diff --git a/rubygem-rack.spec b/rubygem-rack.spec
index 0eeb865d182c108271594da8f4ab5bfc514b5e40..5743a55e25e0a1267edea34e39e77160e1f1c14e 100644
--- a/rubygem-rack.spec
+++ b/rubygem-rack.spec
@@ -4,12 +4,12 @@
 Name:    rubygem-%{gem_name}
 Version: 2.2.2
 Epoch:   1
-Release: 1
+Release: 2
 Summary: A modular Ruby webserver interface
 License: MIT and BSD
 URL:     https://rack.github.io/
 Source0: https://rubygems.org/downloads/%{gem_name}-%{version}.gem
-BuildRequires: ruby(release) rubygems-devel ruby >= 2.2.2 rubygem(concurrent-ruby)
+BuildRequires: ruby(release) rubygems-devel ruby >= 2.2.2
 BuildRequires: memcached rubygem(memcache-client) rubygem(minitest)
 BuildRequires: rubygem(memcache-client)
 BuildRequires: rubygem(minitest)
@@ -97,6 +97,9 @@ popd
 %doc %{gem_instdir}/contrib
 
 %changelog
+* Mon Mar 7 2022 duyiwei<duyiwei@kylinos.cn>- 1:2.2.2-2
+- delete BuildRequires rubygem(concurrent-ruby)
+
 * Mon Feb  8 2021 sunguoshuai<sunguoshuai@huawei.com>- 1:2.2.2-1
 - Upgrade to 1:2.2.2