Signed the gem.

certs/parndt.pem

+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

refinerycms-acts-as-indexed.gemspec

@@ -15,6 +15,11 @@ Gem::Specification.new do |s|
 
   s.add_dependency    'refinerycms-core', ['>= 3.0.0', '< 5.0']
   s.add_dependency    'acts_as_indexed', '~> 0.8.0'
-  s.add_dependency    'decorators', '~> 2.0.0'
+  s.add_dependency    'decorators', '~> 2.0'
   s.add_dependency    'stringex', '~> 2.5.2'
+
+  s.cert_chain  = ['certs/parndt.pem']
+  if $0 =~ /gem\z/ && ARGV.include?("build") && ARGV.include?(__FILE__)
+    s.signing_key = File.expand_path("~/.ssh/gem-private_key.pem")
+  end
 end