diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index b74ee513..59c01fe2 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -19,21 +19,21 @@ jobs:
   changelog:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - id: read-version
         run: |
           echo "::set-output name=VERSION::`cat lib/ice_cube/version.rb | grep -i version | awk '{ print $3 }' | sed -e 's/\"//g'`"
-      - uses: dangoslen/changelog-enforcer@v2.3.1
+      - uses: dangoslen/changelog-enforcer@v3
         with:
           skipLabels: 'skip-changelog'
           expectedLatestVersion: ${{ steps.read-version.outputs.VERSION }}
   lint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '2.6'
+        ruby-version: '3.1'
         bundler-cache: true
     - run: bundle exec standardrb
   test:
@@ -42,22 +42,13 @@ jobs:
       - lint
     strategy:
       matrix:
-        rails: ['5.2', '6.0.4', '6.1', '7.0']
-        ruby: ['2.6', '2.7', '3.0', '3.1']
-        exclude:
-          - rails: '5.2'
-            ruby: '3.0'
-          - rails: '5.2'
-            ruby: '3.1'
-          - rails: '7.0'
-            ruby: '2.6'
-          - rails: '7.0'
-            ruby: '2.7'
+        rails: ['6.1', '7.0', '7.1']
+        ruby: ['3.1', '3.2', '3.3']
     runs-on: ubuntu-latest
     env:
       RAILS_VERSION: ${{ matrix.rails }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c0022b92..02129328 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 - Removed use of `delegate` method added in [66f1d797](https://github.com/ice-cube-ruby/ice_cube/commit/66f1d797092734563bfabd2132c024c7d087f683) , reverting to previous implementation. ([#522](https://github.com/ice-cube-ruby/ice_cube/pull/522))  by [@pacso](https://github.com/pacso)
+- Updated supported versions of Ruby and Rails and fixed standardrb lint issues. ([#552](https://github.com/ice-cube-ruby/ice_cube/pull/552)) by [@pacso](https://github.com/pacso)
 
 ### Fixed
 - Fix for weekly interval results when requesting `occurrences_between` on a narrow range ([#487](https://github.com/seejohnrun/ice_cube/pull/487)) by [@jakebrady5](https://github.com/jakebrady5)
diff --git a/ice_cube.gemspec b/ice_cube.gemspec
index 5191c6fa..b1924c18 100644
--- a/ice_cube.gemspec
+++ b/ice_cube.gemspec
@@ -17,7 +17,6 @@ Gem::Specification.new do |s|
   s.version = IceCube::VERSION
   s.platform = Gem::Platform::RUBY
   s.files = Dir["lib/**/*.rb", "config/**/*.yml"]
-  s.test_files = Dir.glob("spec/*.rb")
   s.require_paths = ["lib"]
 
   s.add_development_dependency("rake")
diff --git a/lib/ice_cube/builders/string_builder.rb b/lib/ice_cube/builders/string_builder.rb
index c87e97ed..07703631 100644
--- a/lib/ice_cube/builders/string_builder.rb
+++ b/lib/ice_cube/builders/string_builder.rb
@@ -61,7 +61,7 @@ def ordinal(number)
         ord = IceCube::I18n.t("ice_cube.integer.ordinals")[number] ||
           IceCube::I18n.t("ice_cube.integer.ordinals")[number % 10] ||
           IceCube::I18n.t("ice_cube.integer.ordinals")[:default]
-        number >= 0 ? ord : IceCube::I18n.t("ice_cube.integer.negative", ordinal: ord)
+        (number >= 0) ? ord : IceCube::I18n.t("ice_cube.integer.negative", ordinal: ord)
       end
     end
 
diff --git a/lib/ice_cube/flexible_hash.rb b/lib/ice_cube/flexible_hash.rb
index f23bb8ce..64edbfc0 100644
--- a/lib/ice_cube/flexible_hash.rb
+++ b/lib/ice_cube/flexible_hash.rb
@@ -25,9 +25,9 @@ def delete(key)
 
     def _match_key(key)
       return key if __getobj__.has_key? key
-      if Symbol == key.class
+      if key.instance_of?(Symbol)
         __getobj__.keys.detect { |k| return k if k == key.to_s }
-      elsif String == key.class
+      elsif key.instance_of?(String)
         __getobj__.keys.detect { |k| return k if k.to_s == key }
       end
       key
diff --git a/lib/ice_cube/input_alignment.rb b/lib/ice_cube/input_alignment.rb
index 8900fa15..2cb14c1b 100644
--- a/lib/ice_cube/input_alignment.rb
+++ b/lib/ice_cube/input_alignment.rb
@@ -8,16 +8,16 @@ def initialize(rule, value, rule_part)
 
     attr_reader :rule, :value, :rule_part
 
-    def verify(freq, options = {}, &block)
+    def verify(freq, options = {}, &)
       @rule.validations[:interval] or return
 
       case @rule
       when DailyRule
-        verify_wday_alignment(freq, &block)
+        verify_wday_alignment(freq, &)
       when MonthlyRule
-        verify_month_alignment(freq, &block)
+        verify_month_alignment(freq, &)
       else
-        verify_freq_alignment(freq, &block)
+        verify_freq_alignment(freq, &)
       end
     end
 
