diff --git a/docs/releasenotes.rst b/docs/releasenotes.rst
index a53321062b262897f9aafe690c38bf21ddc0876e..937f89b7a8480ca631e6de0ad5b4dce47585ba5e 100644
--- a/docs/releasenotes.rst
+++ b/docs/releasenotes.rst
@@ -20,6 +20,30 @@ Breaking changes:
 
   * Support for Debian 8 Jessie has been dropped.
 
+* ``mail_forwarder`` role
+
+  * Use 2048-bit Diffie-Hellman parameters for relevant TLS
+    ciphers. This could introduce incompatibility with older
+    clients/servers trying to connect to the SMTP server.
+
+* ``mail_server`` role
+
+  * Use 2048-bit Diffie-Hellman parameters for relevant TLS
+    ciphers. This could introduce incompatibility with older
+    clients/servers trying to connect to the SMTP/IMAP server.
+
+* ``web_server`` role
+
+  * Use 2048-bit Diffie-Hellman parameters for relevant TLS
+    ciphers. This could introduce incompatibility with older clients
+    trying to connect to the web server.
+
+* ``xmpp_server`` role
+
+  * Use 2048-bit Diffie-Hellman parameters for relevant TLS
+    ciphers. This could introduce incompatibility with older
+    clients/servers trying to connect to the XMPP server.
+
 Bug fixes:
 
 * ``common`` role