api` groups, if they exist. The
+middleware will add a header `Accept` that will effectively convert all responses to JSON format. This header will apply to all responses.
+
+> If you need to redefine the header for specific groups of routes, you can do this by changing the [`settings`](config/http.php).
 
 
 [badge_build]:          https://img.shields.io/github/workflow/status/TheDragonCode/laravel-json-response/phpunit?style=flat-square
diff --git a/config/http.php b/config/http.php
new file mode 100644
index 0000000..c3e3b75
--- /dev/null
+++ b/config/http.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+return [
+    'response' => [
+        /*
+         * This setting is responsible for applying middleware to routes.
+         *
+         * You can specify route group names to apply the `SetHeaderMiddleware`
+         * middleware to them, or specify null to apply it to all routes.
+         *
+         * For example,
+         *
+         *   json => null
+         *   json => 'api'
+         *   json => ['api', 'web']
+         */
+        'json' => null,
+    ],
+];
diff --git a/src/ServiceProvider.php b/src/ServiceProvider.php
index 984316a..0d52d20 100644
--- a/src/ServiceProvider.php
+++ b/src/ServiceProvider.php
@@ -4,6 +4,7 @@
 
 use DragonCode\LaravelJsonResponse\Middlewares\SetHeaderMiddleware;
 use Illuminate\Contracts\Http\Kernel;
+use Illuminate\Support\Arr;
 use Illuminate\Support\ServiceProvider as BaseServiceProvider;
 
 class ServiceProvider extends BaseServiceProvider
@@ -12,7 +13,55 @@ class ServiceProvider extends BaseServiceProvider
 
     public function boot(): void
     {
-        $this->resolve()->prependMiddleware($this->middleware);
+        $this->publishConfig();
+
+        $this->registerMiddleware($this->middlewareGroups());
+    }
+
+    public function register(): void
+    {
+        $this->registerConfig();
+    }
+
+    protected function registerMiddleware(array $groups): void
+    {
+        $this->toAll($groups)
+            ? $this->resolve()->prependMiddleware($this->middleware)
+            : $this->prependMiddlewareToGroups($this->middleware, $groups);
+    }
+
+    protected function prependMiddlewareToGroups(string $middleware, array $groups): void
+    {
+        foreach ($groups as $group) {
+            $this->resolve()->prependMiddlewareToGroup($group, $middleware);
+        }
+    }
+
+    protected function toAll(array $groups): bool
+    {
+        return empty($groups);
+    }
+
+    protected function middlewareGroups(): array
+    {
+        return array_filter(Arr::wrap(
+            $this->app['config']->get('http.response.json')
+        ));
+    }
+
+    protected function publishConfig(): void
+    {
+        $this->publishes([
+            __DIR__ . '/../config/http.php' => $this->app->configPath('http.php'),
+        ]);
+    }
+
+    protected function registerConfig(): void
+    {
+        $this->mergeConfigFrom(
+            __DIR__ . '/../config/http.php',
+            'http'
+        );
     }
 
     protected function resolve(): Kernel
diff --git a/tests/Middlewares/SetHeaderMiddlewareTest.php b/tests/Middlewares/AllTest.php
similarity index 97%
rename from tests/Middlewares/SetHeaderMiddlewareTest.php
rename to tests/Middlewares/AllTest.php
index a31f29b..a4a2f9e 100644
--- a/tests/Middlewares/SetHeaderMiddlewareTest.php
+++ b/tests/Middlewares/AllTest.php
@@ -5,26 +5,26 @@
 use Lmc\HttpConstants\Header;
 use Tests\TestCase;
 
-class SetHeaderMiddlewareTest extends TestCase
+class AllTest extends TestCase
 {
-    public function testWeb(): void
+    public function testApi(): void
     {
         $this
-            ->get('web')
+            ->get('api')
             ->assertSuccessful()
             ->assertHeader(Header::ACCEPT, 'application/json')
             ->assertJsonStructure(['data'])
-            ->assertJson(['data' => 'Hello, Web!']);
+            ->assertJson(['data' => 'Hello, Api!']);
     }
 
-    public function testApi(): void
+    public function testWeb(): void
     {
         $this
-            ->get('api')
+            ->get('web')
             ->assertSuccessful()
             ->assertHeader(Header::ACCEPT, 'application/json')
             ->assertJsonStructure(['data'])
-            ->assertJson(['data' => 'Hello, Api!']);
+            ->assertJson(['data' => 'Hello, Web!']);
     }
 
