diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3da20f2..1548392 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,8 +9,8 @@ jobs:
         strategy:
             fail-fast: true
             matrix:
-                php: [7.3, 7.4, 8.0]
-                laravel: [6.*, 7.*, 8.*]
+                php: [7.3, 7.4, 8.0, 8.1]
+                laravel: [6.*, 7.*, 8.*, 9.*]
                 dependency-version: [prefer-lowest, prefer-stable]
 
         name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.dependency-version }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0f60de8..ba33564 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,9 @@ All notable changes to `easy-pdf` will be documented in this file.
 
 ## [Unreleased]
 
+## 2.3.0 - 2022-02-08
+- Add support for Laravel 9.
+
 ## 2.2.0 - 2022-01-14
 - `$pdf` variable changed to public variable in `EasyPdf.php`
 - SVG support added to `setImage` method.
diff --git a/composer.json b/composer.json
index e619387..f30bfd7 100755
--- a/composer.json
+++ b/composer.json
@@ -21,15 +21,15 @@
         }
     ],
     "require": {
-        "php": "^7.3 || ^8.0",
-        "illuminate/support": "6.11.0|^7.0|^8.0",
+        "php": "^7.3|^8.0|^8.1",
+        "illuminate/support": "6.11.0|^7.0|^8.0|^9.0",
         "setasign/fpdi-tcpdf": "^2.2",
         "tecnickcom/tcpdf": "^6.3",
         "ext-fileinfo": "*"
     },
     "require-dev": {
         "mockery/mockery": "^1.3",
-        "orchestra/testbench": "^4.0|^5.0|^6.0",
+        "orchestra/testbench": "^4.0|^5.0|^6.0|^7.0",
         "phpunit/phpunit": "^9.0"
     },
     "autoload": {
diff --git a/src/Merge.php b/src/Merge.php
index 7313394..de46fc7 100644
--- a/src/Merge.php
+++ b/src/Merge.php
@@ -11,6 +11,12 @@ class Merge extends BasePdf
      */
     protected $files;
 
+    protected $watermark;
+    protected $w_x;
+    protected $w_y;
+    protected $w_width;
+    protected $w_height;
+
     /**
      * Merge constructor.
      *
@@ -23,6 +29,27 @@ public function __construct(array $files)
         $this->files = $files;
     }
 
+    /**
+     * Add watermark to each page.
+     *
+     * @param $watermark
+     * @param $x
+     * @param $y
+     * @param $width
+     * @param $height
+     * @return $this
+     */
+    public function addWatermark($watermark, $x = null, $y = null, $width = 0, $height = 0)
+    {
+        $this->watermark = $watermark;
+        $this->w_x = $x;
+        $this->w_y = $y;
+        $this->w_width = $width;
+        $this->w_height = $height;
+
+        return $this;
+    }
+
     /**
      * Merge pdf files into one pdf.
      *
@@ -41,6 +68,9 @@ public function render()
                 $this->pdf->AddPage();
                 $importedPage = $this->pdf->ImportPage($page);
                 $this->pdf->useTemplate($importedPage);
+                if ($this->watermark) {
+                    $this->pdf->Image($this->watermark, $this->w_x, $this->w_y, $this->w_width, $this->w_height);
+                }
             }
         }
 
diff --git a/tests/MergeTest.php b/tests/MergeTest.php
index c2f5501..57aef21 100644
--- a/tests/MergeTest.php
+++ b/tests/MergeTest.php
@@ -8,12 +8,15 @@
 
 class MergeTest extends TestCase
 {
+    protected $file;
     protected $files;
 
     protected function setUp(): void
     {
         parent::setUp();
 
+        $this->file = __DIR__.'/files/file.pdf';
+
         $this->files = [
             __DIR__.'/files/file.pdf',
             __DIR__.'/files/anotherFile.pdf',
@@ -31,4 +34,19 @@ public function it_can_merge_multiple_files_into_one_file()
 
         $this->assertSame('application/pdf; charset=binary', $buffer);
     }
+
+    /** @test */
+    public function it_can_add_watermark_into_the_file()
+    {
+        $easyPdf = new EasyPdf();
+        $pdf = $easyPdf->reset()
+            ->merge([$this->file])
+            ->addWatermark(__DIR__.'/files/watermark.png')
+            ->content();
+
+        $finfo = new finfo(1040);
+        $buffer = $finfo->buffer($pdf);
+
+        $this->assertSame('application/pdf; charset=binary', $buffer);
+    }
 }
diff --git a/tests/files/watermark.png b/tests/files/watermark.png
new file mode 100644
index 0000000..d976199
Binary files /dev/null and b/tests/files/watermark.png differ