diff --git a/CONTRIBUTORS b/CONTRIBUTORS
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -2,7 +2,13 @@ List of contributors to Kallithea projec
 
     Thomas De Schampheleire <thomas.de_schampheleire@nokia.com> 2014-2020
     Mads Kiilerich <mads@kiilerich.com> 2016-2020
+    Asterios Dimitriou <steve@pci.gr> 2016-2017 2020
+    Private <adamantine.sword@gmail.com> 2019-2020
     Dennis Fink <dennis.fink@c3l.lu> 2020
+    Étienne Gilli <etienne@gilli.io> 2020
+    J. Lavoie <j.lavoie@net-c.ca> 2020
+    robertus <robertuss12@gmail.com> 2020
+    Ross Thomas <ross@lns-nevasoft.com> 2020
     Andrej Shadura <andrew@shadura.me> 2012 2014-2017 2019
     Étienne Gilli <etienne.gilli@gmail.com> 2015-2017 2019
     Allan Nordhøy <epost@anotheragency.no> 2017-2019
@@ -17,7 +23,6 @@ List of contributors to Kallithea projec
     Mateusz Mendel <mendelm9@gmail.com> 2019
     Nathan <bonnemainsnathan@gmail.com> 2019
     Oleksandr Shtalinberg <o.shtalinberg@gmail.com> 2019
-    Private <adamantine.sword@gmail.com> 2019
     THANOS SIOURDAKIS <siourdakisthanos@gmail.com> 2019
     Wolfgang Scherer <wolfgang.scherer@gmx.de> 2019
     Христо Станев <hstanev@gmail.com> 2019
@@ -34,7 +39,6 @@ List of contributors to Kallithea projec
     Unity Technologies 2012-2017
     Søren Løvborg <sorenl@unity3d.com> 2015-2017
     Sam Jaques <sam.jaques@me.com> 2015 2017
-    Asterios Dimitriou <steve@pci.gr> 2016-2017
     Alessandro Molina <alessandro.molina@axant.it> 2017
     Anton Schur <tonich.sh@gmail.com> 2017
     Ching-Chen Mao <mao@lins.fju.edu.tw> 2017
diff --git a/kallithea/templates/about.html b/kallithea/templates/about.html
--- a/kallithea/templates/about.html
+++ b/kallithea/templates/about.html
@@ -26,9 +26,14 @@
 
   <li>Copyright &copy; 2012&ndash;2020, Mads Kiilerich</li>
   <li>Copyright &copy; 2014&ndash;2020, Thomas De Schampheleire</li>
+  <li>Copyright &copy; 2015&ndash;2017, 2019&ndash;2020, Étienne Gilli</li>
+  <li>Copyright &copy; 2016&ndash;2017, 2020, Asterios Dimitriou</li>
+  <li>Copyright &copy; 2019&ndash;2020, Private</li>
   <li>Copyright &copy; 2020, Dennis Fink</li>
+  <li>Copyright &copy; 2020, J. Lavoie</li>
+  <li>Copyright &copy; 2020, robertus</li>
+  <li>Copyright &copy; 2020, Ross Thomas</li>
   <li>Copyright &copy; 2012, 2014&ndash;2017, 2019, Andrej Shadura</li>
-  <li>Copyright &copy; 2015&ndash;2017, 2019, Étienne Gilli</li>
   <li>Copyright &copy; 2017&ndash;2019, Allan Nordhøy</li>
   <li>Copyright &copy; 2018&ndash;2019, ssantos</li>
   <li>Copyright &copy; 2019, Adi Kriegisch</li>
@@ -41,7 +46,6 @@
   <li>Copyright &copy; 2019, Mateusz Mendel</li>
   <li>Copyright &copy; 2019, Nathan</li>
   <li>Copyright &copy; 2019, Oleksandr Shtalinberg</li>
-  <li>Copyright &copy; 2019, Private</li>
   <li>Copyright &copy; 2019, THANOS SIOURDAKIS</li>
   <li>Copyright &copy; 2019, Wolfgang Scherer</li>
   <li>Copyright &copy; 2019, Христо Станев</li>
@@ -57,7 +61,6 @@
   <li>Copyright &copy; 2012&ndash;2017, Unity Technologies</li>
   <li>Copyright &copy; 2015&ndash;2017, Søren Løvborg</li>
   <li>Copyright &copy; 2015, 2017, Sam Jaques</li>
-  <li>Copyright &copy; 2016&ndash;2017, Asterios Dimitriou</li>
   <li>Copyright &copy; 2017, Alessandro Molina</li>
   <li>Copyright &copy; 2017, Anton Schur</li>
   <li>Copyright &copy; 2017, Ching-Chen Mao</li>