diff --git a/kaminari-actionview/lib/kaminari/actionview/action_view_extension.rb b/kaminari-actionview/lib/kaminari/actionview/action_view_extension.rb
index 1f03fd5..7c30cc1 100644
--- a/kaminari-actionview/lib/kaminari/actionview/action_view_extension.rb
+++ b/kaminari-actionview/lib/kaminari/actionview/action_view_extension.rb
@@ -22,8 +22,9 @@ module Kaminari
     # * <tt>:ANY_OTHER_VALUES</tt> - Any other hash key & values would be directly passed into each tag as :locals value.
     def paginate(scope, paginator_class: Kaminari::Helpers::Paginator, **options)
       options[:total_pages] ||= scope.total_pages
+      options.reverse_merge! current_page: scope.current_page, per_page: scope.limit_value, remote: false
 
-      paginator = paginator_class.new(self, options.reverse_merge(current_page: scope.current_page, per_page: scope.limit_value, remote: false))
+      paginator = paginator_class.new self, options
       paginator.to_s
     end
 
@@ -44,10 +45,13 @@ module Kaminari
     #   <%= link_to_previous_page @users, 'Previous Page' do %>
     #     <span>At the Beginning</span>
     #   <% end %>
-    def link_to_previous_page(scope, name, options = {})
+    def link_to_previous_page(scope, name, **options)
       prev_page = path_to_prev_page(scope, options)
 
-      link_to_if prev_page, name, prev_page, options.except(:params, :param_name).reverse_merge(rel: 'prev') do
+      options.except! :params, :param_name
+      options.reverse_merge! rel: 'prev'
+
+      link_to_if prev_page, name, prev_page, options do
         yield if block_given?
       end
     end
@@ -69,10 +73,13 @@ module Kaminari
     #   <%= link_to_next_page @users, 'Next Page' do %>
     #     <span>No More Pages</span>
     #   <% end %>
-    def link_to_next_page(scope, name, options = {})
+    def link_to_next_page(scope, name, **options)
       next_page = path_to_next_page(scope, options)
 
-      link_to_if next_page, name, next_page, options.except(:params, :param_name).reverse_merge(rel: 'next') do
+      options.except! :params, :param_name
+      options.reverse_merge! rel: 'next'
+
+      link_to_if next_page, name, next_page, options do
         yield if block_given?
       end
     end
diff --git a/kaminari-core/lib/kaminari/helpers/paginator.rb b/kaminari-core/lib/kaminari/helpers/paginator.rb
index cf3b96a..edf410c 100644
--- a/kaminari-core/lib/kaminari/helpers/paginator.rb
+++ b/kaminari-core/lib/kaminari/helpers/paginator.rb
@@ -7,14 +7,14 @@ module Kaminari
     # The main container tag
     class Paginator < Tag
       def initialize(template, window: nil, outer_window: nil, left: nil, right: nil, inner_window: nil, **options) #:nodoc:
-        @window_options = {}.tap do |h|
-          h[:window] = window || inner_window || Kaminari.config.window
-          outer_window = outer_window || Kaminari.config.outer_window
-          h[:left] = left || Kaminari.config.left
-          h[:left] = outer_window if h[:left] == 0
-          h[:right] = right || Kaminari.config.right
-          h[:right] = outer_window if h[:right] == 0
-        end
+        @window_options = {}
+        @window_options[:window] = window || inner_window || Kaminari.config.window
+        outer_window ||= Kaminari.config.outer_window
+        @window_options[:left] = left || Kaminari.config.left
+        @window_options[:left] = outer_window if @window_options[:left] == 0
+        @window_options[:right] = right || Kaminari.config.right
+        @window_options[:right] = outer_window if @window_options[:right] == 0
+
         @template, @options = template, options
         @theme = @options[:theme]
         @views_prefix = @options[:views_prefix]
diff --git a/kaminari-core/lib/kaminari/helpers/tags.rb b/kaminari-core/lib/kaminari/helpers/tags.rb
index dd08c37..73b8ec9 100644
--- a/kaminari-core/lib/kaminari/helpers/tags.rb
+++ b/kaminari-core/lib/kaminari/helpers/tags.rb
@@ -22,7 +22,9 @@ module Kaminari
         @params = template.params
         # @params in Rails 5 no longer inherits from Hash
         @params = @params.to_unsafe_h if @params.respond_to?(:to_unsafe_h)
-        @params = @params.with_indifferent_access.except(*PARAM_KEY_BLACKLIST).merge(params)
+        @params = @params.with_indifferent_access
+        @params.except!(*PARAM_KEY_BLACKLIST)
+        @params.merge! params
       end
 
       def to_s(locals = {}) #:nodoc:
@@ -31,7 +33,9 @@ module Kaminari
       end
 
       def page_url_for(page)
-        @template.url_for params_for(page).merge(only_path: true)
+        params = params_for(page)
+        params[:only_path] = true
+        @template.url_for params
       end
 
       private
@@ -76,7 +80,8 @@ module Kaminari
         page_url_for page
       end
       def to_s(locals = {}) #:nodoc:
-        super locals.merge(url: url)
+        locals[:url] = url
+        super locals
       end
     end
 
@@ -88,7 +93,8 @@ module Kaminari
         @options[:page]
       end
       def to_s(locals = {}) #:nodoc:
-        super locals.merge(page: page)
+        locals[:page] = page
+        super locals
       end
     end