diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index b37113453..5a8211b6f 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -150,6 +150,7 @@ virinci <github.com/virinci>
 snowtimeglass <snowtimeglass@gmail.com>
 Ben Olson <github.com/grepgrok>
 Akash Reddy <github.com/akashreddy03>
+Lucio Sauer <watermanpaint@posteo.net>
 
 ********************
 
diff --git a/LICENSE b/LICENSE
index 1ff8ff499..d508b698b 100644
--- a/LICENSE
+++ b/LICENSE
@@ -6,9 +6,9 @@ The following included source code items use a license other than AGPL3:
 
 In the pylib folder:
 
- * The SuperMemo importer: GPL3.
+ * The SuperMemo importer: GPL3 and 0BSD.
  * The Pauker importer: BSD-3.
- * statsbg.py: CC BY-SA 3.0.
+ * statsbg.py: CC BY 4.0.
 
 In the qt folder:
 
diff --git a/pylib/anki/importing/supermemo_xml.py b/pylib/anki/importing/supermemo_xml.py
index ecd5f2c07..3e9127877 100644
--- a/pylib/anki/importing/supermemo_xml.py
+++ b/pylib/anki/importing/supermemo_xml.py
@@ -22,6 +22,7 @@ class SmartDict(dict):
     """
     See http://www.peterbe.com/plog/SmartDict
     Copyright 2005, Peter Bengtsson, peter@fry-it.com
+    0BSD
 
     A smart dict can be instantiated either from a pythonic dict
     or an instance object (eg. SQL recordsets) but it ensures that you can
diff --git a/pylib/anki/statsbg.py b/pylib/anki/statsbg.py
index 6c67601d5..552dfb5a9 100644
--- a/pylib/anki/statsbg.py
+++ b/pylib/anki/statsbg.py
@@ -1,6 +1,6 @@
 # pylint: disable=invalid-name
 
-# from subtlepatterns.com; CC BY-SA 3.0.
+# from subtlepatterns.com; CC BY 4.0.
 # by Daniel Beaton
 # https://www.toptal.com/designers/subtlepatterns/fancy-deboss/
 bg = """\