diff --git a/.rubocop.yml b/.rubocop.yml
index def815012c..29c74a704e 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -5,12 +5,14 @@ inherit_mode:
 
 require:
   - standard
+  - rubocop-packaging
+  - rubocop-rake
+
+plugins:
   - standard-custom
   - standard-performance
   - rubocop-performance
   - rubocop-minitest
-  - rubocop-packaging
-  - rubocop-rake
 
 inherit_gem:
   standard: config/base.yml
diff --git a/Gemfile b/Gemfile
index 0d97621670..9d8698be00 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,7 +24,7 @@ group :development do
   gem "simplecov", "= 0.21.2"
 
   # rubocop
-  gem "standard", "1.45.0"
+  gem "standard", "1.47.0"
   gem "rubocop-minitest", "0.37.0"
   gem "rubocop-packaging", "0.5.2"
   gem "rubocop-rake", "0.6.0"
diff --git a/ext/nokogiri/extconf.rb b/ext/nokogiri/extconf.rb
index 5efeb33dc2..2960367e6b 100644
--- a/ext/nokogiri/extconf.rb
+++ b/ext/nokogiri/extconf.rb
@@ -461,7 +461,7 @@ def recipe.port_path
     yield recipe
 
     env = Hash.new do |hash, key|
-      hash[key] = (ENV[key]).to_s
+      hash[key] = ENV[key].to_s
     end
 
     recipe.configure_options.flatten!
diff --git a/lib/nokogiri/xml/document.rb b/lib/nokogiri/xml/document.rb
index 6c9d4949a1..445b815672 100644
--- a/lib/nokogiri/xml/document.rb
+++ b/lib/nokogiri/xml/document.rb
@@ -502,10 +502,10 @@ def deconstruct_keys(keys)
         { root: root }
       end
 
-      private
-
       IMPLIED_XPATH_CONTEXTS = ["//"].freeze # :nodoc:
 
+      private
+
       def inspect_attributes
         [:name, :children]
       end
diff --git a/lib/nokogiri/xml/node.rb b/lib/nokogiri/xml/node.rb
index 270fea2272..82f784a9af 100644
--- a/lib/nokogiri/xml/node.rb
+++ b/lib/nokogiri/xml/node.rb
@@ -1605,6 +1605,8 @@ def coerce(data)
         EOERR
       end
 
+      IMPLIED_XPATH_CONTEXTS = [".//"].freeze # :nodoc:
+
       private
 
       def keywordify(keywords)
@@ -1655,8 +1657,6 @@ def inspect_attributes
         [:name, :namespace, :attribute_nodes, :children]
       end
 
-      IMPLIED_XPATH_CONTEXTS = [".//"].freeze
-
       def add_child_node_and_reparent_attrs(node)
         add_child_node(node)
         node.attribute_nodes.find_all { |a| a.name.include?(":") }.each do |attr_node|