diff --git a/.rubocop.yml b/.rubocop.yml
index 3ee5cbe..568b758 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -7,12 +7,6 @@ AllCops:
     - "vendor/**/*"
 Metrics/AbcSize:
   Max: 40
-Metrics/LineLength:
-  Max: 125
-  AllowURI: true
-  URISchemes:
-    - http
-    - https
 Metrics/MethodLength:
   Max: 20
 Metrics/CyclomaticComplexity:
@@ -21,18 +15,36 @@ Metrics/PerceivedComplexity:
   Max: 10
 Metrics/BlockLength:
   Enabled: false
-Documentation:
+Style/Documentation:
   Enabled: false
 Style/SignalException:
   EnforcedStyle: only_raise
-Layout/IndentHash:
+Layout/LineLength:
+  Max: 125
+  AllowURI: true
+  URISchemes:
+    - http
+    - https
+Layout/FirstHashElementIndentation:
   EnforcedStyle: consistent
-Layout/IndentArray:
+Layout/FirstArrayElementIndentation:
   EnforcedStyle: consistent
 Layout/EndAlignment:
   EnforcedStyleAlignWith: variable
 Lint/InheritException:
   Enabled: false
+Lint/SendWithMixinArgument:
+  Enabled: false
+Lint/RaiseException:
+  Enabled: false
+Lint/StructNewOverride:
+  Enabled: false
+Style/HashEachMethods:
+  Enabled: false
+Style/HashTransformKeys:
+  Enabled: false
+Style/HashTransformValues:
+  Enabled: false
 Style/FrozenStringLiteralComment:
   Enabled: false
 RSpec/AnyInstance:
diff --git a/.travis.yml b/.travis.yml
index 0a55624..fd666b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,8 @@ rvm:
   - 2.5
   - 2.6
   - 2.7
+  - 3.0
+  - 3.1
 env:
   jobs:
   -
@@ -13,6 +15,8 @@ env:
   - ACTIVE_RECORD_VERSION=4.2.0 SQLITE3_VERSION=1.3.13
   - ACTIVE_RECORD_VERSION=5.0.0 SQLITE3_VERSION=1.3.13
   - ACTIVE_RECORD_VERSION=6.0.0
+  - ACTIVE_RECORD_VERSION=6.1.0
+  - ACTIVE_RECORD_VERSION=7.0.0
 matrix:
   allow_failures:
     - rvm: 2.4
@@ -33,8 +37,36 @@ matrix:
       env: ACTIVE_RECORD_VERSION=4.1.0 SQLITE3_VERSION=1.3.13
     - rvm: 2.7
       env: ACTIVE_RECORD_VERSION=4.2.0 SQLITE3_VERSION=1.3.13
+    - rvm: 3.0
+      env: ACTIVE_RECORD_VERSION=4.0.0 SQLITE3_VERSION=1.3.13
+    - rvm: 3.0
+      env: ACTIVE_RECORD_VERSION=4.1.0 SQLITE3_VERSION=1.3.13
+    - rvm: 3.0
+      env: ACTIVE_RECORD_VERSION=4.2.0 SQLITE3_VERSION=1.3.13
+    - rvm: 3.0
+      env: ACTIVE_RECORD_VERSION=5.0.0 SQLITE3_VERSION=1.3.13
+    - rvm: 3.1
+      env: ACTIVE_RECORD_VERSION=4.0.0 SQLITE3_VERSION=1.3.13
+    - rvm: 3.1
+      env: ACTIVE_RECORD_VERSION=4.1.0 SQLITE3_VERSION=1.3.13
+    - rvm: 3.1
+      env: ACTIVE_RECORD_VERSION=4.2.0 SQLITE3_VERSION=1.3.13
+    - rvm: 3.1
+      env: ACTIVE_RECORD_VERSION=5.0.0 SQLITE3_VERSION=1.3.13
     - rvm: 2.4
       env: ACTIVE_RECORD_VERSION=6.0.0
+    - rvm: 3.0
+      env: ACTIVE_RECORD_VERSION=6.0.0
+    - rvm: 3.1
+      env: ACTIVE_RECORD_VERSION=6.0.0
+    - rvm: 2.4
+      env: ACTIVE_RECORD_VERSION=6.1.0
+    - rvm: 2.4
+      env: ACTIVE_RECORD_VERSION=7.0.0
+    - rvm: 2.5
+      env: ACTIVE_RECORD_VERSION=7.0.0
+    - rvm: 2.6
+      env: ACTIVE_RECORD_VERSION=7.0.0
 before_install:
   - gem update --system
   - gem --version
diff --git a/acts_as_hashids.gemspec b/acts_as_hashids.gemspec
index f6134f3..ecee755 100644
--- a/acts_as_hashids.gemspec
+++ b/acts_as_hashids.gemspec
@@ -19,16 +19,16 @@ Gem::Specification.new do |spec|
   spec.executables   = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = ['>= 2.2.2', '< 3.0']
+  spec.required_ruby_version = ['>= 2.3.0', '< 3.2']
 
-  spec.add_runtime_dependency 'activerecord', '>= 4.0', '< 6.1'
+  spec.add_runtime_dependency 'activerecord', '>= 4.0', '< 7.1'
   spec.add_runtime_dependency 'hashids', '~> 1.0'
 
   spec.add_development_dependency 'codeclimate-test-reporter', '~> 0.5'
   spec.add_development_dependency 'coveralls', '~> 0.8'
   spec.add_development_dependency 'rake', '~> 10.0'
   spec.add_development_dependency 'rspec', '~> 3.0'
-  spec.add_development_dependency 'rubocop', '~> 0.54.0'
+  spec.add_development_dependency 'rubocop', '~> 0.81.0'
   spec.add_development_dependency 'rubocop-rspec', '~> 1.24.0'
   spec.add_development_dependency 'simplecov', '~> 0.11'
   spec.add_development_dependency 'sqlite3', '~> 1.3'
diff --git a/lib/acts_as_hashids/core.rb b/lib/acts_as_hashids/core.rb
index 6048a4b..19c3aae 100644
--- a/lib/acts_as_hashids/core.rb
+++ b/lib/acts_as_hashids/core.rb
@@ -59,10 +59,10 @@ def with_hashids(*ids)
         where(primary_key => decoded_ids)
       end
 
-      def has_many(*args, &block) # rubocop:disable Style/PredicateName
+      def has_many(*args, &block) # rubocop:disable Naming/PredicateName
         options = args.extract_options!
         options[:extend] = (options[:extend] || []).concat([FinderMethods])
-        super(*args, options, &block)
+        super(*args, **options, &block)
       end
 
       def relation