diff --git a/.travis.yml b/.travis.yml
index d0442950..5abc15d9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,8 @@ php:
   - 5.5
   - 5.6
   - 7.0
+  - 7.1
+  - 7.2
 
 matrix:
   include:
@@ -17,8 +19,8 @@ matrix:
 before_script:
   - pecl install xmldiff
   - echo "xdebug.max_nesting_level=1000" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
-  - if [[ $TRAVIS_PHP_VERSION = '5.6' ]]; then PHPUNIT_FLAGS="--coverage-clover=coverage.clover"; else PHPUNIT_FLAGS=""; fi
-  - if [[ $TRAVIS_PHP_VERSION != '5.6' ]]; then phpenv config-rm xdebug.ini; fi  
+  - if [[ $TRAVIS_PHP_VERSION = '7.0' ]]; then PHPUNIT_FLAGS="--coverage-clover=coverage.clover"; else PHPUNIT_FLAGS=""; fi
+  - if [[ $TRAVIS_PHP_VERSION != '7.0' ]]; then phpenv config-rm xdebug.ini; fi
   - composer self-update
   - composer update $COMPOSER_FLAGS
 
@@ -28,5 +30,5 @@ script:
 
 after_script:
   - wget https://scrutinizer-ci.com/ocular.phar
-  - if [[ $TRAVIS_PHP_VERSION = '5.6' ]] ; then php ocular.phar code-coverage:upload --format=php-clover coverage.clover; fi
+  - if [[ $TRAVIS_PHP_VERSION = '7.0' ]] ; then php ocular.phar code-coverage:upload --format=php-clover coverage.clover; fi
   
diff --git a/composer.json b/composer.json
index dde33e71..b1e920e5 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,8 @@
   "type": "library",
   "authors": [
     {
-      "name": "Asmir Mustafic"
+      "name": "Asmir Mustafic",
+      "email" : "goetas@gmail.com"
     }
   ],
   "keywords": [
@@ -18,13 +19,11 @@
   "license": "MIT",
   "require": {
     "php": "^5.5|^7.0",
-    "symfony/console": "^2.7|^3.0",
-    "symfony/dependency-injection": "^2.2|^3.0",
-    "symfony/config": "^2.2|^3.0",
-    "symfony/yaml": "^2.1|^3.0",
-
-    "goetas-webservices/xsd-reader": "^0.2",
-    "goetas-webservices/soap-reader": "^0.3",
+    "symfony/console": "^2.7|^3.0|^4.0",
+    "symfony/dependency-injection": "^2.2|^3.0|^4.0",
+    "symfony/yaml": "^2.1|^3.0|^4.0",
+    "symfony/config": "^2.2|^3.0|^4.0",
+    "goetas-webservices/xsd-reader": "^0.2|^0.3.1",
     "doctrine/inflector": "^1.0",
     "zendframework/zend-code": "~2.3",
 
diff --git a/src/Resources/config/services.xml b/src/Resources/config/services.xml
index 9209ecdc..e6f105ec 100644
--- a/src/Resources/config/services.xml
+++ b/src/Resources/config/services.xml
@@ -10,46 +10,46 @@
 
         <service id="goetas_webservices.xsd2php.schema_reader" public="true" class="GoetasWebservices\XML\XSDReader\SchemaReader" />
 
-        <service synthetic="true" public="false" id="goetas_webservices.xsd2php.naming_convention"/>
+        <service synthetic="true" public="true" id="goetas_webservices.xsd2php.naming_convention"/>
         <service synthetic="true" id="logger"/>
 
-        <service id="goetas_webservices.xsd2php.converter.php" class="GoetasWebservices\Xsd\XsdToPhp\Php\PhpConverter">
+        <service id="goetas_webservices.xsd2php.converter.php" class="GoetasWebservices\Xsd\XsdToPhp\Php\PhpConverter" public="true">
             <argument id="goetas_webservices.xsd2php.naming_convention" type="service"/>
             <call method="setLogger">
                 <argument type="service" id="logger"></argument>
             </call>
         </service>
 
-        <service id="goetas_webservices.xsd2php.converter.jms" class="GoetasWebservices\Xsd\XsdToPhp\Jms\YamlConverter">
+        <service id="goetas_webservices.xsd2php.converter.jms" class="GoetasWebservices\Xsd\XsdToPhp\Jms\YamlConverter"  public="true">
             <argument id="goetas_webservices.xsd2php.naming_convention" type="service"/>
             <call method="setLogger">
                 <argument type="service" id="logger"></argument>
             </call>
         </service>
 
-        <service synthetic="true" id="goetas_webservices.xsd2php.path_generator.php"/>
-        <service synthetic="true" id="goetas_webservices.xsd2php.path_generator.jms"/>
+        <service synthetic="true" id="goetas_webservices.xsd2php.path_generator.php" public="true"/>
+        <service synthetic="true" id="goetas_webservices.xsd2php.path_generator.jms" public="true"/>
 
         <service id="goetas_webservices.xsd2php.path_generator.php.psr4" public="false"
                  class="GoetasWebservices\Xsd\XsdToPhp\Php\PathGenerator\Psr4PathGenerator"></service>
         <service id="goetas_webservices.xsd2php.path_generator.jms.psr4" public="false"
                  class="GoetasWebservices\Xsd\XsdToPhp\Jms\PathGenerator\Psr4PathGenerator"></service>
 
-        <service id="goetas_webservices.xsd2php.writer.php" class="GoetasWebservices\Xsd\XsdToPhp\Writer\PHPWriter">
+        <service id="goetas_webservices.xsd2php.writer.php" class="GoetasWebservices\Xsd\XsdToPhp\Writer\PHPWriter" public="true">
             <argument id="goetas_webservices.xsd2php.class_writer.php" type="service"/>
             <argument id="goetas_webservices.xsd2php.php.class_generator" type="service"/>
             <argument id="logger" type="service"/>
         </service>
 
-        <service id="goetas_webservices.xsd2php.class_writer.php" class="GoetasWebservices\Xsd\XsdToPhp\Writer\PHPClassWriter">
+        <service id="goetas_webservices.xsd2php.class_writer.php" class="GoetasWebservices\Xsd\XsdToPhp\Writer\PHPClassWriter" public="true">
             <argument id="goetas_webservices.xsd2php.path_generator.php" type="service"/>
             <argument id="logger" type="service"/>
         </service>
 
         <service id="goetas_webservices.xsd2php.php.class_generator"
-                 class="GoetasWebservices\Xsd\XsdToPhp\Php\ClassGenerator"></service>
+                 class="GoetasWebservices\Xsd\XsdToPhp\Php\ClassGenerator" public="true"></service>
 
-        <service id="goetas_webservices.xsd2php.writer.jms" class="GoetasWebservices\Xsd\XsdToPhp\Writer\JMSWriter">
+        <service id="goetas_webservices.xsd2php.writer.jms" class="GoetasWebservices\Xsd\XsdToPhp\Writer\JMSWriter" public="true">
             <argument id="goetas_webservices.xsd2php.path_generator.jms" type="service"/>
             <argument id="logger" type="service"/>
         </service>