diff --git a/DependencyInjection/GoogleExtension.php b/DependencyInjection/GoogleExtension.php
index e23b125..0065705 100755
--- a/DependencyInjection/GoogleExtension.php
+++ b/DependencyInjection/GoogleExtension.php
@@ -17,22 +17,9 @@ public function load(array $configs, ContainerBuilder $container)
         $configuration = new Configuration;
         $config        = $this->processConfiguration($configuration, $configs);
 
-        $modules = [
-            'analytics' => [],
-            'maps'      => [],
-        ];
-
-        foreach ($configs as $singleConfig) {
-            foreach (array_keys($modules) as $module) {
-                if (array_key_exists($module, $singleConfig)) {
-                    $modules[$module][] = isset($singleConfig[$module]) ? $singleConfig[$module] : [];
-                }
-            }
-        }
-
         $this->adwordsLoad($config['adwords'], $container);
-        $this->analyticsLoad($modules['analytics'], $container);
-        $this->mapsLoad($modules['maps'], $container);
+        $this->analyticsLoad($config['analytics'], $container);
+        $this->mapsLoad($config['maps'], $container);
     }
 
     private function adwordsLoad(array $config, ContainerBuilder $container): void
@@ -43,43 +30,25 @@ private function adwordsLoad(array $config, ContainerBuilder $container): void
         $container->setParameter('google.adwords.conversions', $config['conversions']);
     }
 
-    private function analyticsLoad(array $configs, ContainerBuilder $container): void
+    private function analyticsLoad(array $config, ContainerBuilder $container): void
     {
         $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('analytics.xml');
 
-        $trackers = [];
-        foreach ($configs as $config) {
-            $trackers = array_merge($trackers, isset($config['trackers']) ? $config['trackers'] : []);
-            if (isset($config['dashboard'])) {
-                $container->setParameter('google.analytics.dashboard', $config['dashboard']);
-            }
-            if (isset($config['whitelist'])) {
-                $container->setParameter('google.analytics.whitelist', $config['whitelist']);
-            }
-            if (isset($config['js_source_https'])) {
-                $container->setParameter('google.analytics.js_source_https', $config['js_source_https']);
-            }
-            if (isset($config['js_source_http'])) {
-                $container->setParameter('google.analytics.js_source_http', $config['js_source_http']);
-            }
-            if (isset($config['js_source_endpoint'])) {
-                $container->setParameter('google.analytics.js_source_endpoint', $config['js_source_endpoint']);
-            }
-        }
-        $container->setParameter('google.analytics.trackers', $trackers);
+        $container->setParameter('google.analytics.dashboard', $config['dashboard']);
+        $container->setParameter('google.analytics.whitelist', $config['whitelist']);
+        $container->setParameter('google.analytics.js_source_https', $config['js_source_https']);
+        $container->setParameter('google.analytics.js_source_http', $config['js_source_http']);
+        $container->setParameter('google.analytics.js_source_endpoint', $config['js_source_endpoint']);
+        $container->setParameter('google.analytics.trackers', $config['trackers']);
     }
 
-    private function mapsLoad(array $configs, ContainerBuilder $container): void
+    private function mapsLoad(array $config, ContainerBuilder $container): void
     {
         $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('maps.xml');
 
-        foreach ($configs as $config) {
-            if (isset($config['config'])) {
-                $container->setParameter('google.maps.config', $config['config']);
-            }
-        }
+        $container->setParameter('google.maps.config', $config['config']);
     }
 
     public function getAlias()
diff --git a/Resources/config/adwords.xml b/Resources/config/adwords.xml
index c3d682e..5f5b084 100644
--- a/Resources/config/adwords.xml
+++ b/Resources/config/adwords.xml
@@ -3,7 +3,6 @@
 	xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
 
 	<parameters>
-		<parameter key="google.adwords.conversions" type="collection" />
 		<parameter key="google.adwords.class">AntiMattr\GoogleBundle\Adwords</parameter>
 		<parameter key="google.adwords.helper.class">AntiMattr\GoogleBundle\Helper\AdwordsHelper</parameter>
 		<parameter key="google.adwords.extension.class">AntiMattr\GoogleBundle\Extension\AdwordsExtension</parameter>
diff --git a/Resources/config/analytics.xml b/Resources/config/analytics.xml
index bb8eeb1..2cae196 100644
--- a/Resources/config/analytics.xml
+++ b/Resources/config/analytics.xml
@@ -2,15 +2,6 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
 
