diff --git a/.travis.yml b/.travis.yml
index 51bee40..279ee40 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,6 +26,10 @@ matrix:
     - rvm: "2.5"
       gemfile: gemfiles/rails42.gemfile
 
+    # Test Rails master against the latest stable version of Ruby
+    - rvm: "ruby"
+      gemfile: gemfiles/rails-master.gemfile
+
   exclude:
     - rvm: "2.3"
       gemfile: Gemfile
@@ -37,6 +41,7 @@ matrix:
       gemfile: gemfiles/rails60.gemfile
   allow_failures:
     - rvm: ruby-head
+    - gemfile: gemfiles/rails-master.gemfile
 
 before_install:
   # Use bundler 1.x with Rails 4.2
diff --git a/gemfiles/rails-master.gemfile b/gemfiles/rails-master.gemfile
new file mode 100644
index 0000000..f04aeb1
--- /dev/null
+++ b/gemfiles/rails-master.gemfile
@@ -0,0 +1,11 @@
+source "https://rubygems.org"
+
+gemspec path: ".."
+
+gem "rails", github: "rails/rails"
+
+group :test do
+  gem "aruba"
+  gem "codeclimate-test-reporter", "~> 1.0"
+  gem "rspec"
+end
diff --git a/interactor-rails.gemspec b/interactor-rails.gemspec
index 9f2dc87..2346b0e 100644
--- a/interactor-rails.gemspec
+++ b/interactor-rails.gemspec
@@ -15,7 +15,7 @@ Gem::Specification.new do |spec|
   spec.test_files = spec.files.grep(/^spec/)
 
   spec.add_dependency "interactor", "~> 3.0"
-  spec.add_dependency "rails", ">= 4.2", "< 6.1"
+  spec.add_dependency "rails", ">= 4.2"
 
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake"