diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 33f9af6..4d0f301 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -30,23 +30,6 @@ jobs:
       with:
         token: ${{ secrets.QLTY_COVERAGE_TOKEN }}
         files: coverage/.resultset.json
-  # CodeClimate has become qlth.sh, this integration is currently broken.
-  # coverage:
-  #   needs: test
-  #   runs-on: ubuntu-latest
-  #   env:
-  #     BUNDLE_WITHOUT: optional
-  #   steps:
-  #   - uses: actions/checkout@v6.0.1
-  #   - uses: ruby/setup-ruby@v1
-  #     with:
-  #       bundler-cache: true
-  #   - name: Publish code coverage
-  #     uses: paambaati/codeclimate-action@v9
-  #     env:
-  #       CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
-  #     with:
-  #       coverageCommand: bundle exec rake
 
   yard:
     runs-on: ubuntu-latest
diff --git a/.gitignore b/.gitignore
index 8b80bb7..26c65b8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,5 +7,6 @@
 /spec/reports/
 /tmp/
 /bin/
+/vendor/bundle/
 # rspec failure tracking
 .rspec_status
diff --git a/.qlty/qlty.toml b/.qlty/qlty.toml
index 2f50e17..e130b32 100644
--- a/.qlty/qlty.toml
+++ b/.qlty/qlty.toml
@@ -77,3 +77,13 @@ threshold = 5
 [[source]]
 name = "default"
 default = true
+
+[[plugin]]
+name = "rubocop"
+package_file = "Gemfile.qlty"
+package_filters = ["rubocop"]
+config_files = [".rubocop.yml", ".rubocop_todo.yml"]
+
+[[plugin]]
+name = "reek"
+mode = "comment"
diff --git a/Gemfile b/Gemfile
index 04e63f5..d09c9b0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,9 +10,6 @@ group :optional do
   gem "guard-rspec"
   gem "pry"
   gem "redcarpet", platform: :mri # redcarpet doesn't support jruby
-  gem "rubocop"
-  gem "rubocop-rake"
-  gem "rubocop-rspec"
   gem "ruby-maven", platform: :jruby
   gem "ruby-prof", platform: :mri
   gem "simplecov-html"
@@ -20,6 +17,7 @@ group :optional do
   gem "terminal-notifier"
   gem "terminal-notifier-guard"
   gem "webrick"
+  eval_gemfile("Gemfile.qlty")
 end
 
 gem "bigdecimal"
diff --git a/Gemfile.lock b/Gemfile.lock
index a8656b5..3220a71 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    ruby-units (4.1.0)
+    ruby-units (5.0.0)
 
 GEM
   remote: https://rubygems.org/
@@ -20,12 +20,10 @@ GEM
       reline (>= 0.3.8)
     diff-lcs (1.6.2)
     docile (1.4.1)
-    e2mmap (0.1.0)
     erb (6.0.1)
     erb (6.0.1-java)
     ffi (1.17.2-arm64-darwin)
     ffi (1.17.2-java)
-    ffi (1.17.2-x86_64-darwin)
     ffi (1.17.2-x86_64-linux-gnu)
     formatador (1.2.3)
       reline
@@ -74,13 +72,12 @@ GEM
       racc (~> 1.4)
     nokogiri (1.18.10-java)
       racc (~> 1.4)
-    nokogiri (1.18.10-x86_64-darwin)
-      racc (~> 1.4)
     nokogiri (1.18.10-x86_64-linux-gnu)
       racc (~> 1.4)
     notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)
+    observer (0.1.2)
     ostruct (0.6.3)
     parallel (1.27.0)
     parser (3.3.10.0)
@@ -110,7 +107,9 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.11.1)
       ffi (~> 1.0)
-    rdoc (7.0.1)
+    rbs (3.10.0)
+      logger
+    rdoc (7.0.2)
       erb
       psych (>= 4.0.0)
       tsort
@@ -118,7 +117,7 @@ GEM
     regexp_parser (2.11.3)
     reline (0.6.3)
       io-console (~> 0.5)
-    reverse_markdown (2.1.1)
+    reverse_markdown (3.0.1)
       nokogiri
     rexml (3.4.4)
     rspec (3.13.2)
@@ -134,7 +133,7 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
     rspec-support (3.13.6)
-    rubocop (1.82.0)
+    rubocop (1.82.1)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
@@ -167,21 +166,27 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.13.2)
     simplecov_json_formatter (0.1.4)
-    solargraph (0.48.0)
+    solargraph (0.57.0)
       backport (~> 1.2)
-      benchmark
-      bundler (>= 1.17.2)
+      benchmark (~> 0.4)
+      bundler (~> 2.0)
       diff-lcs (~> 1.4)
-      e2mmap
-      jaro_winkler (~> 1.5)
+      jaro_winkler (~> 1.6, >= 1.6.1)
       kramdown (~> 2.3)
       kramdown-parser-gfm (~> 1.1)
+      logger (~> 1.6)
+      observer (~> 0.1)
+      ostruct (~> 0.6)
       parser (~> 3.0)
-      reverse_markdown (>= 1.0.5, < 3)
-      rubocop (>= 0.52)
+      prism (~> 1.4)
+      rbs (>= 3.6.1, <= 4.0.0.dev.4)
+      reverse_markdown (~> 3.0)
+      rubocop (~> 1.76)
       thor (~> 1.0)
       tilt (~> 2.0)
       yard (~> 0.9, >= 0.9.24)
+      yard-activesupport-concern (~> 0.0)
+      yard-solargraph (~> 0.1)
     spoon (0.0.6)
       ffi
     stringio (3.2.0)
@@ -195,17 +200,16 @@ GEM
     unicode-emoji (4.2.0)
     webrick (1.9.2)
     yard (0.9.38)
+    yard-activesupport-concern (0.0.1)
+      yard (>= 0.8)
+    yard-solargraph (0.1.0)
+      yard (~> 0.9)
 
