diff --git a/README.md b/README.md
index 4bae76a..32e008d 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,6 @@ It can also open links to userpages of Bookwyrm users and it can scan ISBN codes
 This application works on: Android 6 and above.
 
 And if you want to know, I am `@StoryDragon@wyrms.de` on BookWyrm.
+
+For the ISBN-scanning I use the library zxing-android-embedded.
+The barcode icon that is added for instances that do not have ISBN-scanning by default comes from the Remix Icon project.