diff --git a/Gemfile b/Gemfile
index 53b13c7f..49dc7923 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,6 +12,10 @@ gem 'simplecov', '~> 0.21.0'
 gem 'simplecov-lcov', '~> 0.8.0'
 
 # Pin RuboCop for CI builds
-gem 'rubocop', '1.59.0'
+if RUBY_VERSION < '2.7.0'
+  gem 'rubocop', '1.50.0'
+else
+  gem 'rubocop', '1.59.0'
+end
 
 gem 'ffi' if Gem.win_platform?