@@ -28,12 +28,12 @@ def interval_validation
     end
 
     def interval_value
-      @interval_value ||= rule_part == :interval ? value : interval_validation.interval
+      @interval_value ||= (rule_part == :interval) ? value : interval_validation.interval
     end
 
     def fixed_validations
       @fixed_validations ||= @rule.validations.values.flatten.select { |v|
-        interval_type = (v.type == :wday ? :day : v.type)
+        interval_type = ((v.type == :wday) ? :day : v.type)
         v.class < Validations::FixedValue &&
           interval_type == rule.base_interval_validation.type
       }
diff --git a/lib/ice_cube/null_i18n.rb b/lib/ice_cube/null_i18n.rb
index 028ab2c5..0ec25e23 100644
--- a/lib/ice_cube/null_i18n.rb
+++ b/lib/ice_cube/null_i18n.rb
@@ -5,7 +5,7 @@ module NullI18n
     def self.t(key, options = {})
       base = key.to_s.split(".").reduce(config) { |hash, current_key| hash[current_key] }
 
-      base = base[options[:count] == 1 ? "one" : "other"] if options[:count]
+      base = base[(options[:count] == 1) ? "one" : "other"] if options[:count]
 
       case base
       when Hash
diff --git a/lib/ice_cube/occurrence.rb b/lib/ice_cube/occurrence.rb
index 4c51f962..3892f6c6 100644
--- a/lib/ice_cube/occurrence.rb
+++ b/lib/ice_cube/occurrence.rb
@@ -90,7 +90,7 @@ def to_s(format = nil)
       else
         t0, t1 = start_time.to_s, end_time.to_s
       end
-      duration > 0 ? "#{t0} - #{t1}" : t0
+      (duration > 0) ? "#{t0} - #{t1}" : t0
     end
 
     def overnight?
diff --git a/lib/ice_cube/rules/weekly_rule.rb b/lib/ice_cube/rules/weekly_rule.rb
index e24f77f9..fd2ffd72 100644
--- a/lib/ice_cube/rules/weekly_rule.rb
+++ b/lib/ice_cube/rules/weekly_rule.rb
@@ -35,7 +35,7 @@ def realign(step_time, start_time)
       time = TimeUtil::TimeWrapper.new(start_time)
       offset = wday_offset(step_time, start_time)
       time.add(:day, offset)
-      super step_time, time.to_time
+      super(step_time, time.to_time)
     end
 
     # Calculate how many days to the first wday validation in the correct
diff --git a/lib/ice_cube/schedule.rb b/lib/ice_cube/schedule.rb
index 68f01cc9..06b8e4dd 100644
--- a/lib/ice_cube/schedule.rb
+++ b/lib/ice_cube/schedule.rb
@@ -160,8 +160,8 @@ def all_occurrences_enumerator
     end
 
     # Iterate forever
-    def each_occurrence(&block)
-      enumerate_occurrences(start_time, &block).to_a
+    def each_occurrence(&)
+      enumerate_occurrences(start_time, &).to_a
       self
     end
 
@@ -191,7 +191,7 @@ def previous_occurrences(num, from)
       from = TimeUtil.match_zone(from, start_time) or raise ArgumentError, "Time required, got #{from.inspect}"
       return [] if from <= start_time
       a = enumerate_occurrences(start_time, from - 1).to_a
-      a.size > num ? a[-1 * num, a.size] : a
+      (a.size > num) ? a[-1 * num, a.size] : a
     end
 
     # The remaining occurrences (same requirements as all_occurrences)
diff --git a/lib/ice_cube/time_util.rb b/lib/ice_cube/time_util.rb
index 001d927d..a18f7758 100644
--- a/lib/ice_cube/time_util.rb
+++ b/lib/ice_cube/time_util.rb
@@ -51,7 +51,7 @@ def self.match_zone(input_time, reference)
       else
         time.getlocal(reference.utc_offset)
       end
-      Date === input_time ? beginning_of_date(time, reference) : time
+      (Date === input_time) ? beginning_of_date(time, reference) : time
     end
 
