--- a/www/CHANGES.rst	Wed Sep 01 10:38:44 2021 +0300
+++ b/www/CHANGES.rst	Wed Sep 01 10:47:27 2021 +0300
@@ -55,7 +55,12 @@
       0.16          n/a
    ======= ============
 
-v0.19, 2021-09-01
+v0.21, 2021-xx-xx
+=================
+
+TBD
+
+v0.20, 2021-09-01
 =================
 
 * Added most of the chemical elements.