diff --git a/composer.json b/composer.json
index 757395f0..ded59312 100644
--- a/composer.json
+++ b/composer.json
@@ -11,15 +11,12 @@
         "gitonomy/gitlib": "^1.0",
         "nuvoleweb/robo-config": "^0.2.1",
         "jakeasmith/http_build_url": "^1.0.1",
-        "symfony/yaml": ">3.1.0"
+        "symfony/yaml": "^3.4||4"
     },
     "require-dev": {
         "openeuropa/code-review": "~1.0.0-beta3",
         "phpunit/phpunit": "~5.5||~6.0"
     },
-    "_readme": [
-        "We need require a version of 'symfony/yaml' higher then '3.1' since versions before 3.1.0 don't have dumper 'DUMP' constants available and 3.1.0 breaks permissions setup in tests."
-    ],
     "autoload": {
         "psr-4": {
             "OpenEuropa\\TaskRunner\\": "./src/"
diff --git a/src/Commands/AbstractDrupalCommands.php b/src/Commands/AbstractDrupalCommands.php
index cbd590fe..b565673f 100644
--- a/src/Commands/AbstractDrupalCommands.php
+++ b/src/Commands/AbstractDrupalCommands.php
@@ -308,7 +308,7 @@ public function drushSetup(array $options = [
     ])
     {
         $config = $this->getConfig();
-        $yaml = Yaml::dump($config->get('drupal.drush'));
+        $yaml = $this->dumpYaml($config->get('drupal.drush'));
 
         return $this->collectionBuilder()->addTaskList([
             $this->taskWriteConfiguration($options['root'].'/sites/default/drushrc.php', $config)->setConfigKey('drupal.drush'),
@@ -340,14 +340,13 @@ public function servicesSetup(array $options = [
     {
         // Read given parameters.
         $service_parameters['parameters'] = $this->getConfig()->get('drupal.service_parameters', []);
-        $dumper = new Dumper(2);
-        $yaml = $dumper->dump($service_parameters, PHP_INT_MAX, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE);
+        $yaml = $this->dumpYaml($service_parameters);
 
         // Set the destination file.
         $services_destination_file = $options['root'] . '/sites/' . $options['sites-subdir'] . '/services.yml';
 
         $collection = [];
-        if (true === (bool) $options['force'] || !file_exists($services_destination_file)) {
+        if ($options['force'] || !file_exists($services_destination_file)) {
             $collection[] = $this->taskWriteToFile($services_destination_file)->append(false)->text($yaml);
         }
 
@@ -476,4 +475,16 @@ protected function processPrePostInstallCommands(array &$commands, array $tokens
             }
         }
     }
+
+    /**
+     * Dump Yaml into file using same format as in Drupal.
+     *
+     * @param $yaml
+     * @return string
+     */
+    protected function dumpYaml($yaml)
+    {
+        $dumper = new Dumper(2);
+        return $dumper->dump($yaml, PHP_INT_MAX, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE);
+    }
 }
diff --git a/tests/Commands/DrupalCommandsTest.php b/tests/Commands/DrupalCommandsTest.php
index df271395..0452b85e 100644
--- a/tests/Commands/DrupalCommandsTest.php
+++ b/tests/Commands/DrupalCommandsTest.php
@@ -87,14 +87,11 @@ public function testServicesSetup(array $configs, array $expected)
         $services_destination_dir = $this->getSandboxRoot() . '/sites/' . $sites_subdir;
         $services_destination_file = $services_destination_dir . '/services.yml';
 
-        // Process information for force option.
-        $force = '';
-        if (isset($configs['force'])) {
+        $force = isset($configs['force'])? ' --force' : '';
+
+        if (isset($configs['services_file_content'])) {
             mkdir($services_destination_dir, 0777, true);
-            file_put_contents($services_destination_file, 'parameters: false');
-            if ($configs['force']) {
-                $force = ' --force';
-            }
+            file_put_contents($services_destination_file, $configs['services_file_content']);
         }
 
         // Run the command.
diff --git a/tests/fixtures/commands/drupal-services-setup.yml b/tests/fixtures/commands/drupal-services-setup.yml
index 3dd53ab0..4416b786 100644
--- a/tests/fixtures/commands/drupal-services-setup.yml
+++ b/tests/fixtures/commands/drupal-services-setup.yml
@@ -13,6 +13,7 @@
             foo: bar
 - config:
     force: true
+    services_file_content: "parameters: false"
     runner: |
         my_settings:
           foo: bar
@@ -26,7 +27,7 @@
           settings:
             foo: bar
 - config:
-    force: false
+    services_file_content: "parameters: false"
     runner: |
         my_settings:
           foo: bar