diff --git a/.github/workflows/github-pages.yml b/.github/workflows/github-pages.yml
index a9def4743..0a983fd42 100644
--- a/.github/workflows/github-pages.yml
+++ b/.github/workflows/github-pages.yml
@@ -28,10 +28,10 @@ jobs:
           sudo apt update
           sudo apt install -y git openssh-client
 
-      - name: Setup Ruby 2.7
+      - name: Setup Ruby 3.0
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '2.7'
+          ruby-version: '3.0'
           bundler-cache: true
 
       - name: Checkout repository for Github Pages
diff --git a/.github/workflows/rspec.yml b/.github/workflows/rspec.yml
index 3103db5f8..0e5b0dbfb 100644
--- a/.github/workflows/rspec.yml
+++ b/.github/workflows/rspec.yml
@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        versions: [ '2.7', '3.0', '3.1', '3.2', '3.3' ]
+        versions: [ '3.0', '3.1', '3.2', '3.3' ]
 
     steps:
     - name: Checkout repository
diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index bf1634633..dd541120f 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -22,10 +22,10 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v3
 
-    - name: Setup Ruby 2.7
+    - name: Setup Ruby 3.0
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '2.7'
+        ruby-version: '3.0'
         bundler-cache: true
 
     - name: Run bundle install
diff --git a/.github/workflows/yard.yml b/.github/workflows/yard.yml
index 1b7cea63f..0f006d274 100644
--- a/.github/workflows/yard.yml
+++ b/.github/workflows/yard.yml
@@ -22,10 +22,10 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v3
 
-    - name: Setup Ruby 2.7
+    - name: Setup Ruby 3.0
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '2.7'
+        ruby-version: '3.0'
         bundler-cache: true
 
     - name: Run bundle install
diff --git a/.rubocop.yml b/.rubocop.yml
index cbe94c83a..06a88b61d 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -8,7 +8,7 @@ inherit_mode:
 
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 2.7
+  TargetRubyVersion: 3.0
 
 # Disable line length checks
 Layout/LineLength:
@@ -66,3 +66,11 @@ Style/SingleLineBlockParams:
   Methods:
     - reduce: [m, e]
     - inject: [m, e]
+
+# Rule to keep development dependencies inside gemspec file
+Gemspec/DevelopmentDependencies:
+  EnforcedStyle: gemspec
+
+# Rule disabled to avoid breaking methods or behaviors unnecessarily (Reactivate if you find it relevant)
+Style/ReturnNilInPredicateMethodDefinition:
+  Enabled: false
\ No newline at end of file
diff --git a/README.md b/README.md
index 5dc2196e5..e1f844e60 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ If you enjoy using the library, consider getting involved with the community to
 
 ## Dependencies
 
-* Ruby >= 2.7 supported
+* Ruby >= 3.0 supported
 * An installed build system for native extensions (on Windows, make sure you download the "Ruby+Devkit" version of [RubyInstaller](https://rubyinstaller.org/downloads/))
 
 ### Voice dependencies
diff --git a/discordrb-webhooks.gemspec b/discordrb-webhooks.gemspec
index 7705c97f8..1036ab065 100644
--- a/discordrb-webhooks.gemspec
+++ b/discordrb-webhooks.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency 'rest-client', '>= 2.0.0'
 
-  spec.required_ruby_version = '>= 2.7'
+  spec.required_ruby_version = '>= 3.0'
   spec.metadata = {
     'rubygems_mfa_required' => 'true'
   }
diff --git a/discordrb.gemspec b/discordrb.gemspec
index bba67e037..51e25e8aa 100644
--- a/discordrb.gemspec
+++ b/discordrb.gemspec
@@ -31,17 +31,17 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency 'discordrb-webhooks', '~> 3.5.0'
 
-  spec.required_ruby_version = '>= 2.7'
+  spec.required_ruby_version = '>= 3.0'
 
   spec.add_development_dependency 'bundler', '>= 1.10', '< 3'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'redcarpet', '~> 3.6.0' # YARD markdown formatting
   spec.add_development_dependency 'rspec', '~> 3.12.0'
-  spec.add_development_dependency 'rspec_junit_formatter', '~> 0.5.1'
+  spec.add_development_dependency 'rspec_junit_formatter', '~> 0.6.0'
   spec.add_development_dependency 'rspec-prof', '~> 0.0.7'
-  spec.add_development_dependency 'rubocop', '~> 1.36.0'
+  spec.add_development_dependency 'rubocop', '~> 1.59.0'
   spec.add_development_dependency 'rubocop-performance', '~> 1.0'
   spec.add_development_dependency 'rubocop-rake', '~> 0.6.0'
-  spec.add_development_dependency 'simplecov', '~> 0.21.0'
+  spec.add_development_dependency 'simplecov', '~> 0.22.0'
   spec.add_development_dependency 'yard', '~> 0.9.9'
 end
diff --git a/examples/channel_overwrite.rb b/examples/channel_overwrite.rb
index 4723f577e..a65d95ce9 100644
--- a/examples/channel_overwrite.rb
+++ b/examples/channel_overwrite.rb
@@ -49,7 +49,7 @@
     puts(event.bot.channel(CHANNEL_EDIT, event.server).permission_overwrites.map { |_, v| "#{v.type} - #{v.id} - #{v.allow.bits} / #{v.deny.bits}" })
 
     # Bulk edit from permission_overwrites return values (this method return a Hash and not an Array)
-    event.bot.channel(CHANNEL_EDIT, event.server).permission_overwrites = event.bot.channel(CHANNEL_EDIT, event.server).permission_overwrites
+    event.bot.channel(CHANNEL_EDIT, event.server).permission_overwrites = event.bot.channel(CHANNEL_EDIT, event.server).permission_overwrites # rubocop:disable Lint/SelfAssignment
     puts(event.bot.channel(CHANNEL_EDIT, event.server).permission_overwrites.map { |_, v| "#{v.type} - #{v.id} - #{v.allow.bits} / #{v.deny.bits}" })
 
     # Send nil to check if permission_overwrites not changed
diff --git a/lib/discordrb/bot.rb b/lib/discordrb/bot.rb
index 84bc987f3..1f1b83de2 100644
--- a/lib/discordrb/bot.rb
+++ b/lib/discordrb/bot.rb
@@ -339,7 +339,7 @@ def voice(thing)
       return nil unless channel
 
       server_id = channel.server.id
-      return @voices[server_id] if @voices[server_id]
+      @voices[server_id]
     end
 
     # Connects to a voice channel, initializes network connections and returns the {Voice::VoiceBot} over which audio
@@ -1396,7 +1396,7 @@ def handle_dispatch(type, data)
 
         new_activities = (data['activities'] || []).map { |act_data| Activity.new(act_data, self) }
         presence_user = @users[data['user']['id'].to_i]
-        old_activities = (presence_user&.activities || [])
+        old_activities = presence_user&.activities || []
         update_presence(data)
 
         # Starting a new game
@@ -1700,7 +1700,7 @@ def call_event(handler, event)
 
     def handle_awaits(event)
       @awaits ||= {}
-      @awaits.each do |_, await|
+      @awaits.each_value do |await|
         key, should_delete = await.match(event)
         next unless key
 
diff --git a/lib/discordrb/commands/parser.rb b/lib/discordrb/commands/parser.rb
index 2d9574690..d96f21778 100644
--- a/lib/discordrb/commands/parser.rb
+++ b/lib/discordrb/commands/parser.rb
@@ -159,7 +159,7 @@ def execute_bare(event)
       escaped = false
       hacky_delim, hacky_space, hacky_prev, hacky_newline = [0xe001, 0xe002, 0xe003, 0xe004].pack('U*').chars
 
