diff --git a/rubygem-domain_name.spec b/rubygem-domain_name.spec
index 0dec2ac..7be347d 100644
--- a/rubygem-domain_name.spec
+++ b/rubygem-domain_name.spec
@@ -7,10 +7,10 @@ Release:	1
 License:	BSD and (MPLv1.1 or GPLv2+ or LGPLv2+)
 URL:		https://github.com/knu/ruby-domain_name
 Source0:	https://rubygems.org/gems/%{gem_name}-%{version}.gem
-Requires:            	ruby(release)
-BuildRequires:       	ruby(release)
-Requires:            	ruby(rubygems) 	rubygem(unf)
-BuildRequires:       	rubygems-devel 	rubygem(test-unit) 	rubygem(unf)
+Requires:       ruby(release)
+BuildRequires:  ruby(release)
+Requires:       ruby(rubygems) 	rubygem(unf)
+BuildRequires:  rubygems-devel 	rubygem(test-unit) 	rubygem(unf)
 BuildArch:	noarch
 Provides:	rubygem(%{gem_name}) = %{version}-%{release}
 %description