diff --git a/modules/openapi-generator/src/main/resources/ruby-client/rubocop.mustache b/modules/openapi-generator/src/main/resources/ruby-client/rubocop.mustache
index 98c7e3c7e51..e9f19c082d9 100644
--- a/modules/openapi-generator/src/main/resources/ruby-client/rubocop.mustache
+++ b/modules/openapi-generator/src/main/resources/ruby-client/rubocop.mustache
@@ -1,7 +1,7 @@
 # This file is based on https://github.com/rails/rails/blob/master/.rubocop.yml (MIT license)
 # Automatically generated by OpenAPI Generator (https://openapi-generator.tech)
 AllCops:
-  TargetRubyVersion: 2.2
+  TargetRubyVersion: 2.4
   # RuboCop has a bunch of cops enabled by default. This setting tells RuboCop
   # to ignore them, so only the ones explicitly set in this file are enabled.
   DisabledByDefault: true
diff --git a/samples/client/petstore/ruby/.rubocop.yml b/samples/client/petstore/ruby/.rubocop.yml
index 98c7e3c7e51..e9f19c082d9 100644
--- a/samples/client/petstore/ruby/.rubocop.yml
+++ b/samples/client/petstore/ruby/.rubocop.yml
@@ -1,7 +1,7 @@
 # This file is based on https://github.com/rails/rails/blob/master/.rubocop.yml (MIT license)
 # Automatically generated by OpenAPI Generator (https://openapi-generator.tech)
 AllCops:
-  TargetRubyVersion: 2.2
+  TargetRubyVersion: 2.4
   # RuboCop has a bunch of cops enabled by default. This setting tells RuboCop
   # to ignore them, so only the ones explicitly set in this file are enabled.
   DisabledByDefault: true
diff --git a/samples/openapi3/client/petstore/ruby/.rubocop.yml b/samples/openapi3/client/petstore/ruby/.rubocop.yml
index 98c7e3c7e51..e9f19c082d9 100644
--- a/samples/openapi3/client/petstore/ruby/.rubocop.yml
+++ b/samples/openapi3/client/petstore/ruby/.rubocop.yml
@@ -1,7 +1,7 @@
 # This file is based on https://github.com/rails/rails/blob/master/.rubocop.yml (MIT license)
 # Automatically generated by OpenAPI Generator (https://openapi-generator.tech)
 AllCops:
-  TargetRubyVersion: 2.2
+  TargetRubyVersion: 2.4
   # RuboCop has a bunch of cops enabled by default. This setting tells RuboCop
   # to ignore them, so only the ones explicitly set in this file are enabled.
   DisabledByDefault: true