diff --git a/.ruby-version b/.ruby-version
deleted file mode 100644
index 73462a5a13..0000000000
--- a/.ruby-version
+++ /dev/null
@@ -1 +0,0 @@
-2.5.1
diff --git a/.travis.yml b/.travis.yml
index a8bece6a98..f9ad1f699e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,10 +2,17 @@ language: ruby
 sudo: false
 
 rvm:
-  - 2.2
+  - 2.4.4
+  - 2.5.1
+  - ruby-head
 
 cache:
   bundler: true
 
+matrix:
+  allow_failures:
+    - rvm: ruby-head
+  fast_finish: true
+
 script:
   - bundle exec rake
diff --git a/actiontext.gemspec b/actiontext.gemspec
index d9de924efa..1185dfc791 100644
--- a/actiontext.gemspec
+++ b/actiontext.gemspec
@@ -13,7 +13,7 @@ Gem::Specification.new do |s|
   s.homepage = "https://github.com/rails/actiontext"
   s.license  = "MIT"
 
-  s.required_ruby_version = ">= 2.2.2"
+  s.required_ruby_version = ">= 2.4.1"
 
   s.add_dependency "rails", ">= 5.2.0"
   s.add_dependency "nokogiri"