diff --git a/install/lib/installer_base.lib.php b/install/lib/installer_base.lib.php
index 5b80a3c3ad34a305ac9883e5b76894c2f3f9134e..910e034cdacfde202dcafbe9283e34cc29aecfdd 100644
--- a/install/lib/installer_base.lib.php
+++ b/install/lib/installer_base.lib.php
@@ -553,7 +553,7 @@ class installer_base {
 		if(!stristr($options,'dont-create-certs')) {
 			//* Create the SSL certificate
 			$command = 'cd '.$config_dir.'; '
-					.'openssl req -new -outform PEM -out smtpd.cert -newkey rsa:2048 -nodes -keyout smtpd.key -keyform PEM -days 365 -x509';
+					.'openssl req -new -outform PEM -out smtpd.cert -newkey rsa:2048 -nodes -keyout smtpd.key -keyform PEM -days 3650 -x509';
 			exec($command);
 
 			$command = 'chmod o= '.$config_dir.'/smtpd.key';