diff --git a/debian/changelog b/debian/changelog
index 866e0d2..87991c3 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+minetest-mod-mobs-redo (20181016-2) UNRELEASED; urgency=medium
+
+  * Refer to common license file for CC0-1.0.
+
+ -- Debian Janitor <janitor@jelmer.uk>  Sat, 11 Sep 2021 02:08:45 -0000
+
 minetest-mod-mobs-redo (20181016-1) unstable; urgency=medium
 
   * Initial release. (Closes: #911212)
diff --git a/debian/copyright b/debian/copyright
index c21ef2e..4c82a74 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -8,7 +8,7 @@
 
 Files: sounds/mobs_swing.ogg
 Copyright: 2008 qubodup
-License: CC0
+License: CC0-1.0
 
 Files: sounds/mobs_spell.ogg
 Copyright: littlerobotsoundfactory
@@ -39,13 +39,16 @@
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
 
-License: CC0
+License: CC0-1.0
  To the extent possible under law, the author(s) have dedicated all copyright
  and related and neighboring rights to this software to the public domain
  worldwide. This software is distributed without any warranty.
  .
  You should have received a copy of the CC0 Public Domain Dedication along with
  this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
+ .
+ On Debian systems, the full text of the CC0 1.0 Universal license can be found
+ in the file `/usr/share/common-licenses/CC0-1.0'.
 
 License: CC-BY-3.0
  http://creativecommons.org/licenses/by/3.0/
@@ -331,4 +334,4 @@
     includes additional rights not granted under this License, such
     additional rights are deemed to be included in the License; this
     License is not intended to restrict the license of any rights under
-    applicable law.
\ No newline at end of file
+    applicable law.