diff --git a/help/C/index.docbook b/help/C/index.docbook
index e66d292..196c1fc 100644
--- a/help/C/index.docbook
+++ b/help/C/index.docbook
@@ -9,7 +9,7 @@
      <title>MATE Terminal Manual</title>
 
      <copyright> 
-        <year>2019</year> 
+        <year>2015-2020</year> 
         <holder>MATE Documentation Project</holder>
      </copyright>
      <copyright>
@@ -1085,4 +1085,4 @@
         </variablelist> 
      </section> 
   </section> 
-</article>
\ No newline at end of file
+</article>
diff --git a/src/terminal-window.c b/src/terminal-window.c
index 1e2e478..0ba62b7 100644
--- a/src/terminal-window.c
+++ b/src/terminal-window.c
@@ -4471,7 +4471,7 @@ help_about_callback (GtkAction *action,
                                           "Copyright \xc2\xa9 2006 Guilherme de S. Pastore\n"
                                           "Copyright \xc2\xa9 2007–2010 Christian Persch\n"
                                           "Copyright \xc2\xa9 2011 Perberos\n"
-                                          "Copyright \xc2\xa9 2012-2019 MATE developers"),
+                                          "Copyright \xc2\xa9 2012-2020 MATE developers"),
                            "comments", _("A terminal emulator for the MATE desktop"),
                            "authors", array_strv,
                            "artists", artists,