diff --git a/.github/workflows/ruby_test.yml b/.github/workflows/ruby_test.yml
index 6471a3f..fac765f 100644
--- a/.github/workflows/ruby_test.yml
+++ b/.github/workflows/ruby_test.yml
@@ -12,12 +12,20 @@ jobs:
     name: Rspec
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+      matrix:
+        # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
+        ruby: [ "3.0", "3.1", "3.2", "3.3", "3.4", "4.0" ]
     steps:
       - name: Checkout Repository
         uses: sanger/.github/.github/actions/setup/checkout@master
 
-      - name: Setup Ruby
-        uses: sanger/.github/.github/actions/setup/ruby@master
+      - name: Setup Ruby ${{ matrix.ruby }}
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
 
       - name: Run rspec
         run: bundle exec rspec
@@ -25,7 +33,7 @@ jobs:
       - name: Upload coverage reports to Codecov
         uses: sanger/.github/.github/actions/tests/codecov@master
         with:
-          name: ${{ github.run_id }}_${{ github.job }}_${{ github.event_name }}
+          name: ${{ github.run_id }}_${{ github.job }}_${{ github.event_name }}_${{ matrix.ruby }}
           token: ${{ secrets.CODECOV_TOKEN }}
           flags: ${{ github.event_name }}
           disable-search: true
diff --git a/.rubocop.yml b/.rubocop.yml
index c29e870..bde0f27 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,7 +1,5 @@
 ---
 
-inherit_from: ".rubocop_todo.yml"
-
 # The behaviour of RuboCop can be controlled via the .rubocop.yml
 # configuration file. It makes it possible to enable/disable
 # certain cops (checks) and to alter their behaviour if they accept
@@ -13,12 +11,15 @@ inherit_from: ".rubocop_todo.yml"
 #
 # See https://docs.rubocop.org/rubocop/latest/configuration.html
 
+inherit_from: ".rubocop_todo.yml"
+
 plugins:
 - rubocop-rake
 - rubocop-rspec
 
 AllCops:
   NewCops: enable
+  TargetRubyVersion: 3.0
 
 Gemspec/DevelopmentDependencies:
   EnforcedStyle: gemspec
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 601fba3..7ff2a52 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2026-04-29 17:06:59 UTC using RuboCop version 1.86.1.
+# on 2026-04-29 18:48:04 UTC using RuboCop version 1.86.1.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -12,13 +12,6 @@ Gemspec/RequireMFA:
   Exclude:
     - 'record_loader.gemspec'
 
-# Offense count: 1
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: MinBodyLength, AllowConsecutiveConditionals.
-Style/GuardClause:
-  Exclude:
-    - 'record_loader.gemspec'
-
 # Offense count: 3
 # This cop supports unsafe autocorrection (--autocorrect-all).
 Style/ReduceToHash:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ba89a46..456086b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,16 +1,29 @@
 # Changelog
 
 Keeps track of notable changes. Please remember to add new behaviours to the
-Unreleased section to make new releases easy.
+Unreleased section to make new releases easy.  
+Follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/) and [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.0.0]
+
+- [Changed] Version numbering to follow [Ruby Gem versioning guidelines](https://guides.rubygems.org/patterns/)
+- [Changed] Explicitly require and use Psych gem for YAML parsing
+- [Added] Add support for Ruby 3.1 - 4.0
+- [Documentation] Update documentation to reflect changes in versioning and supported Ruby versions
+
+## [0.3.0]
+
+- [Breaking] Remove support for Ruby 2.5
+- [Added] Add support for Ruby 3.0
 
 ## [0.2.0]
 
 - [Added] `RecordLoader.export_attributes` for easy generation of yaml from
-           existing data
+  existing data
 - [Added] Improved feedback if exceptions raised during record creation
 - [Added] Improved templated yml files to use attributes from table
 - [Changed] Update name of yaml files generated as part of tests.
-            No changes are required to existing loaders.
+  No changes are required to existing loaders.
 - [Fixed] Default yaml files correctly templated
 
 ## [0.1.1]
diff --git a/Gemfile.lock b/Gemfile.lock
index 3196b27..6b85389 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,8 @@
 PATH
   remote: .
   specs:
-    record_loader (0.3.0)
+    record_loader (1.0.0)
+      psych (~> 3.0)
 
