diff --git a/blktrace.spec b/blktrace.spec
index 223846d..8bca0c2 100644
--- a/blktrace.spec
+++ b/blktrace.spec
@@ -1,12 +1,12 @@
 Name:    blktrace
 Version: 1.2.0
-Release: 20
+Release: 21
 Summary: Block IO tracer in the Linux kernel
 License: GPLv2+
 Source:  http://brick.kernel.dk/snaps/blktrace-%{version}.tar.bz2
 URL:     https://git.kernel.dk/cgit/blktrace 
 
-BuildRequires: gcc, git, xz, libaio-devel, python3, librsvg2-devel blktrace sysstat theora-tools gdb
+BuildRequires: gcc, git, xz, libaio-devel, python3, librsvg2-devel blktrace sysstat theora-tools
 Provides:      iowatcher = %{version}-%{release}
 Obsoletes:     iowatcher < %{version}-%{release}
 Requires:      python3
@@ -61,6 +61,9 @@ make dest=%{buildroot} prefix=%{buildroot}/%{_prefix} mandir=%{buildroot}/%{_man
 %{_mandir}/man8/*
 
 %changelog
+* Fri Jul 23 2021 zhouwenpei <zhouwenpei1@huawei.com> - 1.2.0-21
+- remove useless buildrequires
+
 * Sun Jul 12 2020 Zhiqiang Liu <liuzhiqiang26@huawei.com> - 1.2.0-20
 - backport upstream patches