diff --git a/rubocop.gemspec b/rubocop.gemspec
index 407caaac039..3a28d5a2800 100644
--- a/rubocop.gemspec
+++ b/rubocop.gemspec
@@ -35,7 +35,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency('parser', '>= 3.1.0.0')
   s.add_runtime_dependency('rainbow', '>= 2.2.2', '< 4.0')
   s.add_runtime_dependency('regexp_parser', '>= 1.8', '< 3.0')
-  s.add_runtime_dependency('rexml', '~> 3.2', '>= 3.2.5')
+  s.add_runtime_dependency('rexml', '>= 3.2.5', '< 4.0')
   s.add_runtime_dependency('rubocop-ast', '>= 1.17.0', '< 2.0')
   s.add_runtime_dependency('ruby-progressbar', '~> 1.7')
   s.add_runtime_dependency('unicode-display_width', '>= 1.4.0', '< 3.0')