 GEM
   remote: https://rubygems.org/
@@ -13,7 +14,11 @@ GEM
     json (2.19.4)
     language_server-protocol (3.17.0.5)
     lint_roller (1.1.0)
+    logger (1.7.0)
+    mdtoc (0.3.1)
+      sorbet-runtime
     method_source (1.0.0)
+    ostruct (0.6.3)
     parallel (1.28.0)
     parser (3.3.11.1)
       ast (~> 2.4.1)
@@ -22,6 +27,7 @@ GEM
     pry (0.14.2)
       coderay (~> 1.1)
       method_source (~> 1.0)
+    psych (3.3.4)
     racc (1.8.1)
     rainbow (3.1.1)
     rake (13.0.6)
@@ -67,6 +73,7 @@ GEM
     simplecov-html (0.13.2)
     simplecov-lcov (0.9.0)
     simplecov_json_formatter (0.1.4)
+    sorbet-runtime (0.6.13169)
     unicode-display_width (3.2.0)
       unicode-emoji (~> 4.1)
     unicode-emoji (4.2.0)
@@ -76,7 +83,10 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  bundler (~> 2.3)
+  bundler (~> 2.5)
+  logger (~> 1.7)
+  mdtoc (~> 0.3.1)
+  ostruct (~> 0.6.3)
   pry (~> 0.14)
   rake (~> 13.0)
   record_loader!
@@ -89,4 +99,4 @@ DEPENDENCIES
   yard (~> 0.9)
 
 BUNDLED WITH
-   2.3.21
+   2.5.9
diff --git a/README.md b/README.md
index 93b1f75..c74d5f7 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,28 @@ your production and development environments.
 
 While written with ActiveRecord/Rails in mind, it is possible to use RecordLoader in different environments.
 
+<!-- mdtoc -->
+* [RecordLoader](README.md#recordloader)
+  * [Key features](README.md#key-features)
+  * [Version compatibility](README.md#version-compatibility)
+  * [Installation](README.md#installation)
+  * [How to run](README.md#how-to-run)
+  * [How to generate new records loaders for your project (Rails)](README.md#how-to-generate-new-records-loaders-for-your-project-rails)
+    * [An example loader](README.md#an-example-loader)
+  * [Dev and Wip files](README.md#dev-and-wip-files)
+  * [RecordLoader Dependencies](README.md#recordloader-dependencies)
+  * [Triggering on deployment](README.md#triggering-on-deployment)
+    * [Within Sanger PSD](README.md#within-sanger-psd)
+  * [Non Rails Environments](README.md#non-rails-environments)
+  * [Development](README.md#development)
+    * [Setup](README.md#setup)
+    * [Testing](README.md#testing)
+    * [Releasing](README.md#releasing)
+  * [Contributing](README.md#contributing)
+  * [License](README.md#license)
+  * [Updating the table of contents](README.md#updating-the-table-of-contents)
+<!-- mdtoc-end -->
+
 ## Key features
 
 - Produce testable, reproducible data migrations across multiple environments
@@ -18,6 +40,24 @@ While written with ActiveRecord/Rails in mind, it is possible to use RecordLoade
 - Keep work-in-progress isolated with .wip.yml files
 - Rails generators to quickly create new record loaders
 
+## Version compatibility
+
+If using with Rails:
+
+| Rails Version | RecordLoader Version |
+| ------------- | -------------------- |
+| 6.x and below | 0.3.0\*, 1.0.0       |
+
+_\* Pin psych < 4_
+
+If using with Ruby directly:
+
+| Ruby Version | RecordLoader Version |
+| ------------ | -------------------- |
+| 4.x          | 1.x                  |
+| 3.x          | 0.3.0, 1.x           |
+| 2.5 - 2.7    | 0.2.0                |
+
 ## Installation
 
 Add this line to your application's Gemfile:
@@ -82,62 +122,62 @@ Suppose you want to create a loader to maintain a selection of product types. Yo
 
 This will create several files:
 
-#### `lib/tasks/record_loader.rake`
+- `lib/tasks/record_loader.rake`
 
-Adds the record_loader:all rake task which can be used to trigger all record loaders.
+  Adds the record_loader:all rake task which can be used to trigger all record loaders.
 
-#### `lib/record_loader/application_record_loader.rb`
+- `lib/record_loader/application_record_loader.rb`
 
-Application specific base class for customization.
+  Application specific base class for customization.
 
-#### `config/record_loader/product_types/default_records.yml`
+- `config/record_loader/product_types/default_records.yml`
 
-Example yaml file to begin populating with your record information. Record Loaders will load all yaml files from within
-this directory, so it is possible to separate your records into multiple different files for better organization.
-In addition yaml files ending in `.dev.yml` and `.wip.yml` exhibit special behaviour.
-See [dev and wip files](#dev-and-wip).
+  Example yaml file to begin populating with your record information. Record Loaders will load all yaml files from within
+  this directory, so it is possible to separate your records into multiple different files for better organization.
+  In addition yaml files ending in `.dev.yml` and `.wip.yml` exhibit special behaviour.
+  See [dev and wip files](#dev-and-wip).
 
