diff --git a/modules/openapi-generator/src/main/resources/ruby-client/gemspec.mustache b/modules/openapi-generator/src/main/resources/ruby-client/gemspec.mustache
index 06334b127cb7..ea84291d48c4 100644
--- a/modules/openapi-generator/src/main/resources/ruby-client/gemspec.mustache
+++ b/modules/openapi-generator/src/main/resources/ruby-client/gemspec.mustache
@@ -16,16 +16,11 @@ Gem::Specification.new do |s|
   s.homepage    = "{{gemHomepage}}{{^gemHomepage}}https://openapi-generator.tech{{/gemHomepage}}"
   s.summary     = "{{gemSummary}}{{^gemSummary}}{{{appName}}} Ruby Gem{{/gemSummary}}"
   s.description = "{{gemDescription}}{{^gemDescription}}{{{appDescription}}}{{^appDescription}}{{{appName}}} Ruby Gem{{/appDescription}}{{/gemDescription}}"
-  {{#gemLicense}}
-  s.license     = '{{{gemLicense}}}'
-  {{/gemLicense}}
-  {{^gemLicense}}
-  s.license     = "Unlicense"
-  {{/gemLicense}}
-  s.required_ruby_version = "{{{gemRequiredRubyVersion}}}{{^gemRequiredRubyVersion}}>= 1.9{{/gemRequiredRubyVersion}}"
+  s.license     = "{{{gemLicense}}}{{^gemLicense}}Unlicense{{/gemLicense}}"
+  s.required_ruby_version = "{{{gemRequiredRubyVersion}}}{{^gemRequiredRubyVersion}}>= 2.4{{/gemRequiredRubyVersion}}"
 
   {{#isFaraday}}
-  s.add_runtime_dependency 'faraday', '>= 0.14.0'
+  s.add_runtime_dependency 'faraday', '~> 1.0', '>= 1.0.1'
   {{/isFaraday}}
   {{^isFaraday}}
   s.add_runtime_dependency 'typhoeus', '~> 1.0', '>= 1.0.1'
diff --git a/samples/client/petstore/ruby-faraday/petstore.gemspec b/samples/client/petstore/ruby-faraday/petstore.gemspec
index 8a77cf9fc5ce..b38dd31ced04 100644
--- a/samples/client/petstore/ruby-faraday/petstore.gemspec
+++ b/samples/client/petstore/ruby-faraday/petstore.gemspec
@@ -25,9 +25,9 @@ Gem::Specification.new do |s|
   s.summary     = "OpenAPI Petstore Ruby Gem"
   s.description = "This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\"
   s.license     = "Unlicense"
-  s.required_ruby_version = ">= 1.9"
+  s.required_ruby_version = ">= 2.4"
 
-  s.add_runtime_dependency 'faraday', '>= 0.14.0'
+  s.add_runtime_dependency 'faraday', '~> 1.0', '>= 1.0.1'
 
   s.add_development_dependency 'rspec', '~> 3.6', '>= 3.6.0'
 
diff --git a/samples/client/petstore/ruby/petstore.gemspec b/samples/client/petstore/ruby/petstore.gemspec
index 75e36fd2835f..18b55cd52be5 100644
--- a/samples/client/petstore/ruby/petstore.gemspec
+++ b/samples/client/petstore/ruby/petstore.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
   s.summary     = "OpenAPI Petstore Ruby Gem"
   s.description = "This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\"
   s.license     = "Unlicense"
-  s.required_ruby_version = ">= 1.9"
+  s.required_ruby_version = ">= 2.4"
 
   s.add_runtime_dependency 'typhoeus', '~> 1.0', '>= 1.0.1'
 
diff --git a/samples/openapi3/client/features/dynamic-servers/ruby/dynamic_servers.gemspec b/samples/openapi3/client/features/dynamic-servers/ruby/dynamic_servers.gemspec
index 49a00250e3b1..f8efeaf8a060 100644
--- a/samples/openapi3/client/features/dynamic-servers/ruby/dynamic_servers.gemspec
+++ b/samples/openapi3/client/features/dynamic-servers/ruby/dynamic_servers.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
   s.summary     = "OpenAPI Extension with dynamic servers Ruby Gem"
   s.description = "This specification shows how to use dynamic servers."
   s.license     = "Unlicense"
-  s.required_ruby_version = ">= 1.9"
+  s.required_ruby_version = ">= 2.4"
 
   s.add_runtime_dependency 'typhoeus', '~> 1.0', '>= 1.0.1'
 
diff --git a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/petstore.gemspec b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/petstore.gemspec
index b1bd56ee5749..618a5be95b49 100644
--- a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/petstore.gemspec
+++ b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/petstore.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
   s.summary     = "OpenAPI Extension generating aliases to maps and arrays as models Ruby Gem"
   s.description = "This specification shows how to generate aliases to maps and arrays as models."
   s.license     = "Unlicense"
-  s.required_ruby_version = ">= 1.9"
+  s.required_ruby_version = ">= 2.4"
 
   s.add_runtime_dependency 'typhoeus', '~> 1.0', '>= 1.0.1'