diff --git a/.rubocop.yml b/.rubocop.yml
index 6a306a1..671f076 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,9 +2,15 @@ inherit_from:
   - .rubocop_todo.yml
   - ./.rubocop_todo.yml
 
+require: rubocop-performance
+
+Performance:
+  Enabled: true
+
 AllCops:
   Exclude:
     - 'performance/shopify/*'
+    - 'vendor/bundle/**/*'
     - 'pkg/**'
 
 Metrics/BlockNesting:
@@ -79,9 +85,6 @@ Style/TrailingCommaInArrayLiteral:
 Style/TrailingCommaInHashLiteral:
   Enabled: false
 
-Layout/IndentHash:
-  EnforcedStyle: consistent
-
 Style/FormatString:
   Enabled: false
 
@@ -106,9 +109,6 @@ Style/RegexpLiteral:
 Style/SymbolLiteral:
   Enabled: false
 
-Performance/Count:
-  Enabled: false
-
 Naming/ConstantName:
   Enabled: false
 
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 4af3202..19c27e8 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2019-04-22 19:11:24 -0400 using RuboCop version 0.53.0.
+# on 2019-08-27 22:42:50 +1000 using RuboCop version 0.74.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -8,16 +8,67 @@
 
 # Offense count: 1
 # Cop supports --auto-correct.
-# Configuration parameters: Include, TreatCommentsAsGroupSeparators.
+# Configuration parameters: TreatCommentsAsGroupSeparators, Include.
 # Include: **/*.gemspec
 Gemspec/OrderedDependencies:
   Exclude:
     - 'liquid.gemspec'
 
+# Offense count: 1
+# Configuration parameters: Include.
+# Include: **/*.gemspec, 
+Gemspec/RequiredRubyVersion:
+  Exclude:
+    - 'liquid.gemspec'
+
+# Offense count: 124
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: with_first_argument, with_fixed_indentation
+Layout/AlignArguments:
+  Enabled: false
+
+# Offense count: 7
+# Cop supports --auto-correct.
+# Configuration parameters: AllowMultipleStyles, EnforcedHashRocketStyle, EnforcedColonStyle, EnforcedLastArgumentHashStyle.
+# SupportedHashRocketStyles: key, separator, table
+# SupportedColonStyles: key, separator, table
+# SupportedLastArgumentHashStyles: always_inspect, always_ignore, ignore_implicit, ignore_explicit
+Layout/AlignHash:
+  Exclude:
+    - 'lib/liquid/condition.rb'
+    - 'lib/liquid/expression.rb'
+    - 'test/unit/context_unit_test.rb'
+
+# Offense count: 6
+# Cop supports --auto-correct.
+Layout/ClosingHeredocIndentation:
+  Exclude:
+    - 'test/integration/tags/for_tag_test.rb'
+
+# Offense count: 25
+# Cop supports --auto-correct.
+Layout/EmptyLineAfterGuardClause:
+  Exclude:
+    - 'lib/liquid/block.rb'
+    - 'lib/liquid/block_body.rb'
+    - 'lib/liquid/context.rb'
+    - 'lib/liquid/drop.rb'
+    - 'lib/liquid/lexer.rb'
+    - 'lib/liquid/parser.rb'
+    - 'lib/liquid/standardfilters.rb'
+    - 'lib/liquid/strainer.rb'
+    - 'lib/liquid/tags/for.rb'
+    - 'lib/liquid/tags/if.rb'
+    - 'lib/liquid/tags/include.rb'
+    - 'lib/liquid/utils.rb'
+    - 'lib/liquid/variable.rb'
+    - 'lib/liquid/variable_lookup.rb'
+
 # Offense count: 5
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle.
-# SupportedStyles: auto_detection, squiggly, active_support, powerpack, unindent
+# SupportedStyles: squiggly, active_support, powerpack, unindent
 Layout/IndentHeredoc:
   Exclude:
     - 'test/integration/tags/for_tag_test.rb'
@@ -32,6 +83,13 @@ Layout/MultilineMethodCallBraceLayout:
     - 'test/integration/error_handling_test.rb'
     - 'test/unit/strainer_unit_test.rb'
 
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: AllowForAlignment.
+Layout/SpaceAroundOperators:
+  Exclude:
+    - 'lib/liquid/condition.rb'
+
 # Offense count: 2
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle.
@@ -46,7 +104,7 @@ Lint/Void:
   Exclude:
     - 'lib/liquid/parse_context.rb'
 
