diff --git a/oeffi/res/values/strings.xml b/oeffi/res/values/strings.xml
index 16efa50..f5b535a 100644
--- a/oeffi/res/values/strings.xml
+++ b/oeffi/res/values/strings.xml
@@ -48,7 +48,7 @@
     <!-- preferences about -->
     <string name="about_title">About Offi</string>
     <string name="about_copyright_title">Copyright</string>
-    <string name="about_copyright_summary">© 2010-2019, the Öffi developers</string>
+    <string name="about_copyright_summary">© 2010-2020, the Öffi developers</string>
     <string name="about_license_title">License</string>
     <string name="about_source_title">Source code</string>
     <string name="about_changelog_title">View Changelog</string>