diff --git a/src/MDConcLicenses.php b/src/MDConcLicenses.php
index 20834e2..9278d70 100644
--- a/src/MDConcLicenses.php
+++ b/src/MDConcLicenses.php
@@ -14,6 +14,9 @@ final class MDConcLicenses {
     const LICENSES_LIST = [
         "CC 0" => "CC0",
         "CC_0" => "CC0",
+        "CC0 1.0" => "CC0",
+        "CC 0 1.0" => "CC0",
+        "CC_0 1.0" => "CC0",
         "https://creativecommons.org/publicdomain/zero/1.0/deed.de" => "CC0",
 
         "CC_BY" => "CC BY",