 PLATFORMS
-  arm64-darwin-21
-  arm64-darwin-22
-  arm64-darwin-23
-  arm64-darwin-24
   arm64-darwin-25
   java
   universal-java-11
   universal-java-18
-  x86_64-darwin-19
   x86_64-linux
 
 DEPENDENCIES
@@ -232,4 +236,4 @@ DEPENDENCIES
   yard
 
 BUNDLED WITH
-  4.0.2
+   2.7.2
diff --git a/Gemfile.qlty b/Gemfile.qlty
new file mode 100644
index 0000000..35bc830
--- /dev/null
+++ b/Gemfile.qlty
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+# These are gems used by qlty to perform code quality checks.
+# They are installed by the qlty cli tool and are included for local development, but are not installed in CI.
+
+gem "rubocop"
+gem "rubocop-rake"
+gem "rubocop-rspec"
diff --git a/README.md b/README.md
index 00d9ad7..64b74e7 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,8 @@ manipulations to ensure an accurate result.
 
 ## Installation
 
+This package requires Ruby 3.2 or later.
+
 This package may be installed using:
 
 ```bash
@@ -52,6 +54,7 @@ unit = "1 mm".to_unit                # convert string object
 unit = object.to_unit                # convert any object using object.to_s
 unit = Unit.new('1/4 cup')           # Rational number
 unit = Unit.new('1+1i mm')           # Complex Number
+unit = Unit.new(scalar: 1.5, numerator: ["<meter>"], denominator: ["<second>"])  # keyword arguments
 ```
 
 ### Rules
diff --git a/lib/ruby_units/configuration.rb b/lib/ruby_units/configuration.rb
index 0f52b77..3d4206f 100644
--- a/lib/ruby_units/configuration.rb
+++ b/lib/ruby_units/configuration.rb
@@ -42,9 +42,15 @@ class Configuration
     #   @return [Symbol] the format to use when generating output (:rational or :exponential) (default: :rational)
     attr_reader :format
 
-    def initialize
-      self.format = :rational
-      self.separator = true
+    # Initialize configuration with keyword arguments
+    #
+    # @param separator [Boolean] whether to include a space between the scalar and the unit (default: true)
+    # @param format [Symbol] the format to use when generating output (default: :rational)
+    # @param _options [Hash] additional keyword arguments (ignored, for forward compatibility)
+    # @return [Configuration] a new configuration instance
+    def initialize(separator: true, format: :rational, **_options)
+      self.separator = separator
+      self.format = format
     end
 
     # Use a space for the separator to use when generating output.
diff --git a/lib/ruby_units/definition.rb b/lib/ruby_units/definition.rb
index 793b4c5..8d9ad01 100644
--- a/lib/ruby_units/definition.rb
+++ b/lib/ruby_units/definition.rb
@@ -79,15 +79,11 @@ def definition=(unit)
 
     # is this definition for a prefix?
     # @return [Boolean]
-    def prefix?
-      kind == :prefix
-    end
+    def prefix? = kind == :prefix
 
     # Is this definition the unity definition?
     # @return [Boolean]
-    def unity?
-      prefix? && scalar == 1
-    end
+    def unity? = prefix? && scalar == 1
 
     # is this a base unit?
     # units are base units if the scalar is one, and the unit is defined in terms of itself.
diff --git a/lib/ruby_units/unit.rb b/lib/ruby_units/unit.rb
index 9a7d30e..b0e12db 100644
--- a/lib/ruby_units/unit.rb
+++ b/lib/ruby_units/unit.rb
@@ -325,7 +325,10 @@ def self.eliminate_terms(q, n, d)
       end
       num = UNITY_ARRAY if num.empty?
       den = UNITY_ARRAY if den.empty?
-      { scalar: q, numerator: num.flatten, denominator: den.flatten }
+      scalar = q
+      numerator = num.flatten
+      denominator = den.flatten
+      { scalar:, numerator:, denominator: }
     end
 
