Sign the gem

certs/gem-public_cert.pem

@@ -0,0 +1,26 @@
+-----BEGIN CERTIFICATE-----
+MIIEbjCCAtagAwIBAgIBATANBgkqhkiG9w0BAQsFADAwMS4wLAYDVQQDDCVrb3Rv
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+-----END CERTIFICATE-----

pg.gemspec

@@ -4,6 +4,10 @@
 require_relative 'lib/pg/version'
 
 Gem::Specification.new do |spec|
+  spec.cert_chain = ['certs/gem-public_cert.pem']
+  signing_key = File.expand_path '../gem-private_key.pem'
+  spec.signing_key = signing_key if File.file? signing_key
+
   spec.name          = "pg"
   spec.version       = PG::VERSION
   spec.authors       = ["Michael Granger", "Lars Kanis"]
@@ -27,6 +31,6 @@ Gem::Specification.new do |spec|
   end
   spec.extensions    = ["ext/extconf.rb"]
   spec.require_paths = ["lib"]
-  spec.cert_chain    = ["certs/ged.pem"]
+  # spec.cert_chain    = ["certs/ged.pem"]
   spec.rdoc_options  = ["--main", "README.rdoc"]
 end