diff --git a/Gemfile.lock b/Gemfile.lock
index 6593b8e..0467083 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -49,7 +49,6 @@ DEPENDENCIES
   rspec (~> 3.0)
   rspec-github!
   rubocop (~> 1.12.0)
-  rubocop-ast (~> 1.4.0)
 
 BUNDLED WITH
    2.2.19
diff --git a/rspec-github.gemspec b/rspec-github.gemspec
index fa17aff..9f321e1 100644
--- a/rspec-github.gemspec
+++ b/rspec-github.gemspec
@@ -24,5 +24,4 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency 'rspec-core', '~> 3.0'
   spec.add_development_dependency 'rspec', '~> 3.0'
   spec.add_development_dependency 'rubocop', '~> 1.12.0'
-  spec.add_development_dependency 'rubocop-ast', '~> 1.4.0'
 end