diff --git a/changelog/new_support_ruby_3_1_parser.md b/changelog/new_support_ruby_3_1_parser.md
new file mode 100644
index 000000000..b3d93f4db
--- /dev/null
+++ b/changelog/new_support_ruby_3_1_parser.md
@@ -0,0 +1 @@
+* [#182](https://github.com/rubocop-hq/rubocop-ast/pull/182): Support `Parser::Ruby31` for Ruby 3.1 parser (experimental). ([@koic][])
diff --git a/lib/rubocop/ast/processed_source.rb b/lib/rubocop/ast/processed_source.rb
index 566e5d343..558038461 100644
--- a/lib/rubocop/ast/processed_source.rb
+++ b/lib/rubocop/ast/processed_source.rb
@@ -236,6 +236,9 @@ def parser_class(ruby_version)
         when 2.8, 3.0
           require 'parser/ruby30'
           Parser::Ruby30
+        when 3.1
+          require 'parser/ruby31'
+          Parser::Ruby31
         else
           raise ArgumentError,
                 "RuboCop found unknown Ruby version: #{ruby_version.inspect}"
diff --git a/rubocop-ast.gemspec b/rubocop-ast.gemspec
index 607954c68..2151cf112 100644
--- a/rubocop-ast.gemspec
+++ b/rubocop-ast.gemspec
@@ -32,7 +32,7 @@ Gem::Specification.new do |s|
     'bug_tracker_uri' => 'https://github.com/rubocop-hq/rubocop-ast/issues'
   }
 
-  s.add_runtime_dependency('parser', '>= 2.7.1.5')
+  s.add_runtime_dependency('parser', '>= 3.0.1.1')
 
   s.add_development_dependency('bundler', '>= 1.15.0', '< 3.0')
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index e2a06b840..e9ae3db95 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -43,6 +43,10 @@
   let(:ruby_version) { 3.0 }
 end
 
+RSpec.shared_context 'ruby 3.1', :ruby31 do
+  let(:ruby_version) { 3.1 }
+end
+
 # ...
 module DefaultRubyVersion
   extend RSpec::SharedContext