diff --git a/bison.spec b/bison.spec
index 3c6381b..a880db4 100644
--- a/bison.spec
+++ b/bison.spec
@@ -1,6 +1,6 @@
 Name:           bison
 Version:        3.0.5
-Release:        3
+Release:        4
 Summary:        A GNU general-purpose parser generator
 License:        GPLv3+
 URL:            http://www.gnu.org/software/bison/
@@ -68,7 +68,8 @@ fi
 %{_datadir}/aclocal/bison*
 %{_datadir}/bison
 %{_datadir}/bison/yacc*
-%{_bindir}/*
+%{_bindir}/bison
+%exclude %{_bindir}/yacc
 %exclude %{_docdir}/%{name}/COPYING
 
 %files help
@@ -88,6 +89,12 @@ fi
 %{_datadir}/locale/*/LC_MESSAGES/bison-runtime.mo
 
 %changelog
+* Wed Oct 16 2019 shenyangyang <shenyangyang4@huawei.com> - 3.0.5-4
+- Type:enhancement
+- ID:NA
+- SUG:NA
+- DESC:delete unneeded files that conflicts with byacc package
+
 * Sun Sep 29 2019 shenyangyang <shenyangyang4@huawei.com> - 3.0.5-3
 - Type:NA
 - ID:NA