diff --git a/gdbm.spec b/gdbm.spec
index e9c1487..c986bb1 100644
--- a/gdbm.spec
+++ b/gdbm.spec
@@ -1,17 +1,19 @@
 Name:       gdbm
 Version:    1.20
-Release:    2
+Release:    3
 Epoch:      1
 Summary:    A library of database functions that work similar to the standard UNIX dbm
 License:    GPLv3+
 URL:        http://www.gnu.org/software/gdbm/
 Source0:    http://ftp.gnu.org/gnu/gdbm/gdbm-%{version}.tar.gz
 
+Patch0:     0000-fix-gdbm_dump-usage-stack-overflow.patch
+
 BuildRequires:  gcc libtool gettext readline-devel 
 
 Provides:   %{name}-libs
 Provides:   %{name}-libs%{?_isa}
-Obsoletes:  %{name}-libs
+Obsoletes:  %{name}-libs <= %{version}
 
 %description
 GNU dbm (or GDBM, for short) is a library of database functions that
@@ -24,7 +26,7 @@ Summary:            Header files and libraries for development
 Requires:           %{name} = %{epoch}:%{version}-%{release}
 Requires(post):     info
 Requires(preun):    info
-Obsoletes:          %{name}-libs
+Obsoletes:          %{name}-libs <= %{version}
 
 %description        devel
 Gdbm-devel contains the header files and libraries for development.
@@ -96,10 +98,13 @@ fi
 %{_infodir}/*.info*
 
 %changelog
+* Fri Sep 10 2021 geruijun <geruijun@huawei.com> - 1.20-3
+- DESC: fix stack overflow in print_usage
+
 * Fri Jul 30 2021 chenyanpanHW <chenyanpan@huawei.com> - 1.20-2
 - DESC: delete -S git from %autosetup, and delete BuildRequires git
 
-* Fri Jul 20 2021 yanglongkang <yanglongkang@huawei.com> - 1.20-1
+* Tue Jul 20 2021 yanglongkang <yanglongkang@huawei.com> - 1.20-1
 - upgrade package to 1.20
 
 * Sat Jul 18 2020 Wangjun <wangjun196@huawei.com> - 1.18.1-1