diff --git a/src/MDConcLicenses.php b/src/MDConcLicenses.php
index c317277..5be9884 100644
--- a/src/MDConcLicenses.php
+++ b/src/MDConcLicenses.php
@@ -44,6 +44,7 @@ final class MDConcLicenses implements MDImporterConcordanceListInterface {
         "https://creativecommons.org/licenses/by/4.0/" => "CC BY",
         "https://creativecommons.org/licenses/by/4.0/de" => "CC BY",
         "https://creativecommons.org/licenses/by/4.0/deed.de" => "CC BY",
+        "Namensnennung 4.0. International (CC BY 4.0)" => "CC BY",
 
         "CC BY SA"  => "CC BY-SA",
         "CC BY-SA-" => "CC BY-SA",
diff --git a/src/MDConcMarkingType.php b/src/MDConcMarkingType.php
index b100094..04232fb 100644
--- a/src/MDConcMarkingType.php
+++ b/src/MDConcMarkingType.php
@@ -410,6 +410,7 @@ final class MDConcMarkingType implements MDImporterConcordanceListInterface {
         "Signatur mit Datierung (gedruckt)" => "signature",
         "Signatur mit Datierung (gemalt)" => "signature",
         "Signatur mit Datierung (gezeichnet)" => "signature",
+        "Signatur mit Datierung (gestempelt)" => "signature",
 
         # Watermark
         "Wasserzeichen" => "watermark",