diff --git a/Manifest.txt b/Manifest.txt
index 4bd01241..cb8815d5 100644
--- a/Manifest.txt
+++ b/Manifest.txt
@@ -51,8 +51,6 @@ lib/puma/minissl.rb
 lib/puma/null_io.rb
 lib/puma/plugin.rb
 lib/puma/plugin/tmp_restart.rb
-lib/puma/rack/backports/uri/common_18.rb
-lib/puma/rack/backports/uri/common_192.rb
 lib/puma/rack/backports/uri/common_193.rb
 lib/puma/rack/builder.rb
 lib/puma/rack/urlmap.rb
diff --git a/Rakefile b/Rakefile
index 99202b3f..870b4177 100644
--- a/Rakefile
+++ b/Rakefile
@@ -18,7 +18,7 @@ HOE = Hoe.spec "puma" do
   spec_extras[:executables] = ['puma', 'pumactl']
   spec_extras[:homepage] = self.urls.first
 
-  require_ruby_version ">= 1.8.7"
+  require_ruby_version ">= 1.9.3"
 
   dependency "rack", [">= 1.1", "< 2.0"], :development
 
@@ -155,4 +155,3 @@ namespace :test do
     task :all => [:test, "test:integration"]
   end
 end
-
diff --git a/lib/puma/client.rb b/lib/puma/client.rb
index e8ebc010..945cdb29 100644
--- a/lib/puma/client.rb
+++ b/lib/puma/client.rb
@@ -291,7 +291,7 @@ module Puma
         raise HttpParserError,
           "HEADER is longer than allowed, aborting client early."
       end
-      
+
       false
     end
 
diff --git a/lib/puma/compat.rb b/lib/puma/compat.rb
index 787e748d..a6e3d374 100644
--- a/lib/puma/compat.rb
+++ b/lib/puma/compat.rb
@@ -6,13 +6,9 @@ class String
   end
 