     # Ensure that this is either nil, or a time
@@ -286,12 +286,12 @@ def to_time
       def add(type, val)
         type = :day if type == :wday
         @time += case type
-                 when :year then TimeUtil.days_in_n_years(@time, val) * ONE_DAY
-                 when :month then TimeUtil.days_in_n_months(@time, val) * ONE_DAY
-                 when :day then val * ONE_DAY
-                 when :hour then val * ONE_HOUR
-                 when :min then val * ONE_MINUTE
-                 when :sec then val
+        when :year then TimeUtil.days_in_n_years(@time, val) * ONE_DAY
+        when :month then TimeUtil.days_in_n_months(@time, val) * ONE_DAY
+        when :day then val * ONE_DAY
+        when :hour then val * ONE_HOUR
+        when :min then val * ONE_MINUTE
+        when :sec then val
         end
       end
 
@@ -318,20 +318,20 @@ def sec=(value)
       end
 
       def clear_sec
-        @time.sec > 0 ? @time -= @time.sec : @time
+        (@time.sec > 0) ? @time -= @time.sec : @time
       end
 
       def clear_min
-        @time.min > 0 ? @time -= (@time.min * ONE_MINUTE) : @time
+        (@time.min > 0) ? @time -= (@time.min * ONE_MINUTE) : @time
       end
 
       def clear_hour
-        @time.hour > 0 ? @time -= (@time.hour * ONE_HOUR) : @time
+        (@time.hour > 0) ? @time -= (@time.hour * ONE_HOUR) : @time
       end
 
       # Move to the first of the month, 0 hours
       def clear_day
-        @time.day > 1 ? @time -= (@time.day - 1) * ONE_DAY : @time
+        (@time.day > 1) ? @time -= (@time.day - 1) * ONE_DAY : @time
       end
 
       # Clear to january 1st
diff --git a/lib/ice_cube/validations/day_of_week.rb b/lib/ice_cube/validations/day_of_week.rb
index e00193b7..c04695bc 100644
--- a/lib/ice_cube/validations/day_of_week.rb
+++ b/lib/ice_cube/validations/day_of_week.rb
@@ -29,12 +29,12 @@ def dst_adjust?
 
       def validate(step_time, start_time)
         wday = step_time.wday
-        offset = day < wday ? (7 - wday + day) : (day - wday)
+        offset = (day < wday) ? (7 - wday + day) : (day - wday)
         wrapper = TimeUtil::TimeWrapper.new(step_time)
         wrapper.add :day, offset
         loop do
           which_occ, num_occ = TimeUtil.which_occurrence_in_month(wrapper.to_time, day)
-          this_occ = occ < 0 ? (num_occ + occ + 1) : occ
+          this_occ = (occ < 0) ? (num_occ + occ + 1) : occ
           break offset if which_occ == this_occ
           wrapper.add :day, 7
           offset += 7
diff --git a/lib/ice_cube/validations/day_of_year.rb b/lib/ice_cube/validations/day_of_year.rb
index 239f241e..c9efecdb 100644
--- a/lib/ice_cube/validations/day_of_year.rb
+++ b/lib/ice_cube/validations/day_of_year.rb
@@ -28,9 +28,9 @@ def dst_adjust?
 
       def validate(step_time, start_time)
         days_in_year = TimeUtil.days_in_year(step_time)
-        yday = day < 0 ? day + days_in_year + 1 : day
+        yday = (day < 0) ? day + days_in_year + 1 : day
         offset = yday - step_time.yday
-        offset >= 0 ? offset : offset + days_in_year
+        (offset >= 0) ? offset : offset + days_in_year
       end
 
       def build_s(builder)
diff --git a/lib/ice_cube/validations/fixed_value.rb b/lib/ice_cube/validations/fixed_value.rb
index 2cfdd5fb..c06a7a95 100644
--- a/lib/ice_cube/validations/fixed_value.rb
+++ b/lib/ice_cube/validations/fixed_value.rb
@@ -26,7 +26,7 @@ def validate(time, start_time)
     def validate_interval_lock(time, start_time)
       t0 = starting_unit(start_time)
       t1 = time.send(type)
-      t0 >= t1 ? t0 - t1 : INTERVALS[type] - t1 + t0
+      (t0 >= t1) ? t0 - t1 : INTERVALS[type] - t1 + t0
     end
 
     # Lock the hour if explicitly set by hour_of_day, but allow for the nearest
@@ -73,16 +73,16 @@ def validate_day_lock(time, start_time)
       if value && value > 0
         until_next_month = days_in_month + sleeps
       else
-        until_next_month = start < 28 ? days_in_month : TimeUtil.days_to_next_month(date)
+        until_next_month = (start < 28) ? days_in_month : TimeUtil.days_to_next_month(date)
         until_next_month += sleeps - month_overflow
       end
 
