diff --git a/.travis.yml b/.travis.yml
index 773e409d..2a89dff6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,9 +2,9 @@ sudo: false
 language: ruby
 # Limit ruby versions to currently supported versions to avoid a big build matrix
 rvm:
-  - 2.2.7
-  - 2.3.4
-  - 2.4.1
+  - 2.2.9
+  - 2.3.6
+  - 2.4.3
 # Load database schema before rake
 before_script: bundle exec rake db:schema:load
 # Test on all supported rails versions
diff --git a/activeadmin-globalize.gemspec b/activeadmin-globalize.gemspec
index ca5a02ab..613572a9 100644
--- a/activeadmin-globalize.gemspec
+++ b/activeadmin-globalize.gemspec
@@ -11,12 +11,12 @@ Gem::Specification.new do |s|
   s.email       = ['stefano.verna@gmail.com', 'f.napoleoni@gmail.com']
   s.homepage    = 'http://github.com/fabn/activeadmin-globalize'
   s.summary     = 'Handles globalize translations'
-  s.description = 'Handles globalize translations in ActiveAdmin 1.0 and Rails 4.x-5.x'
+  s.description = 'Handles globalize translations in ActiveAdmin 1.x and Rails 4.x-5.x'
 
   s.files = Dir['{app,config,db,lib}/**/*'] + %w(MIT-LICENSE README.md)
 
-  s.add_dependency 'activeadmin', '>= 1.0', '< 1.2'
-  # Try to support rails from 3.2 up to 4.2.x
+  s.add_dependency 'activeadmin', '>= 1.0', '< 1.3'
+  # Try to support rails from 3.2 up to 5.x
   s.add_dependency 'globalize', '>= 3.1.0', '< 6.0'
 
   # development dependencies