   unless method_defined? :byteslice
-    if RUBY_VERSION < '1.9'
-      alias_method :byteslice, :[]
-    else
-      def byteslice(*arg)
-        enc = self.encoding
-        self.dup.force_encoding(Encoding::ASCII_8BIT).slice(*arg).force_encoding(enc)
-      end
+    def byteslice(*arg)
+      enc = self.encoding
+      self.dup.force_encoding(Encoding::ASCII_8BIT).slice(*arg).force_encoding(enc)
     end
   end
 end
diff --git a/lib/puma/rack/backports/uri/common_18.rb b/lib/puma/rack/backports/uri/common_18.rb
deleted file mode 100644
index bbe4fe07..00000000
--- a/lib/puma/rack/backports/uri/common_18.rb
+++ /dev/null
@@ -1,59 +0,0 @@
-# :stopdoc:
-
-# Stolen from ruby core's uri/common.rb, with modifications to support 1.8.x
-#
-# https://github.com/ruby/ruby/blob/trunk/lib/uri/common.rb
-#
-#
-
-module URI
-  begin
-    TBLENCWWWCOMP_ = {} # :nodoc:
-    256.times do |i|
-      TBLENCWWWCOMP_[i.chr] = '%%%02X' % i
-    end
-    TBLENCWWWCOMP_[' '] = '+'
-    TBLENCWWWCOMP_.freeze
-    TBLDECWWWCOMP_ = {} # :nodoc:
-    256.times do |i|
-      h, l = i>>4, i&15
-      TBLDECWWWCOMP_['%%%X%X' % [h, l]] = i.chr
-      TBLDECWWWCOMP_['%%%x%X' % [h, l]] = i.chr
-      TBLDECWWWCOMP_['%%%X%x' % [h, l]] = i.chr
-      TBLDECWWWCOMP_['%%%x%x' % [h, l]] = i.chr
-    end
-    TBLDECWWWCOMP_['+'] = ' '
-    TBLDECWWWCOMP_.freeze
-  rescue Exception
-  end
-
-  # Encode given +s+ to URL-encoded form data.
-  #
-  # This method doesn't convert *, -, ., 0-9, A-Z, _, a-z, but does convert SP
-  # (ASCII space) to + and converts others to %XX.
-  #
-  # This is an implementation of
-  # http://www.w3.org/TR/html5/forms.html#url-encoded-form-data
-  #
-  # See URI.decode_www_form_component, URI.encode_www_form
-  def self.encode_www_form_component(s)
-    str = s.to_s
-    if RUBY_VERSION < "1.9" && $KCODE =~ /u/i
-      str.gsub(/([^ a-zA-Z0-9_.-]+)/) do
-        '%' + $1.unpack('H2' * Rack::Utils.bytesize($1)).join('%').upcase
-      end.tr(' ', '+')
-    else
-      str.gsub(/[^*\-.0-9A-Z_a-z]/) {|m| TBLENCWWWCOMP_[m]}
-    end
-  end
-
-  # Decode given +str+ of URL-encoded form data.
-  #
-  # This decodes + to SP.
-  #
-  # See URI.encode_www_form_component, URI.decode_www_form
-  def self.decode_www_form_component(str, enc=nil)
-    raise ArgumentError, "invalid %-encoding (#{str})" unless /\A(?:%[0-9a-fA-F]{2}|[^%])*\z/ =~ str
-    str.gsub(/\+|%[0-9a-fA-F]{2}/) {|m| TBLDECWWWCOMP_[m]}
-  end
-end
diff --git a/lib/puma/rack/backports/uri/common_192.rb b/lib/puma/rack/backports/uri/common_192.rb
deleted file mode 100644
index a3cc4d1d..00000000
--- a/lib/puma/rack/backports/uri/common_192.rb
+++ /dev/null
@@ -1,55 +0,0 @@
-# :stopdoc:
-
-# Stolen from ruby core's uri/common.rb @32618ba to fix DoS issues in 1.9.2
-#
-# https://github.com/ruby/ruby/blob/32618ba7438a2247042bba9b5d85b5d49070f5e5/lib/uri/common.rb
-#
-# Issue:
-# http://redmine.ruby-lang.org/issues/5149
-#
-# Relevant Fixes:
-# https://github.com/ruby/ruby/commit/b5f91deee04aa6ccbe07c23c8222b937c22a799b
-# https://github.com/ruby/ruby/commit/93177c1e5c3906abf14472ae0b905d8b5c72ce1b
-#
-# This should probably be removed once there is a Ruby 1.9.2 patch level that
-# includes this fix.
-
-require 'uri/common'
-
-module URI
-  begin
-    TBLDECWWWCOMP_ = {} unless const_defined?(:TBLDECWWWCOMP_)  #:nodoc:
-    if TBLDECWWWCOMP_.empty?
-      256.times do |i|
-        h, l = i>>4, i&15
-        TBLDECWWWCOMP_['%%%X%X' % [h, l]] = i.chr
-        TBLDECWWWCOMP_['%%%x%X' % [h, l]] = i.chr
-        TBLDECWWWCOMP_['%%%X%x' % [h, l]] = i.chr
-        TBLDECWWWCOMP_['%%%x%x' % [h, l]] = i.chr
-      end
-      TBLDECWWWCOMP_['+'] = ' '
-      TBLDECWWWCOMP_.freeze
-    end
-  rescue Exception
-  end
-
-  def self.decode_www_form(str, enc=Encoding::UTF_8)
-    return [] if str.empty?
-    unless /\A#{WFKV_}=#{WFKV_}(?:[;&]#{WFKV_}=#{WFKV_})*\z/o =~ str
-      raise ArgumentError, "invalid data of application/x-www-form-urlencoded (#{str})"
-    end
-    ary = []
-    $&.scan(/([^=;&]+)=([^;&]*)/) do
-      ary << [decode_www_form_component($1, enc), decode_www_form_component($2, enc)]
-    end
-    ary
-  end
-
-  def self.decode_www_form_component(str, enc=Encoding::UTF_8)
-    raise ArgumentError, "invalid %-encoding (#{str})" unless /\A[^%]*(?:%\h\h[^%]*)*\z/ =~ str
-    str.gsub(/\+|%\h\h/, TBLDECWWWCOMP_).force_encoding(enc)
-  end
-
-  remove_const :WFKV_ if const_defined?(:WFKV_)
-  WFKV_ = '(?:[^%#=;&]*(?:%\h\h[^%#=;&]*)*)' # :nodoc:
-end
diff --git a/lib/puma/util.rb b/lib/puma/util.rb
index d46015a2..9937a887 100644
--- a/lib/puma/util.rb
+++ b/lib/puma/util.rb
@@ -1,10 +1,6 @@
 major, minor, patch = RUBY_VERSION.split('.').map { |v| v.to_i }
 
-if major == 1 && minor < 9
-  require 'puma/rack/backports/uri/common_18'
-elsif major == 1 && minor == 9 && patch == 2 && RUBY_PATCHLEVEL <= 328 && RUBY_ENGINE != 'jruby'
-  require 'puma/rack/backports/uri/common_192'
-elsif major == 1 && minor == 9 && patch == 3 && RUBY_PATCHLEVEL < 125
+if major == 1 && minor == 9 && patch == 3 && RUBY_PATCHLEVEL < 125
   require 'puma/rack/backports/uri/common_193'
 else
   require 'uri/common'
diff --git a/test/test_puma_server_ssl.rb b/test/test_puma_server_ssl.rb
index cd506ec9..768aab2c 100644
--- a/test/test_puma_server_ssl.rb
+++ b/test/test_puma_server_ssl.rb
@@ -114,19 +114,17 @@ class TestPumaServerSSL < Test::Unit::TestCase
     assert_equal "https", body
   end
 
-  unless RUBY_VERSION =~ /^1.8/
-    def test_ssl_v3_rejection
-      return if DISABLE_SSL
-      @http.ssl_version='SSLv3'
-      assert_raises(OpenSSL::SSL::SSLError) do
-        @http.start do
-          Net::HTTP::Get.new '/'
-        end
-      end
-      unless defined?(JRUBY_VERSION)
-        assert_match("wrong version number", @events.error.message) if @events.error
+  def test_ssl_v3_rejection
+    return if DISABLE_SSL
+    @http.ssl_version='SSLv3'
+    assert_raises(OpenSSL::SSL::SSLError) do
+      @http.start do
+        Net::HTTP::Get.new '/'
       end
     end
+    unless defined?(JRUBY_VERSION)
+      assert_match("wrong version number", @events.error.message) if @events.error
+    end
   end
 
 end