diff --git a/Library/Homebrew/vendor/README.md b/Library/Homebrew/vendor/README.md
index 906d429189..b408631c7a 100644
--- a/Library/Homebrew/vendor/README.md
+++ b/Library/Homebrew/vendor/README.md
@@ -1,7 +1,7 @@
 Vendored Dependencies
 =====================
 
-* [plist](https://github.com/bleything/plist), version 3.1.0
+* [plist](https://github.com/patsplat/plist), version 3.3.0
 
 * [ruby-macho](https://github.com/Homebrew/ruby-macho), version 1.1.0
 
diff --git a/Library/Homebrew/vendor/plist/plist.rb b/Library/Homebrew/vendor/plist/plist.rb
index 0b828afc6a..82ecb27d28 100755
--- a/Library/Homebrew/vendor/plist/plist.rb
+++ b/Library/Homebrew/vendor/plist/plist.rb
@@ -1,5 +1,5 @@
-#!/usr/bin/env ruby
-#
+# encoding: utf-8
+
 # = plist
 #
 # This is the main file for plist. Everything interesting happens in
@@ -15,7 +15,7 @@ require 'stringio'
 
 require_relative 'plist/generator'
 require_relative 'plist/parser'
+require_relative 'plist/version'
 
 module Plist
-  VERSION = '3.1.0'
 end
diff --git a/Library/Homebrew/vendor/plist/plist/generator.rb b/Library/Homebrew/vendor/plist/plist/generator.rb
old mode 100644
new mode 100755
index 3b84c301f3..84bef3aaf6
--- a/Library/Homebrew/vendor/plist/plist/generator.rb
+++ b/Library/Homebrew/vendor/plist/plist/generator.rb
@@ -1,12 +1,12 @@
-#!/usr/bin/env ruby
-#
+# encoding: utf-8
+
 # = plist
 #
 # Copyright 2006-2010 Ben Bleything and Patrick May
 # Distributed under the MIT License
 #
 
-module Plist ; end
+module Plist; end
 
 # === Create a plist
 # You can dump an object to a plist in one of two ways:
@@ -94,7 +94,7 @@ module Plist::Emit
         output << tag('date', element.utc.strftime('%Y-%m-%dT%H:%M:%SZ'))
       when Date # also catches DateTime
         output << tag('date', element.strftime('%Y-%m-%dT%H:%M:%SZ'))
-      when String, Symbol, Fixnum, Bignum, Integer, Float
+      when String, Symbol, Integer, Float
         output << tag(element_type(element), CGI::escapeHTML(element.to_s))
       when IO, StringIO
         element.rewind
@@ -159,7 +159,7 @@ module Plist::Emit
     when String, Symbol
       'string'
 
-    when Fixnum, Bignum, Integer
+    when Integer
       'integer'
 
     when Float
diff --git a/Library/Homebrew/vendor/plist/plist/parser.rb b/Library/Homebrew/vendor/plist/plist/parser.rb
index 7d8bfab07f..4de13f8814 100755
--- a/Library/Homebrew/vendor/plist/plist/parser.rb
+++ b/Library/Homebrew/vendor/plist/plist/parser.rb
@@ -1,5 +1,5 @@
-#!/usr/bin/env ruby
-#
+# encoding: utf-8
+
 # = plist
 #
 # Copyright 2006-2010 Ben Bleything and Patrick May
@@ -69,19 +69,14 @@ module Plist
         @xml = plist_data_or_file
       end
 
-      # TODO: Update vendored `plist` parser when
-      #       https://github.com/patsplat/plist/pull/38
-      #       is merged.
-      @xml.force_encoding("UTF-8")
-
       @listener = listener
     end
 
     TEXT       = /([^<]+)/
-    XMLDECL_PATTERN = /<\?xml\s+(.*?)\?>*/um
-    DOCTYPE_PATTERN = /\s*<!DOCTYPE\s+(.*?)(\[|>)/um
-    COMMENT_START = /\A<!--/u
-    COMMENT_END = /.*?-->/um
+    XMLDECL_PATTERN = /<\?xml\s+(.*?)\?>*/m
+    DOCTYPE_PATTERN = /\s*<!DOCTYPE\s+(.*?)(\[|>)/m
+    COMMENT_START = /\A<!--/
+    COMMENT_END = /.*?-->/m
 
 
     def parse
@@ -96,7 +91,14 @@ module Plist
         if @scanner.scan(COMMENT_START)
           @scanner.scan(COMMENT_END)
         elsif @scanner.scan(XMLDECL_PATTERN)
+          encoding = parse_encoding_from_xml_declaration(@scanner[1])
+          next if encoding.nil?
+
+          # use the specified encoding for the rest of the file
+          next unless String.method_defined?(:force_encoding)
+          @scanner.string = @scanner.rest.force_encoding(encoding)
         elsif @scanner.scan(DOCTYPE_PATTERN)
+          next
         elsif @scanner.scan(start_tag)
           @listener.tag_start(@scanner[1], nil)
           if (@scanner[2] =~ /\/$/)
@@ -111,6 +113,22 @@ module Plist
         end
       end
     end
+
+    private
+
+    def parse_encoding_from_xml_declaration(xml_declaration)
+      return unless defined?(Encoding)
+
+      xml_encoding = xml_declaration.match(/(?:\A|\s)encoding=(?:"(.*?)"|'(.*?)')(?:\s|\Z)/)
+
+      return if xml_encoding.nil?
+
+      begin
+        Encoding.find(xml_encoding[1])
+      rescue ArgumentError
+        nil
+      end
+    end
   end
 
   class PTag
@@ -218,7 +236,7 @@ module Plist
       data = Base64.decode64(text.gsub(/\s+/, '')) unless text.nil?
       begin
         return Marshal.load(data)
-      rescue Exception => e
+      rescue Exception
         io = StringIO.new
         io.write data
         io.rewind
diff --git a/Library/Homebrew/vendor/plist/plist/version.rb b/Library/Homebrew/vendor/plist/plist/version.rb
new file mode 100755
index 0000000000..80b1f73ddc
--- /dev/null
+++ b/Library/Homebrew/vendor/plist/plist/version.rb
@@ -0,0 +1,5 @@
+# encoding: utf-8
+
+module Plist
+  VERSION = '3.3.0'.freeze
+end