diff --git a/bind.spec b/bind.spec
index b047baa..622abac 100644
--- a/bind.spec
+++ b/bind.spec
@@ -30,7 +30,7 @@ Summary:  The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) serv
 Name:     bind
 License:  MPLv2.0
 Version:  9.16.23
-Release:  8
+Release:  9
 Epoch:    32
 Url:      https://www.isc.org/downloads/bind/
 #
@@ -253,6 +253,7 @@ or maintain keys for it.
 Summary: Manual pages of DNSSEC utilities
 Requires: bind-license = %{epoch}:%{version}-%{release}
 BuildArch:noarch
+Conflicts: %{name}-utils < %{epoch}:%{version}-%{release}
 
 %description dnssec-doc
 Bind-dnssec-doc contains manual pages for bind-dnssec-utils.
@@ -1102,6 +1103,9 @@ fi;
 %endif
 
 %changelog
+* Wed Aug 31 2022 yangchenguang <yangchenguang@uniontech.com> - 32:9.16.23-9
+- DESC: fix downgrade bind-utils conflict bind-dnssec-doc
+
 * Mon Aug 01 2022 jiangheng<jiangheng14@huawei.com> - 32:9.16.23-8
 - Type:bugfix
 - CVE: