diff --git a/.rubocop.yml b/.rubocop.yml
index 09ebaf7e..a2accd46 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -151,8 +151,6 @@ Style/StringLiterals:
   Enabled: false
 Style/StringLiteralsInInterpolation:
   Enabled: false
-Style/SymbolArray:
-  Enabled: false
 Style/TernaryParentheses:
   Enabled: false
 Style/TrailingCommaInArguments:
diff --git a/bin/ridgepole b/bin/ridgepole
index 4049c364..c6839048 100755
--- a/bin/ridgepole
+++ b/bin/ridgepole
@@ -148,7 +148,7 @@ ARGV.options do |opt|
 
     opt.parse!
 
-    if not mode or ([:apply, :export].include?(mode) and not config) or (options[:with_apply] and not config)
+    if not mode or (%i(apply export).include?(mode) and not config) or (options[:with_apply] and not config)
       puts opt.help
       exit 1
     end
diff --git a/lib/ridgepole/diff.rb b/lib/ridgepole/diff.rb
index 4c1be066..672cd79d 100644
--- a/lib/ridgepole/diff.rb
+++ b/lib/ridgepole/diff.rb
@@ -169,7 +169,7 @@ def convert_to_primary_key_attrs(column_options)
       type = Ridgepole::DSLParser::TableDefinition::DEFAULT_PRIMARY_KEY_TYPE
     end
 
-    if [:integer, :bigint].include?(type) && !options.key?(:default)
+    if %i(integer bigint).include?(type) && !options.key?(:default)
       options[:auto_increment] = true
     end