-    <parameters>
-        <parameter key="google.analytics.dashboard" type="collection" />
-        <parameter key="google.analytics.trackers" type="collection" />
-        <parameter key="google.analytics.whitelist" type="collection" />
-        <parameter key="google.analytics.js_source_https">https://</parameter>
-        <parameter key="google.analytics.js_source_http">http://</parameter>
-        <parameter key="google.analytics.js_source_endpoint">stats.g.doubleclick.net/dc.js</parameter>
-    </parameters>
-
     <services>
         <service id="google.analytics" class="AntiMattr\GoogleBundle\Analytics" public="true">
             <argument type="service" id="service_container" />
diff --git a/Resources/config/maps.xml b/Resources/config/maps.xml
index 3638589..b6c29ff 100644
--- a/Resources/config/maps.xml
+++ b/Resources/config/maps.xml
@@ -2,10 +2,6 @@
 	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">
 
-	<parameters>
-		<parameter key="google.maps.config" type="collection" />
-	</parameters>
-
 	<services>
 		<service id="google.maps" class="AntiMattr\GoogleBundle\MapsManager" public="true">
 			<argument>%google.maps.config%</argument>
diff --git a/Tests/Configuration/ConfigurationTest.php b/Tests/Configuration/ConfigurationTest.php
index 27bb387..8dc1f90 100644
--- a/Tests/Configuration/ConfigurationTest.php
+++ b/Tests/Configuration/ConfigurationTest.php
@@ -5,8 +5,10 @@
 namespace AntiMattr\GoogleBundle\Tests\Configuration;
 
 use AntiMattr\GoogleBundle\DependencyInjection\Configuration;
+use AntiMattr\GoogleBundle\DependencyInjection\GoogleExtension;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Config\Definition\Processor;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
 
 class ConfigurationTest extends TestCase
 {
@@ -19,6 +21,100 @@ public function testEmptyConfig(array $configs, array $expectedConfig): void
         self::assertEquals($expectedConfig, $computedConfig);
     }
 
+    public function testDefaultParametersSet(): void
+    {
+        $container = new ContainerBuilder;
+        (new GoogleExtension)->load([], $container);
+
+        self::assertTrue($container->hasParameter('google.adwords.conversions'));
+        self::assertEquals([], $container->getParameter('google.analytics.dashboard'));
+        self::assertEquals([], $container->getParameter('google.analytics.trackers'));
+        self::assertEquals([], $container->getParameter('google.analytics.whitelist'));
+        self::assertSame('https://', $container->getParameter('google.analytics.js_source_https'));
+        self::assertSame('http://', $container->getParameter('google.analytics.js_source_http'));
+        self::assertSame(
+            'stats.g.doubleclick.net/dc.js',
+            $container->getParameter('google.analytics.js_source_endpoint')
+        );
+        self::assertSame([], $container->getParameter('google.maps.config'));
+    }
+
+    public function testOverridenParametersSet(): void
+    {
+        $container = new ContainerBuilder;
+        $configs   = [];
+        $configs[] = [
+            'adwords' => [
+                'conversions' => [
+                    'conversion1' => [
+                        'id' => 'conversion1id',
+                    ],
+                ],
+            ],
+            'maps'    => [
+                'config' => null,
+            ],
+        ];
+        $configs[] = [
+            'analytics' => [
+                'dashboard'          => [
+                    'api_key' => 'test',
+                ],
+                'whitelist'          => [],
+                'js_source_https'    => 'secure://',
+                'js_source_http'     => 'insecure://',
+                'js_source_endpoint' => 'some_host',
+                'trackers'           => [
+                    'tracker1' => [
+                        'accountId' => 'UA-123',
+                    ],
+                ],
+            ],
+        ];
+        $configs[] = [
+            'maps' => [
+                'config' => [
+                    'map1key' => [
+                        'id' => 'map1id',
+                    ],
+                ],
+            ],
+        ];
+
+        (new GoogleExtension)->load($configs, $container);
+
+        self::assertEquals(
+            [
+                'conversion1' => [
+                    'id'       => 'conversion1id',
+                    'label'    => null,
+                    'value'    => null,
+                    'format'   => null,
+                    'color'    => null,
+                    'language' => null,
+                ],
+            ],
+            $container->getParameter('google.adwords.conversions')
+        );
+        self::assertEquals(
+            ['api_key' => 'test'],
+            $container->getParameter('google.analytics.dashboard')
+        );
+        self::assertEquals(
+            ['tracker1' => ['accountId' => 'UA-123']],
+            $container->getParameter('google.analytics.trackers')
+        );
+        self::assertEquals([], $container->getParameter('google.analytics.whitelist'));
+        self::assertSame('secure://', $container->getParameter('google.analytics.js_source_https'));
+        self::assertSame('insecure://', $container->getParameter('google.analytics.js_source_http'));
+        self::assertSame('some_host', $container->getParameter('google.analytics.js_source_endpoint'));
+        self::assertSame(
+            ['map1key' => ['id' => 'map1id']],
+            $container->getParameter('google.maps.config')
+        );
+    }
+
+
     public function provideConfigs(): iterable
     {
         yield 'empty' => [