-# Offense count: 53
+# Offense count: 52
 Metrics/AbcSize:
   Max: 56
 
@@ -54,27 +112,25 @@ Metrics/AbcSize:
 Metrics/CyclomaticComplexity:
   Max: 13
 
-# Offense count: 112
-# Configuration parameters: CountComments.
+# Offense count: 114
+# Configuration parameters: CountComments, ExcludedMethods.
 Metrics/MethodLength:
   Max: 38
 
-# Offense count: 8
+# Offense count: 9
 Metrics/PerceivedComplexity:
   Max: 11
 
-# Offense count: 52
-# Configuration parameters: Blacklist.
-# Blacklist: END, (?-mix:EO[A-Z]{1})
-Naming/HeredocDelimiterNaming:
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: PreferredName.
+Naming/RescuedExceptionsVariableName:
   Exclude:
-    - 'test/integration/assign_test.rb'
-    - 'test/integration/capture_test.rb'
-    - 'test/integration/trim_mode_test.rb'
+    - 'lib/liquid/context.rb'
 
-# Offense count: 23
+# Offense count: 20
 # Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
-# AllowedNames: io, id
+# AllowedNames: io, id, to, by, on, in, at, ip, db
 Naming/UncommunicativeMethodParamName:
   Exclude:
     - 'example/server/example_servlet.rb'
@@ -82,15 +138,22 @@ Naming/UncommunicativeMethodParamName:
     - 'lib/liquid/context.rb'
     - 'lib/liquid/standardfilters.rb'
     - 'lib/liquid/tags/if.rb'
-    - 'lib/liquid/utils.rb'
     - 'lib/liquid/variable.rb'
     - 'test/integration/filter_test.rb'
     - 'test/integration/standard_filter_test.rb'
-    - 'test/integration/tags/for_tag_test.rb'
     - 'test/integration/template_test.rb'
     - 'test/unit/condition_unit_test.rb'
 
-# Offense count: 12
+# Offense count: 3
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: inline, group
+Style/AccessModifierDeclarations:
+  Exclude:
+    - 'lib/liquid/tag.rb'
+    - 'lib/liquid/tags/include.rb'
+    - 'test/unit/strainer_unit_test.rb'
+
+# Offense count: 10
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle.
 # SupportedStyles: prefer_alias, prefer_alias_method
@@ -117,15 +180,9 @@ Style/ConditionalAssignment:
     - 'lib/liquid/errors.rb'
 
 # Offense count: 1
-Style/DateTime:
-  Exclude:
-    - 'test/unit/context_unit_test.rb'
-
-# Offense count: 2
 # Cop supports --auto-correct.
 Style/EmptyCaseCondition:
   Exclude:
-    - 'lib/liquid/block_body.rb'
     - 'lib/liquid/lexer.rb'
 
 # Offense count: 5
@@ -163,6 +220,13 @@ Style/FormatStringToken:
     - 'test/integration/filter_test.rb'
     - 'test/integration/hash_ordering_test.rb'
 
+# Offense count: 103
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, never
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
 # Offense count: 14
 # Configuration parameters: MinBodyLength.
 Style/GuardClause:
@@ -180,6 +244,13 @@ Style/GuardClause:
     - 'lib/liquid/variable.rb'
     - 'test/unit/tokenizer_unit_test.rb'
 
+# Offense count: 52
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: literals, strict
+Style/MutableConstant:
+  Enabled: false
+
 # Offense count: 1
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, MinBodyLength.
@@ -188,9 +259,9 @@ Style/Next:
   Exclude:
     - 'lib/liquid/tags/for.rb'
 
-# Offense count: 4
+# Offense count: 13
 # Cop supports --auto-correct.
-# Configuration parameters: AutoCorrect, EnforcedStyle.
+# Configuration parameters: AutoCorrect, EnforcedStyle, IgnoredMethods.
 # SupportedStyles: predicate, comparison
 Style/NumericPredicate:
   Exclude:
@@ -199,6 +270,8 @@ Style/NumericPredicate:
     - 'lib/liquid/forloop_drop.rb'
     - 'lib/liquid/standardfilters.rb'
     - 'lib/liquid/tablerowloop_drop.rb'
+    - 'test/integration/standard_filter_test.rb'
+    - 'test/integration/template_test.rb'
 
 # Offense count: 14
 # Cop supports --auto-correct.
@@ -216,6 +289,16 @@ Style/RedundantSelf:
   Exclude:
     - 'lib/liquid/strainer.rb'
 
