diff --git a/changelog/change_update_parser_gem_to_3121.md b/changelog/change_update_parser_gem_to_3121.md
new file mode 100644
index 00000000000..6899e9c831e
--- /dev/null
+++ b/changelog/change_update_parser_gem_to_3121.md
@@ -0,0 +1 @@
+* [#10773](https://github.com/rubocop/rubocop/issues/10773): Require Parser 3.1.2.1 or higher. ([@dvandersluis][])
diff --git a/rubocop.gemspec b/rubocop.gemspec
index 0146ac7aaed..d0977aa4ff9 100644
--- a/rubocop.gemspec
+++ b/rubocop.gemspec
@@ -33,7 +33,7 @@ Gem::Specification.new do |s|
 
   s.add_runtime_dependency('json', '~> 2.3')
   s.add_runtime_dependency('parallel', '~> 1.10')
-  s.add_runtime_dependency('parser', '>= 3.1.0.0')
+  s.add_runtime_dependency('parser', '>= 3.1.2.1')
   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', '>= 3.2.5', '< 4.0')