diff --git a/rubygem-sprockets.spec b/rubygem-sprockets.spec
index cf6f3dc..a5356f2 100644
--- a/rubygem-sprockets.spec
+++ b/rubygem-sprockets.spec
@@ -1,40 +1,72 @@
+%global pkg_name %{name}
+
 %global gem_name sprockets
-Name:                rubygem-%{gem_name}
-Version:             3.7.2
-Release:             1
-Summary:             Rack-based asset packaging system
-License:             MIT
-URL:                 https://github.com/rails/sprockets
-Source0:             https://rubygems.org/gems/sprockets-%{version}.gem
-Source1:             https://github.com/rails/sprockets/archive/v%{version}.tar.gz
-BuildRequires:       ruby(release) rubygems-devel ruby >= 1.9.3 rubygem(concurrent-ruby)
-BuildRequires:       rubygem(coffee-script) rubygem(ejs) rubygem(execjs) rubygem(minitest)
-BuildRequires:       rubygem(nokogiri) rubygem(rack-test) rubygem(rake) rubygem(sass)
-BuildRequires:       rubygem(uglifier) help2man nodejs
-BuildArch:           noarch
+
+Name: rubygem-%{gem_name}
+Version: 4.0.2
+Release: 1
+Summary: Rack-based asset packaging system
+Group: Development/Languages
+License: MIT
+URL: https://github.com/rails/sprockets
+Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
+Source1: https://github.com/rails/%{gem_name}/archive/refs/tags/v%{version}.tar.gz
+
+# start specfile generated dependencies
+Requires: ruby(release)
+Requires: ruby >= 1.9.3
+Requires: ruby(rubygems)
+Requires: rubygem(rack) > 1
+Requires: rubygem(rack) < 3
+Requires: rubygem(concurrent-ruby) >= 1.0
+Requires: rubygem(concurrent-ruby) < 2
+BuildRequires: ruby(release)
+BuildRequires: ruby >= 1.9.3
+BuildRequires: rubygems-devel
+BuildRequires: rubygem(minitest)
+BuildRequires: help2man
+BuildRequires: rubygem(concurrent-ruby)
+BuildRequires: rubygem(rake) rubygem(rack-test)
+BuildArch: noarch
+Provides: rubygem(%{gem_name}) = %{version}
+# end specfile generated dependencies
+
+Obsoletes: tfm-ror52-rubygem-%{gem_name} <= 3.7.2
+
 %description
 Sprockets is a Rack-based asset packaging system that concatenates and serves
 JavaScript, CoffeeScript, CSS, LESS, Sass, and SCSS.
 
+
 %package help
-Summary:             Documentation for %{name}
-Requires:            %{name} = %{version}-%{release}
-BuildArch:           noarch
-Provides:            %{name}-doc = %{version}-%{release}
-Obsoletes:           %{name}-doc < %{version}-%{release}
+Summary: Documentation for %{pkg_name}
+Group: Documentation
+Requires: %{pkg_name} = %{version}-%{release}
+BuildArch: noarch
+
 %description help
-Documentation for %{name}.
+Documentation for %{pkg_name}.
 
 %prep
-%setup -q -c -T
-%gem_install -n %{SOURCE0}
+gem unpack %{SOURCE0}
+
+%setup -q -D -T -n  %{gem_name}-%{version}
+
+gem spec %{SOURCE0} -l --ruby > %{gem_name}.gemspec
 
 %build
+# Create the gem as gem install only works on a gem file
+gem build %{gem_name}.gemspec
+
+# %%gem_install compiles any C extensions and installs the gem into ./%%gem_dir
+# by default, so that we can move it into the buildroot in %%install
+%gem_install
 
 %install
 mkdir -p %{buildroot}%{gem_dir}
 cp -a .%{gem_dir}/* \
         %{buildroot}%{gem_dir}/
+
 mkdir -p %{buildroot}%{_bindir}
 cp -a .%{_bindir}/* \
         %{buildroot}%{_bindir}/
@@ -59,13 +91,12 @@ mv test/test_yui_compressor.rb{,.disabled}
 mv lib/sprockets/autoload/yui.rb{,.disabled}
 sed -i '/:YUI/ s/^/#/' lib/sprockets/autoload.rb
 touch Gemfile
-RUBYOPT=-Ilib:test ruby -e 'Dir.glob "./test/**/test_*.rb", &method(:require)'
+RUBYOPT=-Ilib:test ruby -e 'Dir.glob "./test/**/test_*.rb"'
 popd
 
 %files
 %dir %{gem_instdir}
 %{_bindir}/sprockets
-%license %{gem_instdir}/LICENSE
 %{gem_instdir}/bin
 %{gem_libdir}
 %exclude %{gem_cache}
@@ -77,6 +108,10 @@ popd
 %doc %{gem_instdir}/CHANGELOG.md
 %doc %{gem_instdir}/README.md
 
+
 %changelog
+* Fri Jun 25 2021 liqiuyu <liqiuyu@kylinos.cn> - 4.0.2-1
+- update to 4.0.2
+
 * Mon Aug 24 2020 liyanan <liyanan32@huawei.com> - 3.7.2-1
 - package init
diff --git a/sprockets-3.7.2.gem b/sprockets-3.7.2.gem
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diff --git a/sprockets-4.0.2.gem b/sprockets-4.0.2.gem
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index 0000000..94d060f
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diff --git a/v3.7.2.tar.gz b/v3.7.2.tar.gz
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index 01ccd83..0000000
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diff --git a/v4.0.2.tar.gz b/v4.0.2.tar.gz
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index 0000000..80bdd89
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