diff --git a/lib/polyamorous.rb b/lib/polyamorous.rb
deleted file mode 100644
index 83416101..00000000
--- a/lib/polyamorous.rb
+++ /dev/null
@@ -1 +0,0 @@
-require 'polyamorous/polyamorous'
diff --git a/lib/ransack/nodes/condition.rb b/lib/ransack/nodes/condition.rb
index d2217216..26314078 100644
--- a/lib/ransack/nodes/condition.rb
+++ b/lib/ransack/nodes/condition.rb
@@ -2,8 +2,8 @@ module Ransack
   module Nodes
     class Condition < Node
       i18n_word :attribute, :predicate, :combinator, :value
-      i18n_alias :a => :attribute, :p => :predicate,
-                 :m => :combinator, :v => :value
+      i18n_alias a: :attribute, p: :predicate,
+                 m: :combinator, v: :value
 
       attr_accessor :predicate
 
diff --git a/lib/ransack/nodes/grouping.rb b/lib/ransack/nodes/grouping.rb
index 38d794df..c2fb853a 100644
--- a/lib/ransack/nodes/grouping.rb
+++ b/lib/ransack/nodes/grouping.rb
@@ -7,7 +7,7 @@ class Grouping < Node
       alias :m= :combinator=
 
       i18n_word :condition, :and, :or
-      i18n_alias :c => :condition, :n => :and, :o => :or
+      i18n_alias c: :condition, n: :and, o: :or
 
       delegate :each, :to => :values
 
diff --git a/lib/ransack/nodes/node.rb b/lib/ransack/nodes/node.rb
index 3af1e8bc..e614e9ce 100644
--- a/lib/ransack/nodes/node.rb
+++ b/lib/ransack/nodes/node.rb
@@ -2,7 +2,7 @@ module Ransack
   module Nodes
     class Node
       attr_reader :context
-      delegate :contextualize, :to => :context
+      delegate :contextualize, to: :context
       class_attribute :i18n_words
       class_attribute :i18n_aliases
       self.i18n_words = []
diff --git a/lib/ransack/nodes/value.rb b/lib/ransack/nodes/value.rb
index 76b5c938..6b75925f 100644
--- a/lib/ransack/nodes/value.rb
+++ b/lib/ransack/nodes/value.rb
@@ -2,7 +2,7 @@ module Ransack
   module Nodes
     class Value < Node
       attr_accessor :value
-      delegate :present?, :blank?, :to => :value
+      delegate :present?, :blank?, to: :value
 
       def initialize(context, value = nil)
         super(context)
diff --git a/lib/ransack/ransacker.rb b/lib/ransack/ransacker.rb
index 3ae0c20d..a677880e 100644
--- a/lib/ransack/ransacker.rb
+++ b/lib/ransack/ransacker.rb
@@ -3,7 +3,7 @@ class Ransacker
 
     attr_reader :name, :type, :formatter, :args
 
-    delegate :call, :to => :@callable
+    delegate :call, to: :@callable
 
     def initialize(klass, name, opts = {}, &block)
       @klass, @name = klass, name
diff --git a/lib/ransack/search.rb b/lib/ransack/search.rb
index 95980c0c..fd9d04fc 100644
--- a/lib/ransack/search.rb
+++ b/lib/ransack/search.rb
@@ -9,10 +9,10 @@ class Search
 
     attr_reader :base, :context
 
-    delegate :object, :klass, :to => :context
+    delegate :object, :klass, to: :context
     delegate :new_grouping, :new_condition,
              :build_grouping, :build_condition,
-             :translate, :to => :base
+             :translate, to: :base
 
     def initialize(object, params = {}, options = {})
       strip_whitespace = options.fetch(:strip_whitespace, Ransack.options[:strip_whitespace])