diff --git a/dexes/literature.bib b/dexes/literature.bib
index 6a050a9..2dcc3b3 100644
--- a/dexes/literature.bib
+++ b/dexes/literature.bib
@@ -175,8 +175,8 @@
 
 @misc{bib:chillerlan-php-qrcode,
   author       = {Eugen Rochko},
-  howpublished = "\url{https://www.npmjs.com/package/qrcode}",
-  title        = {{QR code/2d barcode generator}},
+  howpublished = "\url{https://github.com/chillerlan/php-qrcode}",
+  title        = {{A QR code generator and reader with a user friendly API. PHP 7.4+}},
   year         = {2022},
   note         = {Zugriff: Januar 2023}
 }
diff --git a/main.pdf b/main.pdf
index f09bcad..a6bb7de 100644
Binary files a/main.pdf and b/main.pdf differ