diff --git a/.gitignore b/.gitignore
index 01a766d..ea18600 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,9 +1,2 @@
-sass-3.2.3.gem/sass-3.2.6.gem
-/sass-3.2.14.gem
-/sass-3.3.8.gem
-/sass-3.4.4.gem
-/sass-3.4.19.gem
-/sass-3.4.22.gem
-/sass-3.4.23.gem
-/sass-3.4.25.gem
-/sass-3.5.6.gem
+/sass-*.gem
+/sass-*-tests.tgz
diff --git a/rubygem-sass.spec b/rubygem-sass.spec
index 9761f03..a415cdd 100644
--- a/rubygem-sass.spec
+++ b/rubygem-sass.spec
@@ -2,13 +2,17 @@
 %global gem_name sass
 
 Name: rubygem-%{gem_name}
-Version: 3.5.6
-Release: 2%{?dist}
+Version: 3.7.3
+Release: 1%{?dist}
 Summary: A powerful but elegant CSS compiler that makes CSS fun again
-Group: Development/Languages
 License: MIT
 URL: http://sass-lang.com/
 Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
+# git clone https://github.com/sass/ruby-sass.git
+# cd ruby-sass && git checkout 3.7.3
+# tar czvf sass-3.7.3-tests.tgz test/ Rakefile
+Source1: %{gem_name}-%{version}-tests.tgz
+
 # Use listen as a depencency instead of sass-listen.
 # sass-listen is a fork from original listen v3.0 branch to support Ruby <= 2.1.
 # https://github.com/sass/ruby-sass/pull/65
@@ -18,9 +22,6 @@ BuildRequires: rubygems-devel
 BuildRequires: rubygem(listen)
 BuildRequires: rubygem(minitest)
 BuildArch: noarch
-%if 0%{?rhel} == 7
-Provides: rubygem(%{gem_name}) = %{version}
-%endif
 
 %description
 Sass makes CSS fun again. Sass is an extension of CSS, adding
@@ -31,7 +32,6 @@ command line tool or a web-framework plugin.
 
 %package doc
 Summary: Documentation for %{name}
-Group: Documentation
 Requires: %{name} = %{version}-%{release}
 BuildArch: noarch
 
@@ -39,19 +39,14 @@ BuildArch: noarch
 Documentation for %{name}.
 
 %prep
-gem unpack %{SOURCE0}
-
-%setup -q -D -T -n  %{gem_name}-%{version}
+%setup -q -n %{gem_name}-%{version}
 
-gem spec %{SOURCE0} -l --ruby > %{gem_name}.gemspec
-%gemspec_remove_dep -g sass-listen -s %{gem_name}.gemspec
-%gemspec_add_dep -g listen -s %{gem_name}.gemspec
+%gemspec_remove_dep -g sass-listen -s ../%{gem_name}-%{version}.gemspec
+%gemspec_add_dep -g listen -s ../%{gem_name}-%{version}.gemspec
 %patch0 -p1
 
 %build
-
-gem build %{gem_name}.gemspec
-
+gem build ../%{gem_name}-%{version}.gemspec
 %gem_install
 
 %install
@@ -72,6 +67,9 @@ find %{buildroot}%{gem_instdir}/bin -type f | \
 
 %check
 pushd .%{gem_instdir}
+
+tar xaf %{SOURCE1}
+
 ruby -e 'Dir.glob "./test/**/*_test.rb", &method(:require)'
 popd
 
@@ -81,9 +79,9 @@ popd
 %{_bindir}/sass-convert
 %{_bindir}/scss
 %exclude %{gem_instdir}/.*
-%{gem_instdir}/CODE_OF_CONDUCT.md
 %license %{gem_instdir}/MIT-LICENSE
-%doc %{gem_instdir}/REVISION
+# Required on runtime from version.rb
+%{gem_instdir}/REVISION
 %{gem_instdir}/VERSION
 %{gem_instdir}/VERSION_DATE
 %{gem_instdir}/VERSION_NAME
@@ -97,12 +95,14 @@ popd
 
 %files doc
 %doc %{gem_docdir}
+%doc %{gem_instdir}/CODE_OF_CONDUCT.md
 %doc %{gem_instdir}/CONTRIBUTING.md
 %doc %{gem_instdir}/README.md
-%{gem_instdir}/Rakefile
-%{gem_instdir}/test
 
 %changelog
+* Mon Jan 14 2019 Pavel Valena <pvalena@redhat.com> - 3.7.3-1
+- Update to Sass 3.7.3
+
 * Sat Jul 14 2018 Fedora Release Engineering <releng@fedoraproject.org> - 3.5.6-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild
 
diff --git a/sources b/sources
index 5b62fc8..eaa5703 100644
--- a/sources
+++ b/sources
@@ -1 +1,2 @@
-SHA512 (sass-3.5.6.gem) = de7ac9598a36e60cdb440b6c8b36fed638ce3384ff078000c4d59eccb76b65d1c944aad8568ee078d6f2ca228d4f4c512143065bc20c5f91d28c2f0a170de96e
+SHA512 (sass-3.7.3.gem) = 14f6209e92a4cad15f67b6c11a919f53edfb8abf9b9e89795252e43fccc2628feca2cb40387b0c268009e93a08d908eba0cdf94b21bece5e8232bbe2f41fea09
+SHA512 (sass-3.7.3-tests.tgz) = bfba5002e6452b97952881fab3fd55cd2c8c4f6cd3a9ddb0628dddfb56b48aa5f07b685914a350510bfa8104d44f9193da110cf229e588c4be8734f664491d72