diff --git a/Gemfile b/Gemfile
index e312a8aa5..6eabb6f9e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -70,7 +70,7 @@ if File.exist?(database_file)
       when 'mysql2'
         gem "mysql2", "~> 0.5.0", :platforms => [:mri, :mingw, :x64_mingw]
       when /postgresql/
-        gem "pg", "~> 1.4.2", :platforms => [:mri, :mingw, :x64_mingw]
+        gem 'pg', '~> 1.5.3', :platforms => [:mri, :mingw, :x64_mingw]
       when /sqlite3/
         gem 'sqlite3', '~> 1.6.0', :platforms => [:mri, :mingw, :x64_mingw]
       when /sqlserver/