diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 535eece..e482104 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,8 +21,9 @@ jobs:
       - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: 3
           bundler-cache: true
+
       - name: Run rubocop
         run: bundle exec rubocop --format progress
   build:
@@ -30,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: ['2.7', '3.0', '3.1', '3.2', '3.3']
+        ruby: ['3.0', '3.1', '3.2', '3.3']
 
     steps:
       - uses: actions/checkout@v4
@@ -38,5 +39,6 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
+
       - name: Run tests
         run: bundle exec rake
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index e700502..8b76609 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -10,12 +10,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@master
-
-      - name: Set up Ruby 2.7
-        uses: actions/setup-ruby@v1
+      - uses: actions/checkout@v4
+      - uses: actions/setup-ruby@v1
         with:
-          ruby-version: 2.7.x
+          ruby-version: 3
 
       - name: Publish to RubyGems
         run: |
diff --git a/.rubocop.yml b/.rubocop.yml
index de1e010..50ac415 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -7,7 +7,7 @@ AllCops:
   DisplayCopNames: true
   DisplayStyleGuide: true
   NewCops: enable
-  TargetRubyVersion: 2.7
+  TargetRubyVersion: 3.0
 
 Metrics/BlockLength:
   Exclude:
diff --git a/lib/sidekiq/logging/argument_filter.rb b/lib/sidekiq/logging/argument_filter.rb
index ba60693..d86e48b 100644
--- a/lib/sidekiq/logging/argument_filter.rb
+++ b/lib/sidekiq/logging/argument_filter.rb
@@ -27,7 +27,7 @@ def compiled_filter
 
       class CompiledFilter # :nodoc:
         def self.compile(filters)
-          return ->(args) { args.dup } if filters.empty?
+          return lambda(&:dup) if filters.empty?
 
           strings = []
           regexps = []
diff --git a/lib/sidekiq/logstash.rb b/lib/sidekiq/logstash.rb
index ce72193..ba12475 100644
--- a/lib/sidekiq/logstash.rb
+++ b/lib/sidekiq/logstash.rb
@@ -4,7 +4,6 @@
 require 'sidekiq/logstash/version'
 require 'sidekiq/logging/logstash_formatter'
 require 'sidekiq/logging/argument_filter'
-require 'sidekiq/logstash_job_logger'
 
 module Sidekiq
   # Main level module for Sidekiq::Logstash.
@@ -22,6 +21,8 @@ def self.configure
     def self.setup(_opts = {})
       # Calls Sidekiq.configure_server to inject logics
       Sidekiq.configure_server do |config|
+        require 'sidekiq/logstash_job_logger'
+
         # Remove default, noisy error handler,
         # unless LogStash.configuration.keep_default_error_handler is set to true
         unless configuration.keep_default_error_handler
diff --git a/sidekiq-logstash.gemspec b/sidekiq-logstash.gemspec
index aca7d1f..791c177 100644
--- a/sidekiq-logstash.gemspec
+++ b/sidekiq-logstash.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
 
   spec.files = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.require_paths = ['lib']
-  spec.required_ruby_version = '>= 2.7.0'
+  spec.required_ruby_version = '>= 3.0.0'
 
   spec.add_dependency 'logstash-event', '~> 1.2'
   spec.add_dependency 'sidekiq', '~> 7.0'
diff --git a/spec/sidekiq/logstash_spec.rb b/spec/sidekiq/logstash_spec.rb
index e0d6702..6310298 100644
--- a/spec/sidekiq/logstash_spec.rb
+++ b/spec/sidekiq/logstash_spec.rb
@@ -15,7 +15,7 @@ def process(worker, params = [], encrypt: false)
   let(:job) { build(:job) }
   let(:logstash_config) { Sidekiq::Logstash::Configuration.new }
   let(:sidekiq_config) { Sidekiq::Config.new }
-  let(:processor) { ::Sidekiq::Processor.new(sidekiq_config.default_capsule) }
+  let(:processor) { Sidekiq::Processor.new(sidekiq_config.default_capsule) }
   let(:log_message) { JSON.parse(buffer.string) }
   let(:log_messages) { buffer.string.split("\n").map { |log| JSON.parse(log) } }
   let(:mock_redis) { double(:Redis) }