diff --git a/backend/src/SignDocument/Services/DigitalSignatureService.php b/backend/src/SignDocument/Services/DigitalSignatureService.php
index 2a46955..6c9468b 100644
--- a/backend/src/SignDocument/Services/DigitalSignatureService.php
+++ b/backend/src/SignDocument/Services/DigitalSignatureService.php
@@ -33,7 +33,7 @@ class DigitalSignatureService
             exec(sprintf('cp %s %s.pdf', $document->tempFileName, $document->tempFileName));
             exec(sprintf('cryptcp -sign -detached -der %s', $document->tempFileName . '.pdf'));
 
-            $response = base64_encode(file_get_contents($document->tempFileName . '.sgn'));
+            $response = base64_encode(file_get_contents($document->tempFileName . '.pdf.sgn'));
 
             $this->removeExistingDocumentService->removeExistingDocument($document);