diff --git a/.travis.yml b/.travis.yml
index e5af5c9..eb46469 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,10 +24,13 @@ gemfile:
   - gemfiles/rails_5.0.0.gemfile
   - gemfiles/rails_5.0.0.1.gemfile
   - gemfiles/rails_5.0.1.gemfile
+  - gemfiles/rails_5.0.2.gemfile
+  - gemfiles/rails_5.1.0.rc1.gemfile
 rvm:
   - 2.2.5
   - 2.3.1
   - 2.3.2
   - 2.3.3
+  - 2.4.0
 notifications:
   email: false
diff --git a/Appraisals b/Appraisals
index 7aa28f7..842560b 100644
--- a/Appraisals
+++ b/Appraisals
@@ -1,19 +1,21 @@
-appraise "rails-4.0.0" do
-  gem "rails", "4.0.0"
-end
+if RUBY_VERSION < "2.4.0"
+  appraise "rails-4.0.0" do
+    gem "rails", "4.0.0"
+  end
 
-appraise "rails-4.1.1" do
-  gem "rails", "4.1.1"
-end
+  appraise "rails-4.1.1" do
+    gem "rails", "4.1.1"
+  end
 
-appraise "rails-4.2.0" do
-  gem "rails", "4.2.0"
-end
+  appraise "rails-4.2.0" do
+    gem "rails", "4.2.0"
+  end
 
-appraise "rails-api-4.2.7" do
-  gem 'rails', '4.2.7.1'
-  gem  'rails-api', '0.4.0'
-  gem 'actionpack' , '4.2.7.1'
+  appraise "rails-api-4.2.7" do
+    gem 'rails', '4.2.7.1'
+    gem  'rails-api', '0.4.0'
+    gem 'actionpack' , '4.2.7.1'
+  end
 end
 
 appraise "rails-5.0.0" do
@@ -31,3 +33,13 @@ appraise "rails-5.0.1" do
   gem "rails", "5.0.1"
   gem 'rails-controller-testing'
 end
+
+appraise "rails-5.0.2" do
+  gem "rails", "5.0.2"
+  gem 'rails-controller-testing'
+end
+
+appraise "rails-5.1.0.rc1" do
+  gem "rails", "5.1.0.rc1"
+  gem 'rails-controller-testing'
+end
diff --git a/gemfiles/rails_5.0.1.gemfile b/gemfiles/rails_5.0.1.gemfile
new file mode 100755
index 0000000..6c0ba7b
--- /dev/null
+++ b/gemfiles/rails_5.0.1.gemfile
@@ -0,0 +1,9 @@
+# This file was generated by Appraisal
+
+source "http://rubygems.org"
+
+gem "wash_out", :github => "inossidabile/wash_out"
+gem "rails", "5.0.1"
+gem "rails-controller-testing"
+
+gemspec :path => "../"
diff --git a/gemfiles/rails_5.0.2.gemfile b/gemfiles/rails_5.0.2.gemfile
new file mode 100644
index 0000000..f946df1
--- /dev/null
+++ b/gemfiles/rails_5.0.2.gemfile
@@ -0,0 +1,9 @@
+# This file was generated by Appraisal
+
+source "http://rubygems.org"
+
+gem "wash_out", :github => "inossidabile/wash_out"
+gem "rails", "5.0.2"
+gem "rails-controller-testing"
+
+gemspec :path => "../"
diff --git a/gemfiles/rails_5.1.0.rc1.gemfile b/gemfiles/rails_5.1.0.rc1.gemfile
new file mode 100644
index 0000000..42ef234
--- /dev/null
+++ b/gemfiles/rails_5.1.0.rc1.gemfile
@@ -0,0 +1,9 @@
+# This file was generated by Appraisal
+
+source "http://rubygems.org"
+
+gem "wash_out", :github => "inossidabile/wash_out"
+gem "rails", "5.1.0.rc1"
+gem "rails-controller-testing"
+
+gemspec :path => "../"
diff --git a/lib/washout_builder/version.rb b/lib/washout_builder/version.rb
index 5cdf60d..f736e1d 100644
--- a/lib/washout_builder/version.rb
+++ b/lib/washout_builder/version.rb
@@ -12,7 +12,7 @@ module VERSION
     # the minor version of the gem
     MINOR = 7
     # the tiny version of the gem
-    TINY = 2
+    TINY = 3
     # if the version should be a prerelease
     PRE = nil
 
diff --git a/washout_builder.gemspec b/washout_builder.gemspec
index 56026d2..de47c28 100644
--- a/washout_builder.gemspec
+++ b/washout_builder.gemspec
@@ -1,3 +1,4 @@
+require 'date'
 require File.expand_path("../lib/washout_builder/version", __FILE__)
 
 Gem::Specification.new do |s|