diff --git a/sendmail.spec b/sendmail.spec
index db10710b7295deb77492277509cf3c6757bbc873..cabb6610f0b8d3252358645ed7228495d174e1ae 100644
--- a/sendmail.spec
+++ b/sendmail.spec
@@ -1,6 +1,6 @@
 Name:          sendmail
 Version:       8.17.1
-Release:       6
+Release:       7
 Summary:       A classic mail transfer agent from the Unix world
 License:       Sendmail
 URL:           http://www.sendmail.org/
@@ -342,7 +342,7 @@ if [ ! -f %{_sysconfdir}/pki/tls/certs/sendmail.pem ]; then
     fi
 
     %{_bindir}/openssl req -new -key %{_sysconfdir}/pki/tls/private/sendmail.key -x509 -sha256 \
-        -days 365 -set_serial $RANDOM -out %{_sysconfdir}/pki/tls/certs/sendmail.pem \
+        -days 730 -set_serial $RANDOM -out %{_sysconfdir}/pki/tls/certs/sendmail.pem \
         -subj "/C=--/ST=SomeState/L=SomeCity/O=SomeOrganization/OU=SomeOrganizationalUnit/CN=${FQDN}/emailAddress=root@${FQDN}"
     chmod 600 %{_sysconfdir}/pki/tls/certs/sendmail.pem
 fi
@@ -467,6 +467,12 @@ exit 0
 
 
 %changelog
+* Fri Mar 10 2023 xinghe <xinghe2@h-partners.com> - 8.17.1-7
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC: modify certificate validity period
+
 * Tue Dec 13 2022 xinghe <xinghe2@h-partners.com> - 8.17.1-6
 - Type:bugfix
 - ID:NA