-#### `lib/record_loader/product_type_loader.rb`
+- `lib/record_loader/product_type_loader.rb`
 
-The actual loader. It will look something like this:
+  The actual loader. It will look something like this:
 
-```ruby
-# frozen_string_literal: true
-# This file was automatically generated via `rails g record_loader`
-
-# RecordLoader handles automatic population and updating of database records
-# across different environments
-# @see https://rubydoc.info/github/sanger/record_loader/
-module RecordLoader
-  # Creates the specified plate types if they are not present
-  class ProductTypeLoader < ApplicationRecordLoader
-    config_folder 'product_types'
-
-    def create_or_update!(name, options)
-      ProductType.create_with(options).find_or_create_by!(name: name)
+  ```ruby
+  # frozen_string_literal: true
+  # This file was automatically generated via `rails g record_loader`
+
+  # RecordLoader handles automatic population and updating of database records
+  # across different environments
+  # @see https://rubydoc.info/github/sanger/record_loader/
+  module RecordLoader
+    # Creates the specified plate types if they are not present
+    class ProductTypeLoader < ApplicationRecordLoader
+      config_folder 'product_types'
+
+      def create_or_update!(name, options)
+        ProductType.create_with(options).find_or_create_by!(name: name)
+      end
     end
   end
-end
-```
+  ```
 
-The `config_folder` specifies which directory under `config/record_loader` will be used to source the yaml files.
-The method `create_or_update!` will create the actual records, and should be idempotent (ie. calling it multiple times will
-have the same effect as calling it once). `create_or_update!` will be called once for each entry in the yaml files,
-with the first argument being the key, and the second argument being the value, usually a hash of options.
+  The `config_folder` specifies which directory under `config/record_loader` will be used to source the yaml files.
+  The method `create_or_update!` will create the actual records, and should be idempotent (ie. calling it multiple times will
+  have the same effect as calling it once). `create_or_update!` will be called once for each entry in the yaml files,
+  with the first argument being the key, and the second argument being the value, usually a hash of options.
 
-#### `lib/record_loader/tasks/record_loader/product_type.rake`
+- `lib/record_loader/tasks/record_loader/product_type.rake`
 
-This contains the `record_loader:product_type` which will trigger the record loader, and also ensures that
-`record_loader:product_type` will get invoked on calling `record_loader:all`.
+  This contains the `record_loader:product_type` which will trigger the record loader, and also ensures that
+  `record_loader:product_type` will get invoked on calling `record_loader:all`.
 
-#### `spec/data/record_loader/product_types/product_types_basic.yml`
+- `spec/data/record_loader/product_types/product_types_basic.yml`
 
-A basic configuration for testing the loader. Tests use a separate directory to avoid coupling your specs to the data.
+  A basic configuration for testing the loader. Tests use a separate directory to avoid coupling your specs to the data.
 
-#### `spec/lib/record_loader/product_type_loader_spec.rb`
+- `spec/lib/record_loader/product_type_loader_spec.rb`
 
-A basic rspec spec file for testing your loader. By default this just confirms that your loader creates the
-expected number of records, and that it is idempotent.
+  A basic rspec spec file for testing your loader. By default this just confirms that your loader creates the
+  expected number of records, and that it is idempotent.
 
 ## Dev and Wip files
 
@@ -206,11 +246,20 @@ See {RecordLoader::Adapter} for information about custom adapters.
 
 ## Development
 
-After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can
-also run `bin/console` for an interactive prompt that will allow you to experiment.
+### Setup
+
+After checking out the repo, run `bin/setup` to install dependencies.
+
+### Testing
+
+Then, run `bundle rspec` to run the unit tests.
+You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+To install this gem onto your local machine, run `bundle exec rake install`.
 
-To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the
-version number in `version.rb`, ensure the CHANGELOG.md is updated and that everything is committed.
+### Releasing
+
+To release a new version, update the version number in `version.rb`, ensure the CHANGELOG.md is updated
+and that everything is committed.
 Then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push
 the `.gem` file to [rubygems.org](https://rubygems.org).
 
