diff --git a/Gemfile b/Gemfile
index b3710ae..8fffc7a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,9 +17,9 @@ ruby_version_segments = Gem::Version.new(RUBY_VERSION.dup).segments
 minor_version = ruby_version_segments[0..1].join('.')
 
 group :development do
-  gem "json", '= 2.7.2',                                         require: false if Gem::Requirement.create('~> 2.4.2').satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "json", '= 2.7.2',                                         require: false if Gem::Requirement.create(['>= 2.5.0', '< 2.7.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
-  gem "json", '= 2.7.2',                                         require: false if Gem::Requirement.create(['>= 2.7.0', '< 2.8.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.9.1',                                         require: false if Gem::Requirement.create('~> 2.4.2').satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.9.1',                                         require: false if Gem::Requirement.create(['>= 2.5.0', '< 2.7.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.9.1',                                         require: false if Gem::Requirement.create(['>= 2.7.0', '< 2.8.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
   gem "puppet-module-posix-default-r#{minor_version}", '~> 1.0', require: false, platforms: [:ruby]
   gem "puppet-module-posix-dev-r#{minor_version}", '~> 1.0',     require: false, platforms: [:ruby]
   gem "puppet-module-win-default-r#{minor_version}", '~> 1.0',   require: false, platforms: [:mswin, :mingw, :x64_mingw]