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: ConvertCodeThatCanStartToReturnNil, Whitelist.
+# Whitelist: present?, blank?, presence, try, try!
+Style/SafeNavigation:
+  Exclude:
+    - 'lib/liquid/drop.rb'
+    - 'lib/liquid/strainer.rb'
+    - 'lib/liquid/tokenizer.rb'
+
 # Offense count: 9
 # Cop supports --auto-correct.
 # Configuration parameters: AllowAsExpressionSeparator.
@@ -253,8 +336,9 @@ Style/WhileUntilModifier:
   Exclude:
     - 'lib/liquid/tags/case.rb'
 
-# Offense count: 648
-# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
+# Offense count: 650
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect, AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
 # URISchemes: http, https
 Metrics/LineLength:
   Max: 294
diff --git a/.travis.yml b/.travis.yml
index 3a01754..082cb57 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,29 +1,21 @@
 language: ruby
 
 rvm:
-  - 2.1
-  - 2.2
-  - 2.3
   - 2.4
   - 2.5
+  - 2.6
+  - 2.7
   - ruby-head
   - jruby-head
-#  - rbx-2
-
-sudo: false
-
-addons:
-  apt:
-    packages:
-    - libgmp3-dev
+  - truffleruby
 
 matrix:
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head
+    - rvm: truffleruby
 
-install:
-  - bundle install
+cache: bundler
 
 script: bundle exec rake
 
diff --git a/Gemfile b/Gemfile
index 37ffe1d..370fa03 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,15 +9,16 @@ group :benchmark, :test do
   gem 'benchmark-ips'
   gem 'memory_profiler'
 
-  install_if -> { RUBY_PLATFORM !~ /mingw|mswin|java/ } do
+  install_if -> { RUBY_PLATFORM !~ /mingw|mswin|java/ && RUBY_ENGINE != 'truffleruby' } do
     gem 'stackprof'
   end
 end
 
 group :test do
-  gem 'rubocop', '~> 0.53.0'
+  gem 'rubocop', '~> 0.74.0', require: false
+  gem 'rubocop-performance', require: false
 
-  platform :mri do
-    gem 'liquid-c', github: 'Shopify/liquid-c', ref: '9168659de45d6d576fce30c735f857e597fa26f6'
+  platform :mri, :truffleruby do
+    gem 'liquid-c', github: 'Shopify/liquid-c', ref: '7ba926791ef8411984d0f3e41c6353fd716041c6'
   end
 end
diff --git a/Rakefile b/Rakefile
index 9650abb..f7186eb 100755
--- a/Rakefile
+++ b/Rakefile
@@ -19,8 +19,10 @@ task :warn_test do
 end
 
 task :rubocop do
-  require 'rubocop/rake_task'
-  RuboCop::RakeTask.new
+  if RUBY_ENGINE == 'ruby'
+    require 'rubocop/rake_task'
+    RuboCop::RakeTask.new
+  end
 end
 
 desc 'runs test suite with both strict and lax parsers'
@@ -32,8 +34,8 @@ task :test do
   Rake::Task['base_test'].reenable
   Rake::Task['base_test'].invoke
 
-  if RUBY_ENGINE == 'ruby'
-    ENV['LIQUID-C'] = '1'
+  if RUBY_ENGINE == 'ruby' || RUBY_ENGINE == 'truffleruby'
+    ENV['LIQUID_C'] = '1'
 
     ENV['LIQUID_PARSER_MODE'] = 'lax'
     Rake::Task['base_test'].reenable
diff --git a/liquid.gemspec b/liquid.gemspec
index e0e4ddb..89df19a 100644
--- a/liquid.gemspec
+++ b/liquid.gemspec
@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
   s.license     = "MIT"
   # s.description = "A secure, non-evaling end user template engine with aesthetic markup."
 
-  s.required_ruby_version     = ">= 2.1.0"
+  s.required_ruby_version     = ">= 2.4.0"
   s.required_rubygems_version = ">= 1.3.7"
 
   s.test_files  = Dir.glob("{test}/**/*")
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 34e7553..affa2e4 100755
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -14,7 +14,7 @@ if env_mode = ENV['LIQUID_PARSER_MODE']
 end
 Liquid::Template.error_mode = mode
 
-if ENV['LIQUID-C'] == '1'
+if ENV['LIQUID_C'] == '1'
   puts "-- LIQUID C"
   require 'liquid/c'
 end