diff --git a/Changelog.txt b/Changelog.txt
index ee624c6320..cd2db52b43 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -23,6 +23,32 @@
 # - title by author
 # }}}
 
+{{{ 5.21.0 2021-06-11
+
+:: new features
+
+- Driver for the new Kobo Ellipsa
+
+- [1930958] Content server: When editing metadata for fields that take multiple values, make it easier to remove individual values by simply tapping a button
+
+- [1930900] Browser viewer: Make current color scheme setting propagate to all devices automatically when using user accounts
+
+- E-book viewer: Image popup: Show the image resolution in the popup window's titlebar
+
+:: bug fixes
+
+- [1930922] HTML Input: Fix handling of @import rules in stylesheets nested more than one level deep
+
+- [1930912] Fix viewer search context menu to clear searches not clearing search settings
+
+- E-book viewer image popup: Fix full screen button in incorrect state when starting in full screen
+
+:: improved recipes
+- Associated Press
+- The Hindu
+
+}}}
+
 {{{ 5.20.0 2021-06-04
 
 :: new features
diff --git a/src/calibre/constants.py b/src/calibre/constants.py
index 72775bb4ca..d945cac855 100644
--- a/src/calibre/constants.py
+++ b/src/calibre/constants.py
@@ -5,7 +5,7 @@ from polyglot.builtins import map, unicode_type, environ_item, hasenv, getenv
 import sys, locale, codecs, os, collections
 
 __appname__   = 'calibre'
-numeric_version = (5, 20, 0)
+numeric_version = (5, 21, 0)
 __version__   = '.'.join(map(unicode_type, numeric_version))
 git_version   = None
 __author__    = "Kovid Goyal <kovid@kovidgoyal.net>"