diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..c9d7a4c
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,12 @@
+language: ruby
+rvm:
+  - ruby-head
+  - 2.7
+  - 2.6
+  - 2.5
+  - 2.4
+  - 2.3
+  - 2.2
+matrix:
+  allow_failures:
+    - rvm: ruby-head
diff --git a/Rakefile b/Rakefile
index 0811fba..c94cb81 100644
--- a/Rakefile
+++ b/Rakefile
@@ -2,6 +2,8 @@ require "bundler/gem_tasks"
 
 require 'rake/testtask'
 
+task :default => :test
+
 Rake::TestTask.new do |t|
   t.pattern = "test/**/*_test.rb"
 end
diff --git a/lru_redux.gemspec b/lru_redux.gemspec
index 852b670..f6063e6 100644
--- a/lru_redux.gemspec
+++ b/lru_redux.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test)/})
   spec.require_paths = ["lib"]
 
-  spec.add_development_dependency "bundler", "~> 1.3"
+  spec.add_development_dependency "bundler", ">= 1.3"
   spec.add_development_dependency "rake"
   spec.add_development_dependency "minitest"
   spec.add_development_dependency "guard-minitest"