     public function testCustom(): void
diff --git a/tests/Middlewares/ApiAndWebTest.php b/tests/Middlewares/ApiAndWebTest.php
new file mode 100644
index 0000000..4df071c
--- /dev/null
+++ b/tests/Middlewares/ApiAndWebTest.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace Tests\Middlewares;
+
+use Lmc\HttpConstants\Header;
+use Tests\TestCase;
+
+class ApiAndWebTest extends TestCase
+{
+    protected $groups = ['api', 'web'];
+
+    public function testApi(): void
+    {
+        $this
+            ->get('api')
+            ->assertSuccessful()
+            ->assertHeader(Header::ACCEPT, 'application/json')
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Api!']);
+    }
+
+    public function testWeb(): void
+    {
+        $this
+            ->get('web')
+            ->assertSuccessful()
+            ->assertHeader(Header::ACCEPT, 'application/json')
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Web!']);
+    }
+
+    public function testCustom(): void
+    {
+        $this
+            ->get('custom')
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Custom!']);
+    }
+
+    public function testCustomHeader(): void
+    {
+        $this
+            ->get('custom', [Header::ACCEPT => 'application/xml'])
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Custom!']);
+    }
+
+    public function testAsterisk(): void
+    {
+        $this
+            ->get('custom', [Header::ACCEPT => '*/*'])
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Custom!']);
+    }
+}
diff --git a/tests/Middlewares/OnlyApiTest.php b/tests/Middlewares/OnlyApiTest.php
new file mode 100644
index 0000000..9237592
--- /dev/null
+++ b/tests/Middlewares/OnlyApiTest.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace Tests\Middlewares;
+
+use Lmc\HttpConstants\Header;
+use Tests\TestCase;
+
+class OnlyApiTest extends TestCase
+{
+    protected $groups = 'api';
+
+    public function testApi(): void
+    {
+        $this
+            ->get('api')
+            ->assertSuccessful()
+            ->assertHeader(Header::ACCEPT, 'application/json')
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Api!']);
+    }
+
+    public function testWeb(): void
+    {
+        $this
+            ->get('web')
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Web!']);
+    }
+
+    public function testCustom(): void
+    {
+        $this
+            ->get('custom')
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Custom!']);
+    }
+
+    public function testCustomHeader(): void
+    {
+        $this
+            ->get('custom', [Header::ACCEPT => 'application/xml'])
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Custom!']);
+    }
+
+    public function testAsterisk(): void
+    {
+        $this
+            ->get('custom', [Header::ACCEPT => '*/*'])
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Custom!']);
+    }
+}
diff --git a/tests/Middlewares/OnlyWebTest.php b/tests/Middlewares/OnlyWebTest.php
new file mode 100644
index 0000000..815312b
--- /dev/null
+++ b/tests/Middlewares/OnlyWebTest.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace Tests\Middlewares;
+
+use Lmc\HttpConstants\Header;
+use Tests\TestCase;
+
+class OnlyWebTest extends TestCase
+{
+    protected $groups = 'web';
+
+    public function testApi(): void
+    {
+        $this
+            ->get('api')
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Api!']);
+    }
+
+    public function testWeb(): void
+    {
+        $this
+            ->get('web')
+            ->assertSuccessful()
+            ->assertHeader(Header::ACCEPT, 'application/json')
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Web!']);
+    }
+
+    public function testCustom(): void
+    {
+        $this
+            ->get('custom')
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Custom!']);
+    }
+
+    public function testCustomHeader(): void
+    {
+        $this
+            ->get('custom', [Header::ACCEPT => 'application/xml'])
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Custom!']);
+    }
+
+    public function testAsterisk(): void
+    {
+        $this
+            ->get('custom', [Header::ACCEPT => '*/*'])
+            ->assertSuccessful()
+            ->assertHeaderMissing(Header::ACCEPT)
+            ->assertJsonStructure(['data'])
+            ->assertJson(['data' => 'Hello, Custom!']);
+    }
+}
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 8e1b606..7018e1a 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -3,10 +3,14 @@
 namespace Tests;
 
 use DragonCode\LaravelJsonResponse\ServiceProvider;
+use Illuminate\Contracts\Config\Repository;
+use Illuminate\Routing\Router;
 use Orchestra\Testbench\TestCase as BaseTestCase;
 
 abstract class TestCase extends BaseTestCase
 {
+    protected $groups;
+
     protected function getPackageProviders($app): array
     {
         return [ServiceProvider::class];
@@ -14,14 +18,12 @@ protected function getPackageProviders($app): array
 
     protected function getEnvironmentSetUp($app)
     {
-        $this->setRoutes($app);
+        $this->setRoutes($app['router']);
+        $this->setConfig($app['config']);
     }
 
-    protected function setRoutes($app): void
+    protected function setRoutes(Router $router): void
     {
-        /** @var \Illuminate\Routing\RouteRegistrar $router */
-        $router = $app['router'];
-
         $router->get('web', function () {
             return ['data' => 'Hello, Web!'];
         })->middleware('web');
@@ -34,4 +36,9 @@ protected function setRoutes($app): void
             return ['data' => 'Hello, Custom!'];
         });
     }
+
+    protected function setConfig(Repository $config): void
+    {
+        $config->set('http.response.json', $this->groups);
+    }
 }