@@ -221,3 +270,12 @@ Bug reports and pull requests are welcome on GitHub at <https://github.com/sange
 ## License
 
 The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
+
+## Updating the table of contents
+
+After updating this README, please update the table of contents.
+To do this automatically with the [mdtoc](https://github.com/andornaut/mdtoc) gem, run:
+
+```shell
+bundle exec mdtoc -o README.md README.md
+```
diff --git a/lib/record_loader/base.rb b/lib/record_loader/base.rb
index 6b81774..470ae6c 100644
--- a/lib/record_loader/base.rb
+++ b/lib/record_loader/base.rb
@@ -133,7 +133,7 @@ def default_path
     #
     def load_config
       @config = @files.each_with_object({}) do |file, store|
-        latest_file = YAML.load_file(file)
+        latest_file = Psych.load_file(file)
         duplicate_keys = store.keys & latest_file.keys
         adapter.logger.warn "Duplicate keys in #{@path}: #{duplicate_keys}" unless duplicate_keys.empty?
         store.merge!(latest_file)
diff --git a/lib/record_loader/version.rb b/lib/record_loader/version.rb
index cbdeefc..75d5eae 100644
--- a/lib/record_loader/version.rb
+++ b/lib/record_loader/version.rb
@@ -2,5 +2,5 @@
 
 module RecordLoader
   # @return [String] The current sem-ver version number
-  VERSION = '0.3.0'
+  VERSION = '1.0.0'
 end
diff --git a/record_loader.gemspec b/record_loader.gemspec
index 743cb26..047acd5 100644
--- a/record_loader.gemspec
+++ b/record_loader.gemspec
@@ -1,46 +1,47 @@
 # frozen_string_literal: true
 
-lib = File.expand_path('lib', __dir__)
-$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
-require 'record_loader/version'
+require_relative 'lib/record_loader/version'
 
 Gem::Specification.new do |spec|
   spec.name          = 'record_loader'
   spec.version       = RecordLoader::VERSION
-  spec.authors       = ['James Glover']
-  spec.email         = ['james.glover@sanger.ac.uk']
+  spec.authors       = ['Sanger - Production Software Development']
+  spec.email         = ['psd@sanger.ac.uk']
 
   spec.summary       = 'Easily manage seeding and updating data from simple yml files'
   spec.description   = 'Provides a simple interface for generating and maintaining database
                         records across multiple environments in a simple and reproducible manner.'
-  spec.homepage      = 'https://www.github.com/sanger/record_loader'
+  spec.homepage      = 'https://github.com/sanger/record_loader'
   spec.license       = 'MIT'
 
   spec.required_ruby_version = '>= 3.0.6'
 
   # Prevent pushing this gem to RubyGems.org. To allow pushes either set the 'allowed_push_host'
   # to allow pushing to a single host or delete this section to allow pushing to any host.
-  if spec.respond_to?(:metadata)
-    # spec.metadata["allowed_push_host"] = "TODO: Set to 'http://mygemserver.com'"
-
-    spec.metadata['homepage_uri'] = spec.homepage
-    spec.metadata['source_code_uri'] = 'https://www.github.com/sanger/record_loader'
-    # spec.metadata["changelog_uri"] = "TODO: Put your gem's CHANGELOG.md URL here."
-  else
-    raise 'RubyGems 2.0 or newer is required to protect against public gem pushes.'
-  end
+  # spec.metadata['allowed_push_host'] = "TODO: Set to your gem server 'https://example.com'"
+
+  spec.metadata['homepage_uri']     = spec.homepage
+  spec.metadata['source_code_uri']  = 'https://github.com/sanger/record_loader'
+  spec.metadata['changelog_uri']    = 'https://github.com/sanger/record_loader/blob/master/CHANGELOG.md'
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
-  spec.files = Dir.chdir(File.expand_path(__dir__)) do
-    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  spec.files = Dir.chdir(__dir__) do
+    `git ls-files -z`.split("\x0").reject do |f|
+      (f == __FILE__) || f.match(%r{\A(?:(?:bin|test|spec|features)/|\.(?:git|travis|circleci)|appveyor)})
+    end
   end
   spec.bindir        = 'exe'
-  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.executables   = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
+  spec.add_dependency 'psych', '~> 3.0'
+
   # Development dependencies
-  spec.add_development_dependency 'bundler', '~> 2.3'
+  spec.add_development_dependency 'bundler', '~> 2.5'
+  spec.add_development_dependency 'logger', '~> 1.7'
+  spec.add_development_dependency 'mdtoc', '~> 0.3.1'
+  spec.add_development_dependency 'ostruct', '~> 0.6.3'
   spec.add_development_dependency 'pry', '~> 0.14'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'rspec', '~> 3.12'
@@ -50,4 +51,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'simplecov', '~> 0.22'
   spec.add_development_dependency 'simplecov-lcov', '~> 0.9'
   spec.add_development_dependency 'yard', '~> 0.9'
+
+  # For more information and examples about making a new gem, check out our
+  # guide at: https://bundler.io/guides/creating_gem.html
 end