diff --git a/src/Bridge/Symfony/Bundle/DependencyInjection/Configuration.php b/src/Bridge/Symfony/Bundle/DependencyInjection/Configuration.php
index 193a029227b..83fecafc9cc 100644
--- a/src/Bridge/Symfony/Bundle/DependencyInjection/Configuration.php
+++ b/src/Bridge/Symfony/Bundle/DependencyInjection/Configuration.php
@@ -90,16 +90,17 @@ public function getConfigTreeBuilder()
                     ->addDefaultsIfNotSet()
                     ->children()
                              ->arrayNode('api_keys')
-                             ->addDefaultsIfNotSet()
-                                ->children()
-                                ->scalarNode('name')
-                                    ->info('The name of the header or query parameter containing the api key.')
+                                 ->prototype('array')
+                                    ->children()
+                                    ->scalarNode('name')
+                                        ->info('The name of the header or query parameter containing the api key.')
+                                    ->end()
+                                    ->enumNode('type')
+                                        ->info('Whether the api key should be a query parameter or a header.')
+                                        ->values(['query', 'header'])
+                                    ->end()
                                 ->end()
-                                ->enumNode('type')
-                                    ->info('Whether the api key should be a query parameter or a header.')
-                                    ->values(['query', 'header'])
-                                ->end()
-                            ->end()
+                             ->end()
                         ->end()
                     ->end()
                 ->end()
diff --git a/tests/Bridge/Symfony/Bundle/DependencyInjection/ConfigurationTest.php b/tests/Bridge/Symfony/Bundle/DependencyInjection/ConfigurationTest.php
index 257e03b2f5c..0d14622171c 100644
--- a/tests/Bridge/Symfony/Bundle/DependencyInjection/ConfigurationTest.php
+++ b/tests/Bridge/Symfony/Bundle/DependencyInjection/ConfigurationTest.php
@@ -225,12 +225,12 @@ public function testApiKeysConfig()
         $config = $this->processor->processConfiguration($this->configuration, [
             'api_platform' => [
                 'swagger' => [
-                    'api_keys' => $exampleConfig,
+                    'api_keys' => [$exampleConfig],
                ],
             ],
         ]);
 
         $this->assertTrue(isset($config['swagger']['api_keys']));
-        $this->assertSame($exampleConfig, $config['swagger']['api_keys']);
+        $this->assertSame($exampleConfig, $config['swagger']['api_keys'][0]);
     }
 }