diff --git a/src/Generator.php b/src/Generator.php
index afb7be7..915bcb4 100644
--- a/src/Generator.php
+++ b/src/Generator.php
@@ -167,7 +167,7 @@ private function dumpSitemap(Sitemapindex|Urlset $sitemap, bool $deflate): void
         }
 
         /** @var string $content */
-        $content = $deflate ? gzdeflate($sitemap->toXml()) : $sitemap->toXml();
+        $content = ($deflate ? gzencode($sitemap->toXml()) : $sitemap->toXml());
         $this->filesystem->dumpFile($this->buildDir.str_replace($this->generateUrl(''), '', $path), $content);
     }
 }
diff --git a/tests/functional/site/fixtures/sitemap-article-0.xml.gz b/tests/functional/site/fixtures/sitemap-article-0.xml.gz
index ec1bbc9..d6119a0 100644
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diff --git a/tests/functional/site/fixtures/sitemap-articles-0.xml.gz b/tests/functional/site/fixtures/sitemap-articles-0.xml.gz
index adfa655..7d4b6b4 100644
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diff --git a/tests/functional/site/fixtures/sitemap-file-0.xml.gz b/tests/functional/site/fixtures/sitemap-file-0.xml.gz
index 88d4c8f..7c85fe3 100644
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diff --git a/tests/functional/site/fixtures/sitemap-homepage-0.xml.gz b/tests/functional/site/fixtures/sitemap-homepage-0.xml.gz
index e992643..235b292 100644
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diff --git a/tests/functional/site/fixtures/sitemap-index-0.xml.gz b/tests/functional/site/fixtures/sitemap-index-0.xml.gz
index 6cfe80f..2655858 100644
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diff --git a/tests/functional/site/fixtures/sitemap-product-0.xml.gz b/tests/functional/site/fixtures/sitemap-product-0.xml.gz
index d017319..41c57be 100644
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diff --git a/tests/functional/site/fixtures/sitemap-product_with_route_default-0.xml.gz b/tests/functional/site/fixtures/sitemap-product_with_route_default-0.xml.gz
index 9935ea5..e870252 100644
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diff --git a/tests/functional/site/fixtures/sitemap.xml.gz b/tests/functional/site/fixtures/sitemap.xml.gz
index 746706d..66662fa 100644
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