diff --git a/CHANGELOG.md b/CHANGELOG.md
index 180814a0..04bce8e5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Support for chart fill color - @CrazyBite [#158](https://github.com/PHPOffice/PhpSpreadsheet/pull/158)
 - Support for read Hyperlink for xml - @GreatHumorist [#223](https://github.com/PHPOffice/PhpSpreadsheet/pull/223)
 - Support for cell value validation according to data validation rules - @SailorMax [#257](https://github.com/PHPOffice/PhpSpreadsheet/pull/257)
+- Support for custom implementation, or configuration, of PDF libraries - @SailorMax [#266](https://github.com/PHPOffice/PhpSpreadsheet/pull/266)
 
 ### Changed
 
diff --git a/docs/topics/reading-and-writing-to-file.md b/docs/topics/reading-and-writing-to-file.md
index 0e642120..e04d6377 100644
--- a/docs/topics/reading-and-writing-to-file.md
+++ b/docs/topics/reading-and-writing-to-file.md
@@ -779,6 +779,32 @@ Or you can instantiate directly the writer of your choice like so:
 $writer = \PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf($spreadsheet);
 ```
 
+#### Custom implementation or configuration
+
+If you need a custom implementation, or custom configuration, of a supported
+PDF library. You can extends the PDF library, and the PDF writer like so:
+
+``` php
+class My_Custom_TCPDF extends TCPDF
+{
+	// ...
+}
+
+class My_Custom_TCPDF_Writer extends \PhpOffice\PhpSpreadsheet\Writer\Pdf\Tcpdf
+{
+	protected function createExternalWriterInstance($orientation, $unit, $paperSize)
+	{
+		$instance = new My_Custom_TCPDF($orientation, $unit, $paperSize);
+		
+		// more configuration of $instance
+		
+		return $instance;
+	}
+}
+
+\PhpOffice\PhpSpreadsheet\IOFactory::registerWriter('Pdf', MY_TCPDF_WRITER::class);
+```
+
 #### Writing a spreadsheet
 
 Once you have identified the Renderer that you wish to use for PDF
diff --git a/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php b/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php
index 4db6c261..3c3044d7 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php
@@ -7,6 +7,16 @@ use PhpOffice\PhpSpreadsheet\Writer\Pdf;
 
 class Dompdf extends Pdf
 {
+    /**
+     * Gets the implementation of external PDF library that should be used.
+     *
+     * @return \Dompdf\Dompdf implementation
+     */
+    protected function createExternalWriterInstance()
+    {
+        return new \Dompdf\Dompdf();
+    }
+
     /**
      * Save Spreadsheet to file.
      *
@@ -50,7 +60,7 @@ class Dompdf extends Pdf
         }
 
         //  Create PDF
-        $pdf = new \Dompdf\Dompdf();
+        $pdf = $this->createExternalWriterInstance();
         $pdf->setPaper(strtolower($paperSize), $orientation);
 
         $pdf->loadHtml(
diff --git a/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php b/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php
index 7a037052..ad0964db 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php
@@ -8,6 +8,18 @@ use PhpOffice\PhpSpreadsheet\Writer\Pdf;
 
 class Mpdf extends Pdf
 {
+    /**
+     * Gets the implementation of external PDF library that should be used.
+     *
+     * @param array $config Configuration array
+     *
+     * @return \Mpdf\Mpdf implementation
+     */
+    protected function createExternalWriterInstance($config)
+    {
+        return new \Mpdf\Mpdf($config);
+    }
+
     /**
      * Save Spreadsheet to file.
      *
@@ -54,7 +66,7 @@ class Mpdf extends Pdf
 
         //  Create PDF
         $config = ['tempDir' => $this->tempDir];
-        $pdf = new \Mpdf\Mpdf($config);
+        $pdf = $this->createExternalWriterInstance($config);
         $ortmp = $orientation;
         $pdf->_setPageSize(strtoupper($paperSize), $ortmp);
         $pdf->DefOrientation = $orientation;
diff --git a/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php b/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php
index 00b6436e..13320504 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php
@@ -7,6 +7,20 @@ use PhpOffice\PhpSpreadsheet\Writer\Pdf;
 
 class Tcpdf extends Pdf
 {
+    /**
+     * Gets the implementation of external PDF library that should be used.
+     *
+     * @param string $orientation Page orientation
+     * @param string $unit Unit measure
+     * @param string $paperSize Paper size
+     *
+     * @return TCPDF implementation
+     */
+    protected function createExternalWriterInstance($orientation, $unit, $paperSize)
+    {
+        return new \TCPDF($orientation, $unit, $paperSize);
+    }
+
     /**
      * Save Spreadsheet to file.
      *
@@ -50,7 +64,7 @@ class Tcpdf extends Pdf
         }
 
         //  Create PDF
-        $pdf = new \TCPDF($orientation, 'pt', $paperSize);
+        $pdf = $this->createExternalWriterInstance($orientation, 'pt', $paperSize);
         $pdf->setFontSubsetting(false);
         //    Set margins, converting inches to points (using 72 dpi)
         $pdf->SetMargins($printMargins->getLeft() * 72, $printMargins->getTop() * 72, $printMargins->getRight() * 72);