diff --git a/src/IO/Writer/GZipCompressedStringWriter.php b/src/IO/Writer/GZipCompressedStringWriter.php
index 9c87412..a3f569d 100644
--- a/src/IO/Writer/GZipCompressedStringWriter.php
+++ b/src/IO/Writer/GZipCompressedStringWriter.php
@@ -6,6 +6,6 @@ class GZipCompressedStringWriter extends StringWriter
 {
     public function getStringData(): string
     {
-        return gzencode(parent::getStringData(), ZLIB_ENCODING_DEFLATE);
+        return gzencode(parent::getStringData());
     }
 }