diff --git a/src/Digipost/Signature/Client/ASiCe/Signature/CreateSignature.php b/src/Digipost/Signature/Client/ASiCe/Signature/CreateSignature.php
index 4a3ffce..6dc5d26 100644
--- a/src/Digipost/Signature/Client/ASiCe/Signature/CreateSignature.php
+++ b/src/Digipost/Signature/Client/ASiCe/Signature/CreateSignature.php
@@ -81,7 +81,7 @@ public function createSignature(
     $attachedFiles,
     KeyStoreConfig $keyStoreConfig
   ) {
-    $xmlSignatureFactory = $this->getSignatureFactory();
+    //$xmlSignatureFactory = $this->getSignatureFactory();
     //    $signatureMethod = $this->getSignatureMethod($xmlSignatureFactory);
     //    $signContext = $xmlSignatureFactory->getXMLSignatureContext();
 
@@ -233,10 +233,15 @@ private function getSignatureFactory() {
    * @throws SchemaException
    */
   protected function validateXml(\DOMDocument $dom) {
-    libxml_use_internal_errors(TRUE);
+    libxml_use_internal_errors(FALSE);
 
     $xsd = SignatureApiSchemas::ASICE_AND_XADES_SCHEMA()->getXSD();
-    $dom->schemaValidateSource($xsd, Marshalling::LIBXML_OPTIONS);
+    try {
+      $dom->schemaValidateSource($xsd, Marshalling::LIBXML_OPTIONS);
+    } catch (\Exception $e) {
+      print $e->getMessage();
+    }
+    print "OK";
     if ($errors = $this->getXmlValidationErrors()) {
       $error = $this->formatXmlValidationErrors();
 
diff --git a/src/Digipost/Signature/Client/ASiCe/Signature/CreateXAdESProperties.php b/src/Digipost/Signature/Client/ASiCe/Signature/CreateXAdESProperties.php
index 93fe1d6..fc153ce 100644
--- a/src/Digipost/Signature/Client/ASiCe/Signature/CreateXAdESProperties.php
+++ b/src/Digipost/Signature/Client/ASiCe/Signature/CreateXAdESProperties.php
@@ -10,7 +10,6 @@
 use Digipost\Signature\Client\Core\Internal\Security\X509Certificate;
 use Digipost\Signature\Client\Core\Internal\XML\Marshalling;
 use DOMDocument as Document;
-use RobRichards\XMLSecLibs\XMLSecurityDSig;
 use Digipost\Signature\Client\Core\Internal\Security\Constants as C;
 use Digipost\Signature\Client\Core\Internal\Security\Signature;
 
@@ -38,7 +37,7 @@ function __staticInit() {
    */
   function __construct(\DateTime $clock) {
     $this->sha1DigestMethod = new DigestMethod();
-    $this->sha1DigestMethod->setAlgorithm(XMLSecurityDSig::SHA1);
+    $this->sha1DigestMethod->setAlgorithm(C::DIGEST_SHA1);
     $this->clock = $clock;
   }
 
diff --git a/src/Digipost/Signature/DigipostSignatureBundle.php b/src/Digipost/Signature/DigipostSignatureBundle.php
index b9ed7e7..7183c0b 100644
--- a/src/Digipost/Signature/DigipostSignatureBundle.php
+++ b/src/Digipost/Signature/DigipostSignatureBundle.php
@@ -17,6 +17,8 @@ class DigipostSignatureBundle extends Bundle {
   public function build(ContainerBuilder $container) {
     parent::build($container);
 
+    define('DIGIPOST_SIGNATURE_ROOT_DIR', $container->getParameter('kernel.project_dir'));
+
     $serializer_dir = __DIR__ . '/Resources/config/serializer';
     $serializer_php_dir = __DIR__ . '/API/XML';
     $container->setParameter('digipost_signature.serializer_config_dir', $serializer_dir);
@@ -25,7 +27,7 @@ public function build(ContainerBuilder $container) {
     try {
       $container->registerExtension(new Xsd2PhpExtension());
       $container->addCompilerPass(new Xsd2PhpLoaderPass());
-    } catch (\Exception $e) {
+    } catch (\Error $e) {
       $container->registerExtension(new Xsd2PhpPolyfillExtension());
     }
 
diff --git a/src/Digipost/Signature/Loader/KeyStoreFileLoader.php b/src/Digipost/Signature/Loader/KeyStoreFileLoader.php
index 57ee208..5cd21e0 100644
--- a/src/Digipost/Signature/Loader/KeyStoreFileLoader.php
+++ b/src/Digipost/Signature/Loader/KeyStoreFileLoader.php
@@ -23,7 +23,7 @@ public static function loader(
   ) {
     $kernel = $container->get('kernel');
     $path = $filename;
-    if ($filename[0] === '@') {
+    if (!empty($filename) && $filename[0] === '@') {
       $path = $kernel->locateResource($filename);
     }
     if (!file_exists($path)) {
diff --git a/src/Digipost/Signature/XSD/SignatureApiSchemas.php b/src/Digipost/Signature/XSD/SignatureApiSchemas.php
index ff50102..bbab12d 100644
--- a/src/Digipost/Signature/XSD/SignatureApiSchemas.php
+++ b/src/Digipost/Signature/XSD/SignatureApiSchemas.php
@@ -91,9 +91,10 @@ public function __construct($value) {
       $this->filename = $value;
     }
 
-//    if (is_array($value)) {
-//      $this->filename = 'xsd://' . $this->getKey();
-//    }
+    if ($this->filename && $dir = $this->resolveVendorDir()) {
+      $dir .= '/digipost/signature-api-specification/schema/xsd';
+      $this->filename = $dir . $this->filename;
+    }
   }
 
   private static function create($value) {
@@ -104,6 +105,31 @@ public function getValue() {
     return $this;
   }
 
+  private function resolveVendorDir() {
+    if ($file = self::findFileInParents('vendor/autoload.php')) {
+      return dirname($file);
+    }
+    return FALSE;
+  }
+
+  private static function findFileInParents(
+    string $filename,
+    $startDir = __DIR__,
+    $maxIterations = 20
+  ) {
+    $path = $startDir;
+    do {
+      $path = realpath($path . implode(DIRECTORY_SEPARATOR, ['', '..', '']));
+      $filePath = $path . DIRECTORY_SEPARATOR . $filename;
+      $fileFound = file_exists($filePath);
+    } while (--$maxIterations > 0 && !file_exists($filePath) && $path !== DIRECTORY_SEPARATOR);
+
+    if (!$fileFound) {
+      return FALSE;
+    }
+    return $filePath;
+  }
+
   /**
    * @return \GoetasWebservices\XML\XSDReader\Schema\Schema
    */
@@ -115,7 +141,7 @@ public function getSchema() {
         //$schema->addSchema($reader->readFile($fileName));
       //}
       $schema = $reader->readFile($this->filename);
-    } catch (SchemaException $e) {
+    } catch (\Exception $e) {
       throw new \RuntimeException("An error occoured during merging of schemas", 0, $e);
     }
 
@@ -142,7 +168,11 @@ public function getXSD() {
 
     $imports = array_map(function($schema) {
       /** @var SignatureApiSchemas $schema */
-      $ns = $schema->getSchema()->getTargetNamespace();
+      try {
+        $ns = $schema->getSchema()->getTargetNamespace();
+      } catch (\Exception $e) {
+        return '';
+      }
       return '<xsd:import namespace="' . $ns . '" schemaLocation="' . $schema->filename . '"/>' . "\n";
     }, $values);