-      @chain.each_char.each_with_index do |char, index|
+      @chain.each_char.with_index do |char, index|
         # Escape character
         if char == '\\' && !escaped
           escaped = true
diff --git a/lib/discordrb/data/component.rb b/lib/discordrb/data/component.rb
index 035e22680..409166651 100644
--- a/lib/discordrb/data/component.rb
+++ b/lib/discordrb/data/component.rb
@@ -100,7 +100,7 @@ def initialize(data, bot)
       # @method link?
       #   @return [true, false]
       Webhooks::View::BUTTON_STYLES.each do |name, value|
-        define_method("#{name}?") do
+        define_method(:"#{name}?") do
           @style == value
         end
       end
diff --git a/lib/discordrb/data/embed.rb b/lib/discordrb/data/embed.rb
index 546c57bd7..578285700 100644
--- a/lib/discordrb/data/embed.rb
+++ b/lib/discordrb/data/embed.rb
@@ -68,7 +68,7 @@ def initialize(data, message)
       @provider = data['provider'].nil? ? nil : EmbedProvider.new(data['provider'], self)
       @thumbnail = data['thumbnail'].nil? ? nil : EmbedThumbnail.new(data['thumbnail'], self)
       @author = data['author'].nil? ? nil : EmbedAuthor.new(data['author'], self)
-      @fields = data['fields'].nil? ? nil : data['fields'].map { |field| EmbedField.new(field, self) }
+      @fields = data['fields']&.map { |field| EmbedField.new(field, self) }
     end
   end
 
diff --git a/lib/discordrb/data/emoji.rb b/lib/discordrb/data/emoji.rb
index dc26aee58..5d81d7183 100644
--- a/lib/discordrb/data/emoji.rb
+++ b/lib/discordrb/data/emoji.rb
@@ -25,7 +25,7 @@ def initialize(data, bot, server = nil)
 
       @name = data['name']
       @server = server
-      @id = data['id'].nil? ? nil : data['id'].to_i
+      @id = data['id']&.to_i
       @animated = data['animated']
 
       process_roles(data['roles']) if server
diff --git a/lib/discordrb/data/interaction.rb b/lib/discordrb/data/interaction.rb
index 2e3b16561..02b0a4968 100644
--- a/lib/discordrb/data/interaction.rb
+++ b/lib/discordrb/data/interaction.rb
@@ -76,7 +76,7 @@ def initialize(data, bot)
               end
       @token = data['token']
       @version = data['version']
-      @components = @data['components']&.map { |component| Components.from_data(component, @bot) }&.compact || []
+      @components = @data['components']&.filter_map { |component| Components.from_data(component, @bot) } || []
     end
 
     # Respond to the creation of this interaction. An interaction must be responded to or deferred,
diff --git a/lib/discordrb/data/member.rb b/lib/discordrb/data/member.rb
index 0d5a3f8bb..f2cc80b2f 100644
--- a/lib/discordrb/data/member.rb
+++ b/lib/discordrb/data/member.rb
@@ -64,7 +64,7 @@ def initialize(data, server, bot)
       @bot = bot
 
       @user = bot.ensure_user(data['user'])
-      super @user # Initialize the delegate class
+      super(@user) # Initialize the delegate class
 
       @server = server
       @server_id = server&.id || data['guild_id'].to_i
diff --git a/lib/discordrb/data/message.rb b/lib/discordrb/data/message.rb
index 4066f512b..3e512aa6a 100644
--- a/lib/discordrb/data/message.rb
+++ b/lib/discordrb/data/message.rb
@@ -198,7 +198,7 @@ def respond(content, tts = false, embed = nil, attachments = nil, allowed_mentio
     # @return [Message] the resulting message.
     def edit(new_content, new_embeds = nil, new_components = nil)
       new_embeds = (new_embeds.instance_of?(Array) ? new_embeds.map(&:to_hash) : [new_embeds&.to_hash]).compact
-      new_components = new_components&.to_a || []
+      new_components = new_components.to_a
 