     # Creates a new unit from the current one with all common terms eliminated.
@@ -519,32 +522,32 @@ def initialize(*options)
       end
 
       case options[0]
-      when Unit
-        copy(options[0])
+      in Unit => unit
+        copy(unit)
         return
-      when Hash
-        @scalar      = options[0][:scalar] || 1
-        @numerator   = options[0][:numerator] || UNITY_ARRAY
-        @denominator = options[0][:denominator] || UNITY_ARRAY
-        @signature   = options[0][:signature]
-      when Array
-        initialize(*options[0])
+      in Hash => hash
+        @scalar      = hash[:scalar] || 1
+        @numerator   = hash[:numerator] || UNITY_ARRAY
+        @denominator = hash[:denominator] || UNITY_ARRAY
+        @signature   = hash[:signature]
+      in Array => array
+        initialize(*array)
         return
-      when Numeric
-        @scalar    = options[0]
+      in Numeric => num
+        @scalar    = num
         @numerator = @denominator = UNITY_ARRAY
-      when Time
-        @scalar      = options[0].to_f
+      in Time => time
+        @scalar      = time.to_f
         @numerator   = ["<second>"]
         @denominator = UNITY_ARRAY
-      when DateTime, Date
-        @scalar      = options[0].ajd
+      in DateTime | Date => date
+        @scalar      = date.ajd
         @numerator   = ["<day>"]
         @denominator = UNITY_ARRAY
-      when /^\s*$/
+      in /^\s*$/ => _empty
         raise ArgumentError, "No Unit Specified"
-      when String
-        parse(options[0])
+      in String => str
+        parse(str)
       else
         raise ArgumentError, "Invalid Unit Format"
       end
@@ -1334,22 +1337,25 @@ def -@
     def abs
       return @scalar.abs if unitless?
 
-      self.class.new(@scalar.abs, @numerator, @denominator)
+      self.class.new(scalar: @scalar.abs, numerator: @numerator, denominator: @denominator)
     end
 
     # ceil of a unit
+    # Forwards all arguments to the scalar's ceil method
     # @return [Numeric,Unit]
-    def ceil(*args)
-      return @scalar.ceil(*args) if unitless?
+    def ceil(...)
+      return @scalar.ceil(...) if unitless?
 
-      self.class.new(@scalar.ceil(*args), @numerator, @denominator)
+      self.class.new(scalar: @scalar.ceil(...), numerator: @numerator, denominator: @denominator)
     end
 
+    # Floor of a unit
+    # Forwards all arguments to the scalar's floor method
     # @return [Numeric,Unit]
-    def floor(*args)
-      return @scalar.floor(*args) if unitless?
+    def floor(...)
+      return @scalar.floor(...) if unitless?
 
-      self.class.new(@scalar.floor(*args), @numerator, @denominator)
+      self.class.new(scalar: @scalar.floor(...), numerator: @numerator, denominator: @denominator)
     end
 
     # Round the unit according to the rules of the scalar's class. Call this
@@ -1357,22 +1363,25 @@ def floor(*args)
     # Rational, etc..). Because unit conversions can often result in Rational
     # scalars (to preserve precision), it may be advisable to use +to_s+ to
     # format output instead of using +round+.
+    # Forwards all arguments to the scalar's round method
     # @example
     #   RubyUnits::Unit.new('21870 mm/min').convert_to('m/min').round(1) #=> 2187/100 m/min
     #   RubyUnits::Unit.new('21870 mm/min').convert_to('m/min').to_s('%0.1f') #=> 21.9 m/min
     #
     # @return [Numeric,Unit]
-    def round(*args, **kwargs)
-      return @scalar.round(*args, **kwargs) if unitless?
+    def round(...)
+      return @scalar.round(...) if unitless?
 
-      self.class.new(@scalar.round(*args, **kwargs), @numerator, @denominator)
+      self.class.new(scalar: @scalar.round(...), numerator: @numerator, denominator: @denominator)
     end
 
+    # Truncate the unit according to the scalar's truncate method
+    # Forwards all arguments to the scalar's truncate method
     # @return [Numeric, Unit]
-    def truncate(*args)
-      return @scalar.truncate(*args) if unitless?
+    def truncate(...)
+      return @scalar.truncate(...) if unitless?
 