-      sleeps >= 0 ? sleeps : until_next_month
+      (sleeps >= 0) ? sleeps : until_next_month
     end
 
     def starting_unit(start_time)
       start = value || start_time.send(type)
-      start = start % INTERVALS[type] if start < 0
+      start %= INTERVALS[type] if start < 0
       start
     end
   end
diff --git a/lib/ice_cube/validations/hour_of_day.rb b/lib/ice_cube/validations/hour_of_day.rb
index e0a9c3be..f32f9f6f 100644
--- a/lib/ice_cube/validations/hour_of_day.rb
+++ b/lib/ice_cube/validations/hour_of_day.rb
@@ -28,7 +28,7 @@ def realign(opening_time, start_time)
         time.hour = first_hour.value
       end
 
-      super opening_time, time.to_time
+      super(opening_time, time.to_time)
     end
 
     class Validation < Validations::FixedValue
diff --git a/lib/ice_cube/validations/lock.rb b/lib/ice_cube/validations/lock.rb
index 954463c1..33249382 100644
--- a/lib/ice_cube/validations/lock.rb
+++ b/lib/ice_cube/validations/lock.rb
@@ -26,7 +26,7 @@ def validate(time, start_time)
     def validate_interval_lock(time, start_time)
       t0 = starting_unit(start_time)
       t1 = time.send(type)
-      t0 >= t1 ? t0 - t1 : INTERVALS[type] - t1 + t0
+      (t0 >= t1) ? t0 - t1 : INTERVALS[type] - t1 + t0
     end
 
     # Lock the hour if explicitly set by hour_of_day, but allow for the nearest
@@ -73,11 +73,11 @@ def validate_day_lock(time, start_time)
       if value && value > 0
         until_next_month = days_in_month + sleeps
       else
-        until_next_month = start < 28 ? days_in_month : TimeUtil.days_to_next_month(date)
+        until_next_month = (start < 28) ? days_in_month : TimeUtil.days_to_next_month(date)
         until_next_month += sleeps - month_overflow
       end
 
-      sleeps >= 0 ? sleeps : until_next_month
+      (sleeps >= 0) ? sleeps : until_next_month
     end
 
     def starting_unit(start_time)
diff --git a/lib/ice_cube/validations/minute_of_hour.rb b/lib/ice_cube/validations/minute_of_hour.rb
index f3f82448..4daebec5 100644
--- a/lib/ice_cube/validations/minute_of_hour.rb
+++ b/lib/ice_cube/validations/minute_of_hour.rb
@@ -20,7 +20,7 @@ def realign(opening_time, start_time)
       first_minute = validations[:minute_of_hour].min_by(&:value)
       time = TimeUtil::TimeWrapper.new(start_time, false)
       time.min = first_minute.value
-      super opening_time, time.to_time
+      super(opening_time, time.to_time)
     end
 
     class Validation < Validations::FixedValue
diff --git a/lib/ice_cube/validations/second_of_minute.rb b/lib/ice_cube/validations/second_of_minute.rb
index dea0b35b..dd79f2c7 100644
--- a/lib/ice_cube/validations/second_of_minute.rb
+++ b/lib/ice_cube/validations/second_of_minute.rb
@@ -20,7 +20,7 @@ def realign(opening_time, start_time)
       first_second = Array(validations[:second_of_minute]).min_by(&:value)
       time = TimeUtil::TimeWrapper.new(start_time, false)
       time.sec = first_second.value
-      super opening_time, time.to_time
+      super(opening_time, time.to_time)
     end
 
     class Validation < Validations::FixedValue
diff --git a/spec/examples/ice_cube_spec.rb b/spec/examples/ice_cube_spec.rb
index 354d2e48..d925f63d 100644
--- a/spec/examples/ice_cube_spec.rb
+++ b/spec/examples/ice_cube_spec.rb
@@ -668,7 +668,7 @@
   def quick_attempt_test
     time = Time.now
     10.times do
-      (yield).next_occurrence(Time.now)
+      yield.next_occurrence(Time.now)
     end
     total = Time.now - time
     expect(total).to be < 0.1
diff --git a/spec/examples/occurrence_spec.rb b/spec/examples/occurrence_spec.rb
index 80c18421..943c5ebb 100644
--- a/spec/examples/occurrence_spec.rb
+++ b/spec/examples/occurrence_spec.rb
@@ -28,7 +28,12 @@
       time_now = Time.current
       occurrence = Occurrence.new(time_now)
 
-      expect(occurrence.to_s(:short)).to eq time_now.to_s(:short)
+      # From Rails 7.1 onwards, support for format options was removed
+      if time_now.public_method(:to_s).arity != 0
+        expect(occurrence.to_s(:short)).to eq time_now.to_s(:short)
+      else
+        expect(occurrence.to_s(:short)).to eq time_now.to_s
+      end
     end
   end