diff --git a/dtkcommon.spec b/dtkcommon.spec
index 1438007..b7fa74f 100644
--- a/dtkcommon.spec
+++ b/dtkcommon.spec
@@ -2,7 +2,7 @@
 
 Name:    dtkcommon
 Version: 5.5.18
-Release: 1%{?dist}
+Release: 2%{?dist}
 Summary: dtk common files
 Source0: %{name}-%{version}.orig.tar.xz
 
@@ -10,8 +10,7 @@ License: GPLv3
 
 BuildRequires:  qt5-qtbase-devel
 
-Obsoletes:      dtkcore <= 5.4.10
-Obsoletes:      dtkcore-devel <= 5.4.10
+Conflicts:      dtkcore < 5.4.12
 
 
 %description
@@ -20,6 +19,7 @@ dtk common files
 %package devel
 Summary:        Development package for %{sname}
 Requires:       %{name}%{?_isa} = %{version}-%{release}
+Conflicts:      dtkcore-devel < 5.4.12
 
 %description devel
 dtk common files - devel
@@ -50,5 +50,8 @@ export PATH="%{_qt5_bindir}:$PATH"
 %{_libdir}/*/mkspecs/modules/*
 
 %changelog
+* Fri Jun 16 2023 liweigang <liweiganga@uniontech.com> - 5.5.18-2
+- fix: Troubleshoot downgrade issues
+
 * Mon Jun 13 2022 uoser <uoser@uniontech.com> - 5.5.18-1
 - update: update to 5.5.18-1