-      self.class.new(@scalar.truncate(*args), @numerator, @denominator)
+      self.class.new(scalar: @scalar.truncate(...), numerator: @numerator, denominator: @denominator)
     end
 
     # Returns next unit in a range. Increments the scalar by 1.
@@ -1385,7 +1394,7 @@ def truncate(*args)
     def succ
       raise ArgumentError, "Non Integer Scalar" unless @scalar == @scalar.to_i
 
-      self.class.new(@scalar.to_i.succ, @numerator, @denominator)
+      self.class.new(scalar: @scalar.to_i.succ, numerator: @numerator, denominator: @denominator)
     end
 
     alias next succ
@@ -1400,7 +1409,7 @@ def succ
     def pred
       raise ArgumentError, "Non Integer Scalar" unless @scalar == @scalar.to_i
 
-      self.class.new(@scalar.to_i.pred, @numerator, @denominator)
+      self.class.new(scalar: @scalar.to_i.pred, numerator: @numerator, denominator: @denominator)
     end
 
     # Tries to make a Time object from current unit.  Assumes the current unit hold the duration in seconds from the epoch.
diff --git a/lib/ruby_units/version.rb b/lib/ruby_units/version.rb
index fd6350a..7e26759 100644
--- a/lib/ruby_units/version.rb
+++ b/lib/ruby_units/version.rb
@@ -2,6 +2,6 @@
 
 module RubyUnits
   class Unit < Numeric
-    VERSION = "4.1.0"
+    VERSION = "5.0.0"
   end
 end
diff --git a/ruby-units.gemspec b/ruby-units.gemspec
index 3983ad8..c3d561c 100644
--- a/ruby-units.gemspec
+++ b/ruby-units.gemspec
@@ -11,7 +11,7 @@ Gem::Specification.new do |spec|
   spec.email         = ["kevin.olbrich@gmail.com"]
 
   spec.required_rubygems_version = ">= 2.0"
-  spec.required_ruby_version = ">= 2.7"
+  spec.required_ruby_version = ">= 3.2"
   spec.summary       = "Provides classes and methods to perform unit math and conversions"
   spec.description   = "Provides classes and methods to perform unit math and conversions"
   spec.homepage      = "https://github.com/olbrich/ruby-units"
diff --git a/spec/ruby_units/configuration_spec.rb b/spec/ruby_units/configuration_spec.rb
index 0b35c76..a90970f 100644
--- a/spec/ruby_units/configuration_spec.rb
+++ b/spec/ruby_units/configuration_spec.rb
@@ -3,6 +3,32 @@
 require "spec_helper"
 
 describe RubyUnits::Configuration do
+  describe "#initialize" do
+    it "accepts keyword arguments for separator and format" do
+      config = described_class.new(separator: false, format: :exponential)
+      expect(config.separator).to be_nil
+      expect(config.format).to eq :exponential
+    end
+
+    it "uses default values when no arguments are provided" do
+      config = described_class.new
+      expect(config.separator).to eq " "
+      expect(config.format).to eq :rational
+    end
+
+    it "accepts additional keyword arguments for forward compatibility" do
+      expect { described_class.new(separator: true, unknown_option: "value") }.not_to raise_error
+    end
+
+    it "validates separator value" do
+      expect { described_class.new(separator: "invalid") }.to raise_error(ArgumentError)
+    end
+
+    it "validates format value" do
+      expect { described_class.new(format: :invalid) }.to raise_error(ArgumentError)
+    end
+  end
+
   describe ".separator" do
     context "when set to true" do
       it "has a space between the scalar and the unit" do
diff --git a/spec/ruby_units/unit_spec.rb b/spec/ruby_units/unit_spec.rb
index d919231..5970f3d 100644
--- a/spec/ruby_units/unit_spec.rb
+++ b/spec/ruby_units/unit_spec.rb
@@ -273,6 +273,43 @@
     end
   end
 
+  # keyword arguments
+  describe RubyUnits::Unit.new(scalar: 1.5, numerator: ["<meter>"], denominator: ["<second>"]) do
+    it { is_expected.to be_a Numeric }
+    it { is_expected.to be_an_instance_of Unit }
+
+    describe "#scalar" do
+      subject { super().scalar }
+
+      it { is_expected.to eq(1.5) }
+      it { is_expected.to be_a Float }
+    end
+
+    describe "#units" do
+      subject { super().units }
+
+      it { is_expected.to eq("m/s") }
+    end
+
+    describe "#kind" do
+      subject { super().kind }
+
+      it { is_expected.to eq(:speed) }
+    end
+
+    it { is_expected.not_to be_temperature }
+    it { is_expected.not_to be_degree }
+    it { is_expected.to be_base }
+    it { is_expected.not_to be_unitless }
+    it { is_expected.not_to be_zero }
+
+    describe "#base" do
+      subject { super().base }
+
+      it { is_expected.to eq(subject) }
+    end
+  end
+
   # scalar and unit
   describe RubyUnits::Unit.new("1 mm") do
     it { is_expected.to be_a Numeric }