diff --git a/.travis.yml b/.travis.yml
index 9f4a2c6..d86e7bb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@ cache: bundler
 
 rvm:
   # - 1.8.7
-  - 1.9.2
+  # - 1.9.2
   - 1.9.3
   - 2.0.0
   - 2.1
@@ -24,14 +24,6 @@ matrix:
     - rvm: rbx-2.2.1
     - rvm: jruby-19mode
   exclude:
-    - rvm: 1.8.7
-      gemfile: gemfiles/rails_4.0.gemfile
-    - rvm: 1.8.7
-      gemfile: gemfiles/rails_4.1.gemfile
-    - rvm: 1.9.2
-      gemfile: gemfiles/rails_4.0.gemfile
-    - rvm: 1.9.2
-      gemfile: gemfiles/rails_4.1.gemfile
     - rvm: 1.9.3
       gemfile: gemfiles/rails_4.1.gemfile
     - rvm: jruby-19mode
diff --git a/aasm.gemspec b/aasm.gemspec
index 5d401f6..3630d20 100644
--- a/aasm.gemspec
+++ b/aasm.gemspec
@@ -25,6 +25,8 @@ Gem::Specification.new do |s|
   # s.add_development_dependency 'mime-types', '~> 1.25' # needed by coveralls (>= 2.0 needs Ruby >=1.9.2)
   # s.add_development_dependency 'coveralls'
 
+  s.platform              = Gem::Platform::RUBY
+  # s.required_ruby_version = '>= 1.9.3'
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }