diff --git a/README.rst b/README.rst
index 163cfbccde687d8ea4e9c3f4bc4c9641a2fc626f..f933de3235474602edc22d9552a69c2ac414c37e 100644
--- a/README.rst
+++ b/README.rst
@@ -16,9 +16,13 @@ Licence
 
 ::
 
+  Copyright © 2019–2020 Tom Teichler <tom.teichler@teckids.org>
   Copyright © 2019 Dominik George <dominik.george@teckids.org>
   Copyright © 2019 mirabilos <thorsten.glaser@teckids.org>
-  Copyright © 2019 Tom Teichler <tom.teichler@teckids.org>
+  Copyright © 2020 Julian Leucker <leuckeju@katharineum.de>
+  Copyright © 2020 Jonathan Weth <wethjo@katharineum.de>
+  Copyright © 2020 Hangzhi Yu <yuha@katharineum.de>
+
 
   Licenced under the EUPL, version 1.2 or later
 
diff --git a/aleksis/apps/alsijil/apps.py b/aleksis/apps/alsijil/apps.py
index 25aa203003ea54063a0e27fd531314e1ebb03b9b..47a7aa392860cf9c4b577efbad090b734943d4b1 100644
--- a/aleksis/apps/alsijil/apps.py
+++ b/aleksis/apps/alsijil/apps.py
@@ -10,7 +10,10 @@ class AlsijilConfig(AppConfig):
     }
     licence = "EUPL-1.2+"
     copyright_info = (
+        ([2019, 2020], "Tom Teichler", "tom.teichler@teckids.org"),
         ([2019], "Dominik George", "dominik.george@teckids.org"),
         ([2019], "mirabilos", "thorsten.glaser@teckids.org"),
-        ([2019], "Tom Teichler", "tom.teichler@teckids.org"),
+        ([2020], "Julian Leucker", "leuckeju@katharineum.de"),
+        ([2020], "Jonathan Weth", "wethjo@katharineum.de"),
+        ([2020], "Hangzhi Yu", "yuha@katharineum.de"),
     )