diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index feea55a..41caaae 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -22,7 +22,7 @@ jobs:
           bump-patch-for-minor-pre-major: true
 
       - if: ${{ steps.release.outputs.release_created }}
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - if: ${{ steps.release.outputs.release_created }}
         name: Set up Ruby
diff --git a/.github/workflows/update-database.yml b/.github/workflows/update-database.yml
index fa737d4..37fbc57 100644
--- a/.github/workflows/update-database.yml
+++ b/.github/workflows/update-database.yml
@@ -12,7 +12,7 @@ jobs:
     name: Update BSB Database & Version
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
@@ -21,13 +21,10 @@ jobs:
         run: bundle exec rake bsb:sync
       - id: get-date
         run: echo "::set-output name=date::$(date +'%Y-%m-%d')"
-      - uses: peter-evans/create-pull-request@v4
+      - uses: peter-evans/create-pull-request@v6
         id: raise-pr
         with:
           branch: "bot/${{ steps.get-date.outputs.date }}"
           base: master
           title: "fix: ${{ steps.get-date.outputs.date }} periodic update of config/*.json database files."
-          committer: GitHub Actions <actions@github.com>
-          author: ${{ github.actor }} <${{ github.actor }}@users.noreply.github.com>
-          signoff: false
           delete-branch: true
diff --git a/.ruby-version b/.ruby-version
index ef538c2..bea438e 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.1.2
+3.3.1
diff --git a/Gemfile b/Gemfile
index 44a74fb..99aebac 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,4 +8,4 @@ gemspec
 gem 'bundler', '~> 2.0'
 gem 'net-ftp', '~> 0.1.3'
 gem 'rake', '~> 13.0'
-gem 'rubocop', '~> 1.26'
+gem 'rubocop'
diff --git a/bsb.gemspec b/bsb.gemspec
index 76ca231..d810fb6 100644
--- a/bsb.gemspec
+++ b/bsb.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 2.7.0'
+  spec.required_ruby_version = '>= 2.7.7'
 
   spec.add_dependency 'activemodel'
 
diff --git a/lib/auspaynet/client.rb b/lib/auspaynet/client.rb
index d0be30e..c837a58 100644
--- a/lib/auspaynet/client.rb
+++ b/lib/auspaynet/client.rb
@@ -4,8 +4,6 @@
 
 module Auspaynet
   class Client
-    MONTHS = %w[Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec].freeze
-
     def initialize(host)
       @host = host
       @ftp = Net::FTP.new(@host)
@@ -23,35 +21,12 @@ def get(dir, filename)
     def list(dir:, matching_filename:, file_format: 'csv')
       @ftp.chdir(dir)
       files = @ftp.nlst.select do |f|
-        f.include?(matching_filename) &&
-          f.include?(file_format) &&
-          (f.include?("#{current_year}-") || f.include?("#{current_year})"))
+        f.include?(matching_filename) && f.end_with?(file_format)
       end
 
-      extract_latest_files(files: files, file_format: file_format)
+      files.sort_by { |fname| @ftp.mtime(fname) }
     ensure
       @ftp.chdir('/')
     end
-
-    private
-
-    def current_year
-      Time.now.strftime('%y')
-    end
-
-    def extract_latest_files(files:, file_format:)
-      files.sort_by do |filename|
-        file_for_month(filename: filename, file_format: file_format)
-      end
-    end
-
-    def file_for_month(filename:, file_format:)
-      month_from_filename = filename.gsub(/(#{filename}|#{file_format}|\W|\d)/, '')
-      month_number(month_from_filename)
-    end
-
-    def month_number(month_from_filename)
-      MONTHS.find_index(month_from_filename)
-    end
   end
 end