diff --git a/.phpunit.result.cache b/.phpunit.result.cache
index 086d622..8a8a179 100644
--- a/.phpunit.result.cache
+++ b/.phpunit.result.cache
@@ -1 +1 @@
-{"version":1,"defects":{"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testTable":3,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testImages":4,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testSections":3,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testTemplate":4,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testRenderXml":3,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testPatchXml":4},"times":{"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testTable":0.057,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testXmlToString":0.029,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testGetDocx":0.02,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testGetXml":0.025,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testPatchXml":0.021,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testRenderXml":0.083,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testRender":0.065,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testLineBreak":0.056,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testCyrillic":0.074,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testForLoop":0.057,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testImages":0.124,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testSections":0.09,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testTemplate":0.111}}
\ No newline at end of file
+{"version":1,"defects":{"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testTable":3,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testImages":4,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testSections":3,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testTemplate":4,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testRenderXml":3,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testPatchXml":4,"Tests\\PhpDocxTemplateTest::testRenderXml":3},"times":{"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testTable":0.057,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testXmlToString":0.029,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testGetDocx":0.02,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testGetXml":0.025,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testPatchXml":0.021,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testRenderXml":0.083,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testRender":0.065,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testLineBreak":0.056,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testCyrillic":0.074,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testForLoop":0.057,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testImages":0.124,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testSections":0.09,"Doctrine\\Tests\\DBAL\\Query\\PhpDocxTemplateTest::testTemplate":0.111,"Tests\\PhpDocxTemplateTest::testRenderXml":0.045}}
\ No newline at end of file
diff --git a/src/PhpDocxTemplate.php b/src/PhpDocxTemplate.php
index c87bb82..9bbde55 100644
--- a/src/PhpDocxTemplate.php
+++ b/src/PhpDocxTemplate.php
@@ -3,6 +3,7 @@
 namespace PhpDocxTemplate;
 
 use DOMDocument;
+use Twig\Extension\ExtensionInterface;
 use Twig\Loader\ArrayLoader;
 use Twig\Environment;
 use PhpDocxTemplate\Twig\Impl\{
@@ -33,6 +34,8 @@ class PhpDocxTemplate
     private $picToReplace;
     private $picMap;
 
+    private $twigExtensions = [];
+
     /**
      * Construct an instance of PhpDocxTemplate
      *
@@ -426,6 +429,16 @@ private function cleanTags(array $matches): string
         );
     }
 
+    /**
+     * Добавить пользовательское расширение
+     *
+     * @param ExtensionInterface $ext
+     */
+    public function addTwigExtensions(ExtensionInterface $ext): void
+    {
+        $this->twigExtensions[] = $ext;
+    }
+
     /**
      * Render xml
      *
@@ -442,6 +455,12 @@ private function renderXml(string $srcXml, array $context): string
             'index' => $srcXml,
         ]));
 
+        /**
+         * Пользовательские расширения
+         */
+        foreach ($this->twigExtensions as $ext) {
+            $template->addExtension($ext);
+        }
 
         $ext = new ImageExtension();
         $ext->setRenderer(
diff --git a/tests/PhpDocxTemplateTest.php b/tests/PhpDocxTemplateTest.php
index 0cdd9fc..9b62ba6 100644
--- a/tests/PhpDocxTemplateTest.php
+++ b/tests/PhpDocxTemplateTest.php
@@ -1,14 +1,12 @@
 <?php
 
-namespace Doctrine\Tests\DBAL\Query;
+namespace Tests;
 
 use PHPUnit\Framework\TestCase;
 use DOMDocument;
 use PhpDocxTemplate\PhpDocxTemplate;
 use PhpDocxTemplate\DocxDocument;
 use ZipArchive;
-use Twig\Loader\ArrayLoader;
-use Twig\Environment;
 
 class PhpDocxTemplateTest extends TestCase
 {
@@ -165,6 +163,7 @@ public function testPatchXml(): void
     public function testRenderXml(): void
     {
         $reporter = new PhpDocxTemplate(self::TEMPLATE1);
+
         $this->assertEquals(
             $reporter->buildXml(["object" => "world"]),
             "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n" .
@@ -205,7 +204,7 @@ public function testRenderXml(): void
             "<w:sectPr w:rsidR=\"0090657C\" w:rsidRPr=\"00FA3F61\"><w:pgSz w:w=\"11906\" w:h=\"16838\"/>" .
             "<w:pgMar w:top=\"1134\" w:right=\"850\" w:bottom=\"1134\" w:left=\"1701\" w:header=\"708\" " .
             "w:footer=\"708\" w:gutter=\"0\"/><w:cols w:space=\"708\"/><w:docGrid w:linePitch=\"360\"/>" .
-            "</w:sectPr></w:body></w:document>\n"
+            "</w:sectPr></w:body></w:document>"
         );
         $reporter->close();
     }