diff --git a/.sync.yml b/.sync.yml
index f87f1b51..c4abec5f 100644
--- a/.sync.yml
+++ b/.sync.yml
@@ -11,6 +11,7 @@ Gemfile:
     ":development":
     - gem: ruby-pwsh
     - gem: github_changelog_generator
+      version: '= 1.15.2'
     ":system_tests":
     - gem: rspec-retry
 Rakefile:
diff --git a/Gemfile b/Gemfile
index dc07f4b9..3f753291 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,6 +14,11 @@ def location_for(place_or_version, fake_version = nil)
 end
 
 group :development do
+  gem "json", '= 2.1.0',                               require: false if Gem::Requirement.create(['>= 2.5.0', '< 2.7.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.3.0',                               require: false if Gem::Requirement.create(['>= 2.7.0', '< 3.0.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.5.1',                               require: false if Gem::Requirement.create(['>= 3.0.0', '< 3.0.5']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.6.1',                               require: false if Gem::Requirement.create(['>= 3.1.0', '< 3.1.3']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
+  gem "json", '= 2.6.3',                               require: false if Gem::Requirement.create(['>= 3.2.0', '< 4.0.0']).satisfied_by?(Gem::Version.new(RUBY_VERSION.dup))
   gem "voxpupuli-puppet-lint-plugins", '~> 3.1',       require: false
   gem "facterdb", '~> 1.18',                           require: false
   gem "metadata-json-lint", '>= 2.0.2', '< 4.0.0',     require: false
@@ -30,7 +35,7 @@ group :development do
   gem "rubocop-rspec", '= 2.0.1',                      require: false
   gem "rb-readline", '= 0.5.5',                        require: false, platforms: [:mswin, :mingw, :x64_mingw]
   gem "ruby-pwsh",                                     require: false
-  gem "github_changelog_generator",                    require: false
+  gem "github_changelog_generator", '= 1.15.2',        require: false
 end
 group :system_tests do
   gem "puppet_litmus", '< 1.0.0', require: false, platforms: [:ruby]
diff --git a/metadata.json b/metadata.json
index 49f02269..5e32781d 100644
--- a/metadata.json
+++ b/metadata.json
@@ -62,7 +62,7 @@
       "version_requirement": ">= 6.24.0 < 8.0.0"
     }
   ],
-  "pdk-version": "2.5.0",
+  "pdk-version": "2.6.0",
   "template-url": "https://github.com/puppetlabs/pdk-templates.git#main",
-  "template-ref": "heads/main-0-g7f9e189"
+  "template-ref": "heads/main-0-g434e063"
 }