       response = API::Channel.edit_message(@bot.token, @channel.id, @id, new_content, [], new_embeds, new_components)
       Message.new(JSON.parse(response), @bot)
diff --git a/lib/discordrb/data/reaction.rb b/lib/discordrb/data/reaction.rb
index 202d5795b..491f5eb49 100644
--- a/lib/discordrb/data/reaction.rb
+++ b/lib/discordrb/data/reaction.rb
@@ -19,7 +19,7 @@ class Reaction
     def initialize(data)
       @count = data['count']
       @me = data['me']
-      @id = data['emoji']['id'].nil? ? nil : data['emoji']['id'].to_i
+      @id = data['emoji']['id']&.to_i
       @name = data['emoji']['name']
     end
 
diff --git a/lib/discordrb/data/recipient.rb b/lib/discordrb/data/recipient.rb
index 600c7356f..e0c046256 100644
--- a/lib/discordrb/data/recipient.rb
+++ b/lib/discordrb/data/recipient.rb
@@ -16,7 +16,7 @@ def initialize(user, channel, bot)
       raise ArgumentError, 'Tried to create a recipient for a public channel!' unless @channel.private?
 
       @user = user
-      super @user
+      super(@user)
 
       # Member attributes
       @mute = @deaf = @self_mute = @self_deaf = false
diff --git a/lib/discordrb/data/server.rb b/lib/discordrb/data/server.rb
index b868e9e84..71a538559 100644
--- a/lib/discordrb/data/server.rb
+++ b/lib/discordrb/data/server.rb
@@ -397,7 +397,7 @@ def add_role(role)
     # @!visibility private
     def delete_role(role_id)
       @roles.reject! { |r| r.id == role_id }
-      @members.each do |_, member|
+      @members.each_value do |member|
         new_roles = member.roles.reject { |r| r.id == role_id }
         member.update_roles(new_roles)
       end
@@ -515,7 +515,7 @@ def create_channel(name, type = 0, topic: nil, bitrate: nil, user_limit: nil, pe
     # @param reason [String] The reason the for the creation of this role.
     # @return [Role] the created role.
     def create_role(name: 'new role', colour: 0, hoist: false, mentionable: false, permissions: 104_324_161, reason: nil)
-      colour = colour.respond_to?(:combined) ? colour.combined : colour
+      colour = colour.combined if colour.respond_to?(:combined)
 
       permissions = if permissions.is_a?(Array)
                       Permissions.bits(permissions)
@@ -830,11 +830,11 @@ def update_data(new_data = nil)
       @afk_timeout = new_data[:afk_timeout] || new_data['afk_timeout'] || @afk_timeout
 
       afk_channel_id = new_data[:afk_channel_id] || new_data['afk_channel_id'] || @afk_channel
-      @afk_channel_id = afk_channel_id.nil? ? nil : afk_channel_id.resolve_id
+      @afk_channel_id = afk_channel_id&.resolve_id
       widget_channel_id = new_data[:widget_channel_id] || new_data['widget_channel_id'] || @widget_channel
-      @widget_channel_id = widget_channel_id.nil? ? nil : widget_channel_id.resolve_id
+      @widget_channel_id = widget_channel_id&.resolve_id
       system_channel_id = new_data[:system_channel_id] || new_data['system_channel_id'] || @system_channel
-      @system_channel_id = system_channel_id.nil? ? nil : system_channel_id.resolve_id
+      @system_channel_id = system_channel_id&.resolve_id
 
       @widget_enabled = new_data[:widget_enabled] || new_data['widget_enabled']
       @splash = new_data[:splash_id] || new_data['splash_id'] || @splash_id
diff --git a/lib/discordrb/data/user.rb b/lib/discordrb/data/user.rb
index b7be8500d..861794f96 100644
--- a/lib/discordrb/data/user.rb
+++ b/lib/discordrb/data/user.rb
@@ -90,7 +90,7 @@ def avatar_url(format = nil)
     attr_reader :public_flags
 
