diff --git a/src/PaymentPart/Output/AbstractOutput.php b/src/PaymentPart/Output/AbstractOutput.php
index 928e0667..4a23642f 100644
--- a/src/PaymentPart/Output/AbstractOutput.php
+++ b/src/PaymentPart/Output/AbstractOutput.php
@@ -34,7 +34,7 @@ public function getLanguage(): ?string
         return $this->language;
     }
 
-    public function setPrintable(bool $printable): self
+    public function setPrintable(bool $printable): static
     {
         $this->printable = $printable;
 
@@ -46,7 +46,7 @@ public function isPrintable(): bool
         return $this->printable;
     }
 
-    public function setQrCodeImageFormat(string $fileExtension): self
+    public function setQrCodeImageFormat(string $fileExtension): static
     {
         $this->qrCodeImageFormat = $fileExtension;
 
@@ -164,8 +164,6 @@ protected function getFurtherInformationElements(): array
 
     protected function getQrCode(): QrCode
     {
-        $qrCode = $this->qrBill->getQrCode($this->getQrCodeImageFormat());
-
-        return $qrCode;
+        return $this->qrBill->getQrCode($this->getQrCodeImageFormat());
     }
 }
diff --git a/src/PaymentPart/Output/FpdfOutput/FpdfOutput.php b/src/PaymentPart/Output/FpdfOutput/FpdfOutput.php
index 61d1b77b..4da32770 100644
--- a/src/PaymentPart/Output/FpdfOutput/FpdfOutput.php
+++ b/src/PaymentPart/Output/FpdfOutput/FpdfOutput.php
@@ -82,7 +82,7 @@ public function getPaymentPart(): void
         $this->addFurtherInformationContent();
     }
 
-    public function setQrCodeImageFormat(string $fileExtension): AbstractOutput
+    public function setQrCodeImageFormat(string $fileExtension): static
     {
         if (QrCode::FILE_FORMAT_SVG === $fileExtension) {
             throw new InvalidFpdfImageFormat('SVG images are not allowed by FPDF.');