diff --git a/rubygem-kramdown.spec b/rubygem-kramdown.spec
index c40c72f..53819be 100644
--- a/rubygem-kramdown.spec
+++ b/rubygem-kramdown.spec
@@ -1,7 +1,7 @@
 %global gem_name kramdown
 Name:                rubygem-%{gem_name}
 Version:             2.1.0
-Release:             3
+Release:             4
 Summary:             A fast pure Ruby yet-another-markdown-parser
 License:             MIT
 URL:                 http://kramdown.rubyforge.org
@@ -9,7 +9,7 @@ Source0:             https://rubygems.org/gems/%{gem_name}-%{version}.gem
 Patch0000:           CVE-2021-28834.patch
 Patch0001:           CVE-2020-14001.patch
 BuildRequires:       ruby(release) rubygems-devel rubygem(minitest) >= 5 rubygem(rouge)
-BuildRequires:       rubygem(test-unit) tidy tex tex(acronym.sty) tex(amssymb.sty)
+BuildRequires:       rubygem(test-unit) tidy tex tex(acronym.sty) tex(amssymb.sty) rubygem(rexml)
 BuildRequires:       tex(amsmath.sty) tex(amsthm.sty) tex(amsfonts.sty) tex(utf8x.def) tex-ec
 Requires:            ruby(release)  ruby(rubygems)
 BuildArch:           noarch
@@ -85,6 +85,9 @@ popd
 %doc %{gem_docdir}
 
 %changelog
+* Sat Jan 29 2022 liyanan <liyanan32@huawei.com> - 2.1.0-4
+- Add buildrequire rubygem-rexml
+
 * Fri Jul 23 2021 yaoxin <yaoxin30@huawei.com> - 2.1.0-3
 - fix CVE-2020-14001