diff --git a/src/MDConcLicenses.php b/src/MDConcLicenses.php
index d8db138..20834e2 100644
--- a/src/MDConcLicenses.php
+++ b/src/MDConcLicenses.php
@@ -54,6 +54,9 @@ final class MDConcLicenses {
         "https://www.deutsche-digitale-bibliothek.de/content/lizenzen/rv-fz" => "RR-F",
         "https://www.europeana.eu/rights/rr-f/" => "RR-F",
         "Rechte vorbehalten - Freier Zugang" => "RR-F",
+        "http://rightsstatements.org/vocab/InC/1.0/" => "RR-F",
+        "http://rightsstatements.org/page/InC/1.0/" => "RR-F",
+        "https://rightsstatements.org/page/InC/1.0/" => "RR-F",
         "Alle Rechte vorbehalten" => "RR-F",
         "Alle Rechte vorbehalten - Urhebererechtlich geschütztes Werk" => "RR-F",
         "IN COPYRIGHT" => "RR-P",