diff --git a/Gemfile b/Gemfile
index 3705bd8..52cfda0 100755
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
-ruby '1.9.3'
+ruby '2.1.3'
 source 'https://rubygems.org'
 
-gem 'rake', '~> 10.3'
+gem 'rake', '~> 10.4'
 gem 'mysql-pr', '~> 2.9'
 gem 'postgres-pr', '~> 0.6'
 
diff --git a/mysqltopostgres.gemspec b/mysqltopostgres.gemspec
index c3a2854..8253af7 100755
--- a/mysqltopostgres.gemspec
+++ b/mysqltopostgres.gemspec
@@ -83,7 +83,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency('mysql-pr', ['~>  2.9'])
   s.add_dependency('postgres-pr', ['~>  0.6'])
-  s.add_dependency('activerecord', ['~>  3.2'])
+  s.add_dependency('activerecord', ['~>  4.2.1'])
   s.add_dependency('test-unit', ['~>  2.1'])
 
   if RUBY_PLATFORM == 'java'