diff --git a/Changelog b/Changelog
index 9f67768..e7eed45 100644
--- a/Changelog
+++ b/Changelog
@@ -24,6 +24,8 @@ Changelog
 	maxinterval.diff: Increase max interval for updates.
 	See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=129370
 	http://www.dyndns.com/support/services/dyndns/faq.html#q15
+	* Changed max-interval to 25days.  See
+	https://www.dyndns.com/services/dns/dyndns/faq.html
 
 
 3.7.0
diff --git a/ddclient b/ddclient
index f170ec9..1160d7a 100755
--- a/ddclient
+++ b/ddclient
@@ -352,7 +352,7 @@ my %variables = (
 	'atime'               => setv(T_NUMBER, 0, 1, 0, 0,                   undef),
 	'status'              => setv(T_ANY,    0, 1, 0, '',                  undef),
 	'min-interval'        => setv(T_DELAY,  0, 0, 1, interval('30s'),     0),
-	'max-interval'        => setv(T_DELAY,  0, 0, 1, interval('30d'),     0),
+	'max-interval'        => setv(T_DELAY,  0, 0, 1, interval('25d'),     0),
 	'min-error-interval'  => setv(T_DELAY,  0, 0, 1, interval('5m'),      0),
 
 	'warned-min-interval'       => setv(T_ANY,    0, 1, 0, 0,             undef),