diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b93467dc6..d950a6e5b 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -141,7 +141,6 @@ jobs:
         cfg:
           - {os: ubuntu-latest, ruby: '2.7'}
           - {os: ubuntu-22.04, ruby: '3.2'} # with openssl 3
-          - {os: ubuntu-22.04, ruby: 'jruby-9.3.14.0'}
           - {os: ubuntu-latest, ruby: 'jruby-9.4.8.0'}
           - {os: ubuntu-latest, ruby: 'jruby-9.4.12.1'}
           - {os: windows-2022, ruby: '2.7'}
diff --git a/.rubocop.yml b/.rubocop.yml
index 8736c5679..7e0d2e15d 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -2,7 +2,7 @@
 inherit_from: .rubocop_todo.yml
 
 AllCops:
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 2.7
   Exclude:
     - acceptance/**/*
     - vendor/**/*
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 5604e22e6..86a9fb54e 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -6,16 +6,6 @@
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# Offense count: 2
-# Configuration parameters: EnforcedStyle, AllowedPatterns, ForbiddenIdentifiers, ForbiddenPatterns.
-# SupportedStyles: snake_case, camelCase
-# ForbiddenIdentifiers: __id__, __send__
-Naming/MethodName:
-  Exclude:
-    - 'spec/mocks/win32ole.rb'
-    - 'spec/mocks/ffi.rb'
-    - 'spec/facter/util/windows/network_utils_spec.rb'
-
 # Offense count: 3
 # This cop supports safe autocorrection (--autocorrect).
 Performance/RegexpMatch:
@@ -35,7 +25,7 @@ Style/ClassVars:
     - 'spec/custom_facts/puppetlabs_spec/files.rb'
     - 'spec/framework/logging/logger_spec.rb'
 
-# Offense count: 981
+# Offense count: 982
 # Configuration parameters: AllowedConstants.
 Style/Documentation:
   Enabled: false
@@ -46,3 +36,16 @@ Style/Documentation:
 Style/OptionalBooleanParameter:
   Exclude:
     - 'lib/facter/util/resolvers/http.rb'
+
+# Offense count: 13
+# This cop supports unsafe autocorrection (--autocorrect-all).
+Style/SlicingWithRange:
+  Exclude:
+    - 'install.rb'
+    - 'lib/facter/facts/solaris/ldom.rb'
+    - 'lib/facter/framework/cli/cli.rb'
+    - 'lib/facter/resolvers/aix/serialnumber.rb'
+    - 'lib/facter/resolvers/freebsd/swap_memory.rb'
+    - 'lib/facter/resolvers/networking.rb'
+    - 'lib/facter/resolvers/partitions.rb'
+    - 'lib/facter/util/api_debugger.rb'
diff --git a/lib/docs/generate.rb b/lib/docs/generate.rb
index 9ed92a011..4ea43d8e7 100755
--- a/lib/docs/generate.rb
+++ b/lib/docs/generate.rb
@@ -18,11 +18,7 @@ def format_facts(fact_hash)
                            facts: fact_hash
                          })
 
-  erb = if ERB.instance_method(:initialize).parameters.assoc(:key) # Ruby 2.6+
-          ERB.new(File.read(PATH_TO_TEMPLATE), trim_mode: '-')
-        else
-          ERB.new(File.read(PATH_TO_TEMPLATE), nil, '-')
-        end
+  erb = ERB.new(File.read(PATH_TO_TEMPLATE), trim_mode: '-')
   erb.result(scope.instance_eval { binding })
 end
 
diff --git a/lib/facter/framework/cli/cli.rb b/lib/facter/framework/cli/cli.rb
index 55d9c13c1..7f430f91f 100755
--- a/lib/facter/framework/cli/cli.rb
+++ b/lib/facter/framework/cli/cli.rb
@@ -113,7 +113,7 @@ def man(*args)
       negate_options = %w[block cache custom_facts external_facts]
 
       template = File.join(File.dirname(__FILE__), '..', '..', 'templates', 'man.erb')
-      erb = ERB.new(File.read(template), nil, '-')
+      erb = ERB.new(File.read(template), trim_mode: '-')
       erb.filename = template
       puts erb.result(binding)
     end
diff --git a/openfact.gemspec b/openfact.gemspec
index 17d4e7ab2..bbb589dd8 100644
--- a/openfact.gemspec
+++ b/openfact.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |spec|
   base = "#{__dir__}#{File::SEPARATOR}"
   spec.files = dirs.map { |path| path.sub(base, '') }
 
-  spec.required_ruby_version = '>= 2.5', '< 5.0'
+  spec.required_ruby_version = '>= 2.7', '< 5.0'
   spec.bindir = 'bin'
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']