diff --git a/.gitignore b/.gitignore
index cfa06f1..6490ef4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@
 /pg-0.18.1.gem
 /pg-0.18.2.gem
 /pg-0.18.4.gem
+/pg-0.20.0.gem
diff --git a/rubygem-pg-0.18.4-ruby24-integer-unification.patch b/rubygem-pg-0.18.4-ruby24-integer-unification.patch
deleted file mode 100644
index c7122ad..0000000
--- a/rubygem-pg-0.18.4-ruby24-integer-unification.patch
+++ /dev/null
@@ -1,21 +0,0 @@
-# HG changeset patch
-# User Lars Kanis <lars@greiz-reinsdorf.de>
-# Date 1484422186 -3600
-# Node ID a446dfaf9d8f7f0223fb42184c1ad36e42b97b17
-# Parent  6ebcebaad39ca2a2496bfd5912659f35d02b409f
-Bignum,Fixnum and Integer are the same in Ruby-2.4.
-
-Fixes #255 : https://bitbucket.org/ged/ruby-pg/issues/255
-
-diff --git a/spec/pg/type_map_by_class_spec.rb b/spec/pg/type_map_by_class_spec.rb
---- a/spec/pg/type_map_by_class_spec.rb
-+++ b/spec/pg/type_map_by_class_spec.rb
-@@ -59,7 +59,7 @@
- 	it "should retrieve particular conversions" do
- 		expect( tm[Integer] ).to eq(binaryenc_int)
- 		expect( tm[Float] ).to eq(textenc_float)
--		expect( tm[Bignum] ).to be_nil
-+		expect( tm[Range] ).to be_nil
- 		expect( derived_tm[raise_class] ).to be_kind_of(Proc)
- 		expect( derived_tm[Array] ).to eq(:array_type_map_for)
- 	end
diff --git a/rubygem-pg.spec b/rubygem-pg.spec
index b107b4e..6812800 100644
--- a/rubygem-pg.spec
+++ b/rubygem-pg.spec
@@ -1,11 +1,10 @@
 # Generated from pg-0.11.0.gem by gem2rpm -*- rpm-spec -*-
 %global gem_name pg
 
-Summary: A Ruby interface to the PostgreSQL RDBMS
 Name: rubygem-%{gem_name}
-Version: 0.18.4
-Release: 4%{?dist}
-Group: Development/Languages
+Version: 0.20.0
+Release: 1%{?dist}
+Summary: A Ruby interface to the PostgreSQL RDBMS
 # Upstream license clarification (https://bitbucket.org/ged/ruby-pg/issue/72/)
 #
 # The portions of the code that are BSD-licensed are licensed under
@@ -17,39 +16,37 @@ Source0: https://rubygems.org/gems/%{gem_name}-%{version}.gem
 # Disable RPATH.
 # https://bitbucket.org/ged/ruby-pg/issue/183
 Patch0: rubygem-pg-0.17.1-remove-rpath.patch
-# https://bitbucket.org/ged/ruby-pg/issues/255/ruby-24-test-failure
-# https://bitbucket.org/ged/ruby-pg/commits/a446dfaf9d8f7f0223fb42184c1ad36e42b97b17/raw
-Patch1: rubygem-pg-0.18.4-ruby24-integer-unification.patch
 BuildRequires: ruby(release)
 BuildRequires: rubygems-devel
 BuildRequires: ruby-devel
+# Compiler is required for build of gem binary extension.
+# https://fedoraproject.org/wiki/Packaging:C_and_C++#BuildRequires_and_Requires
+BuildRequires: gcc
 
 BuildRequires: postgresql-server postgresql-devel
 BuildRequires: rubygem(rspec)
 
 %description
 This is the extension library to access a PostgreSQL database from Ruby.
-This library works with PostgreSQL 7.4 and later.
+This library works with PostgreSQL 9.1 and later.
 
 
 %package doc
 Summary: Documentation for %{name}
-Group: Documentation
 Requires: %{name} = %{version}-%{release}
 BuildArch: noarch
 
 %description doc
 Documentation for %{name}.
 
-
 %prep
 gem unpack %{SOURCE0}
+
 %setup -q -D -T -n  %{gem_name}-%{version}
 
 gem spec %{SOURCE0} -l --ruby > %{gem_name}.gemspec
 
 %patch0 -p1
-%patch1 -p1
 
 %build
 # Create the gem as gem install only works on a gem file
@@ -126,6 +123,9 @@ popd
 %{gem_instdir}/spec
 
 %changelog
+* Mon May 29 2017 Vít Ondruch <vondruch@redhat.com> - 0.20.0-1
+- Update to pg 1.20.0.
+
 * Sat Feb 11 2017 Fedora Release Engineering <releng@fedoraproject.org> - 0.18.4-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
 
diff --git a/sources b/sources
index 0bc1ea7..4837935 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-ac35f7c82ca7ca7b8dfd8533a238a83d  pg-0.18.4.gem
+SHA512 (pg-0.20.0.gem) = 8c7ef2e3b0cb43f42b4f96c5995cd9ff8b01a0d0fc1cfd24d1053e27fa6d16f4eb7008fcb5f86445ad000429898df0215f7ee89b4da9500ddc4df04f5f2a10e2