diff --git a/oga.gemspec b/oga.gemspec
index 567e667..c0f4894 100644
--- a/oga.gemspec
+++ b/oga.gemspec
@@ -34,7 +34,7 @@ Gem::Specification.new do |s|
 
   s.add_dependency 'racc', ['~> 1.4', '>= 1.4.12']
   s.add_dependency 'ast'
-  s.add_dependency 'ruby-ll', '~> 2.0'
+  s.add_dependency 'ruby-ll', '~> 2.1'
 
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec', ['~> 3.0']