diff --git a/rubocop-ast.gemspec b/rubocop-ast.gemspec
index b8c26a391..7a524d916 100644
--- a/rubocop-ast.gemspec
+++ b/rubocop-ast.gemspec
@@ -15,7 +15,7 @@ Gem::Specification.new do |s|
 
   s.email = 'rubocop@googlegroups.com'
   s.files = `git ls-files lib LICENSE.txt README.md`
-            .split($RS) + %w[
+            .lines(chomp: true) + %w[
               lib/rubocop/ast/node_pattern/parser.racc.rb
               lib/rubocop/ast/node_pattern/lexer.rex.rb
             ]