     FLAGS.each do |name, value|
-      define_method("#{name}?") do
+      define_method(:"#{name}?") do
         (@public_flags & value).positive?
       end
     end
@@ -233,7 +233,7 @@ def process_client_status(client_status)
     # @!method dnd?
     #   @return [true, false] whether this user is set to do not disturb.
     %i[offline idle online dnd].each do |e|
-      define_method("#{e}?") do
+      define_method(:"#{e}?") do
         @status.to_sym == e
       end
     end
diff --git a/lib/discordrb/permissions.rb b/lib/discordrb/permissions.rb
index b9194bde7..a9af116cb 100644
--- a/lib/discordrb/permissions.rb
+++ b/lib/discordrb/permissions.rb
@@ -52,7 +52,7 @@ class Permissions
     FLAGS.each do |position, flag|
       attr_reader flag
 
-      define_method "can_#{flag}=" do |value|
+      define_method :"can_#{flag}=" do |value|
         new_bits = @bits
         if value
           new_bits |= (1 << position)
@@ -81,7 +81,7 @@ def bits=(bits)
     def init_vars
       FLAGS.each do |position, flag|
         flag_set = ((@bits >> position) & 0x1) == 1
-        instance_variable_set "@#{flag}", flag_set
+        instance_variable_set :"@#{flag}", flag_set
       end
     end
 
@@ -194,7 +194,7 @@ def defined_permission?(action, channel = nil)
 
     # Define methods for querying permissions
     Discordrb::Permissions::FLAGS.each_value do |flag|
-      define_method "can_#{flag}?" do |channel = nil|
+      define_method :"can_#{flag}?" do |channel = nil|
         permission? flag, channel
       end
     end
@@ -220,7 +220,7 @@ def defined_role_permission?(action, channel)
           false
         else
           # Otherwise defer to the role
-          role.permissions.instance_variable_get("@#{action}") || can_act
+          role.permissions.instance_variable_get(:"@#{action}") || can_act
         end
       end
     end
@@ -232,9 +232,9 @@ def permission_overwrite(action, channel, id)
       # Otherwise, check the allow and deny objects
       allow = channel.permission_overwrites[id].allow
       deny = channel.permission_overwrites[id].deny
-      if allow.instance_variable_get("@#{action}")
+      if allow.instance_variable_get(:"@#{action}")
         :allow
-      elsif deny.instance_variable_get("@#{action}")
+      elsif deny.instance_variable_get(:"@#{action}")
         :deny
       end
 
diff --git a/lib/discordrb/voice/encoder.rb b/lib/discordrb/voice/encoder.rb
index 508848ae9..6e98ddb24 100644
--- a/lib/discordrb/voice/encoder.rb
+++ b/lib/discordrb/voice/encoder.rb
@@ -63,7 +63,7 @@ def adjust_volume(buf, mult)
         sample *= mult
 
         # clamp to s16 range
-        [32_767, [-32_768, sample].max].min
+        sample.clamp(-32_768, 32_767)
       end
 
       # After modification, make it s16le again
diff --git a/spec/data/channel_spec.rb b/spec/data/channel_spec.rb
index e068df8bf..656902bfb 100644
--- a/spec/data/channel_spec.rb
+++ b/spec/data/channel_spec.rb
@@ -19,7 +19,7 @@
   shared_examples 'a Channel property' do |property_name|
     it 'should call #update_channel_data with data' do
       expect(channel).to receive(:update_channel_data).with(property_name => property_value)
-      channel.__send__("#{property_name}=", property_value)
+      channel.__send__(:"#{property_name}=", property_value)
     end
   end
 
diff --git a/spec/overwrite_spec.rb b/spec/overwrite_spec.rb
index 4362afd7e..0ced52e45 100644
--- a/spec/overwrite_spec.rb
+++ b/spec/overwrite_spec.rb
@@ -40,7 +40,7 @@
       end
 
       it 'infers type from a User object' do
-        users.each do |_user_type, user|
+        users.each_value do |user|
           expect(described_class.new(user).type).to eq :member
         end
       end