--- a/text/en/CHANGES
+++ b/text/en/CHANGES
@@ -1,4 +1,41 @@
 
+Changes with nginx 1.21.4                                        02 Nov 2021
+
+    *) Change: support for NPN instead of ALPN to establish HTTP/2
+       connections has been removed.
+
+    *) Change: now nginx rejects SSL connections if ALPN is used by the
+       client, but no supported protocols can be negotiated.
+
+    *) Change: the default value of the "sendfile_max_chunk" directive was
+       changed to 2 megabytes.
+
+    *) Feature: the "proxy_half_close" directive in the stream module.
+
+    *) Feature: the "ssl_alpn" directive in the stream module.
+
+    *) Feature: the $ssl_alpn_protocol variable.
+
+    *) Feature: support for SSL_sendfile() when using OpenSSL 3.0.
+
+    *) Feature: the "mp4_start_key_frame" directive in the
+       ngx_http_mp4_module.
+       Thanks to Tracey Jaquith.
+
+    *) Bugfix: in the $content_length variable when using chunked transfer
+       encoding.
+
+    *) Bugfix: after receiving a response with incorrect length from a
+       proxied backend nginx might nevertheless cache the connection.
+       Thanks to Awdhesh Mathpal.
+
+    *) Bugfix: invalid headers from backends were logged at the "info" level
+       instead of "error"; the bug had appeared in 1.21.1.
+
+    *) Bugfix: requests might hang when using HTTP/2 and the "aio_write"
+       directive.
+
+
 Changes with nginx 1.21.3                                        07 Sep 2021
 
     *) Change: optimization of client request body reading when using