diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
index 4cb47c4a..90baad58 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDInvoiceImporter.java
@@ -126,8 +126,7 @@ public class ZUGFeRDInvoiceImporter {
 		if (Arrays.equals(pad, pdfSignature)) { // we have a pdf
 
 
-			try {
-				PDDocument doc = Loader.loadPDF(IOUtils.toByteArray(pdfStream));
+			try(PDDocument doc = Loader.loadPDF(IOUtils.toByteArray(pdfStream))) {
 				// PDDocumentInformation info = doc.getDocumentInformation();
 				final PDDocumentNameDictionary names = new PDDocumentNameDictionary(doc.getDocumentCatalog());
 				//start