diff --git a/CHANGELOG.md b/CHANGELOG.md
index afa3c15..d0cb9e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 All notable changes to this project will be documented in this file.   
 This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.4.3] - 2024-08-01
+- Fixed: possible exception in DompdfCreator
+
 ## [0.4.2] - 2024-08-01
 - Changed: widen dependency requirements
 
diff --git a/PdfCreator/Concrete/DompdfCreator.php b/PdfCreator/Concrete/DompdfCreator.php
index 2dd1a52..5c3382c 100644
--- a/PdfCreator/Concrete/DompdfCreator.php
+++ b/PdfCreator/Concrete/DompdfCreator.php
@@ -172,7 +172,7 @@ public function supports(): array
     {
         $support = [];
 
-        if (class_exists('setasign\Fpdi\Tcpdf\Fpdi')) {
+        if (class_exists(\TCPDF::class) && class_exists(Fpdi::class)) {
             $support[] = static::SUPPORT_MASTERTEMPLATE;
         }
 
diff --git a/README.md b/README.md
index 0c3e858..a5a9f4b 100644
--- a/README.md
+++ b/README.md
@@ -42,13 +42,13 @@ We recommend installing this library with composer:
     composer require heimrichhannot/pdf-creator
 
 You also need to install the pdf library, you want to use this bundle with:
-- Dompdf:
-  - `"dompdf/dompdf": "^1.0"`
+- Dompdf (version 1 to 3 are supported):
+  - `"dompdf/dompdf": "^3.0"`
   - if you want to use master templates in Dompdf, you also need FPDI and TCPDF:    
     - `"tecnickcom/tcpdf": "^6.3"`
     - `"setasign/fpdi": "^2.3"`
-- mPDF
-  - `"mpdf/mpdf": "^8.0"` (version ^7.0 also supported)
+- mPDF (version 7 and 8 are supported):
+  - `"mpdf/mpdf": "^8.0"`
 - TCPDF
   - `"tecnickcom/tcpdf": "^6.3"`
   - if you want to use master templates in TCPDF, you also need FPDI: