diff --git a/app/controllers/api/v1/csp_reports_controller.rb b/app/controllers/api/v1/csp_reports_controller.rb
index 1c1ef0a..bc6cfae 100644
--- a/app/controllers/api/v1/csp_reports_controller.rb
+++ b/app/controllers/api/v1/csp_reports_controller.rb
@@ -12,8 +12,8 @@ module Api
       # TODO: Aplicar rate_limit
       def create
         csp = CspReport.new(csp_report_params.to_h.map do |k, v|
-                              { k.tr('-', '_') => v }
-                            end.inject(&:merge))
+                              [k.tr('-', '_'), v]
+                            end.to_h)
 
         csp.id = SecureRandom.uuid
         csp.save
diff --git a/app/models/metadata_event.rb b/app/models/metadata_event.rb
index 89007dd..3213d87 100644
--- a/app/models/metadata_event.rb
+++ b/app/models/metadata_event.rb
@@ -61,13 +61,13 @@ class MetadataEvent < MetadataTemplate
     self[:value] = %w[dtstart dtend].map do |dt|
       time = hash.dig(dt, 'time')
 
-      {
-        dt => {
+      [
+        dt, {
           'zone' => hash.dig(dt, 'zone'),
           'date' => Date.parse(hash.dig(dt, 'date')).to_s,
           'time' => time.blank? ? '00:00' : time
         }
-      }
-    end.inject(:merge)
+      ]
+    end.to_h
   end
 end
diff --git a/app/models/metadata_locales.rb b/app/models/metadata_locales.rb
index 6498ed7..8958110 100644
--- a/app/models/metadata_locales.rb
+++ b/app/models/metadata_locales.rb
@@ -14,11 +14,9 @@ class MetadataLocales < MetadataTemplate
   # @return { lang: { title: uuid } }
   def values
     @values ||= site.locales.map do |locale|
-      {
-        locale.to_sym => site.posts(lang: locale).map do |post|
-          { post.title.value => post.uuid.value }
-        end.inject(:merge)
-      }
-    end.inject(:merge)
+      [locale.to_sym, site.posts(lang: locale).map do |post|
+                        [post.title.value, post.uuid.value]
+                      end.to_h]
+    end.to_h
   end
 end
diff --git a/app/models/metadata_predefined_array.rb b/app/models/metadata_predefined_array.rb
index a6e2105..829a8a2 100644
--- a/app/models/metadata_predefined_array.rb
+++ b/app/models/metadata_predefined_array.rb
@@ -4,7 +4,7 @@
 class MetadataPredefinedArray < MetadataArray
   def values
     @values ||= layout[:metadata][name]['values'].map do |k, v|
-      { v[I18n.locale.to_s] => k }
-    end.inject(&:merge)
+      [v[I18n.locale.to_s], k]
+    end.to_h
   end
 end
diff --git a/app/models/metadata_related_posts.rb b/app/models/metadata_related_posts.rb
index e38538a..5148a9f 100644
--- a/app/models/metadata_related_posts.rb
+++ b/app/models/metadata_related_posts.rb
@@ -4,10 +4,11 @@
 # idioma que el actual, para usar con input-map.js
 class MetadataRelatedPosts < MetadataArray
   # Genera un Hash de { title | slug => uuid }
+  # @return [Hash]
   def values
     @values ||= posts.map do |p|
-      { title(p) => p.uuid.value }
-    end.inject(:merge)
+      [title(p), p.uuid.value]
+    end.to_h
   end
 
   # Las relaciones nunca son privadas
diff --git a/app/models/post.rb b/app/models/post.rb
index c238ece..f43c02e 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -205,8 +205,8 @@ class Post < OpenStruct
 
       next if template.empty?
 
-      { metadata.to_s => template.value }
-    end.compact.inject(:merge)
+      [metadata.to_s, template.value]
+    end.compact.to_h
 
     # TODO: Convertir a Metadata?
     # Asegurarse que haya un layout
diff --git a/app/models/site.rb b/app/models/site.rb
index daa83c4..38645a3 100644
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -265,10 +265,8 @@ class Site < ApplicationRecord
     # NoMethodError
     @layouts_struct ||= Struct.new(*layout_keys, keyword_init: true)
     @layouts ||= @layouts_struct.new(**data.fetch('layouts', {}).map do |name, metadata|
-      { name.to_sym => Layout.new(site: self,
-                                  name: name.to_sym,
-                                  metadata: metadata.with_indifferent_access) }
-    end.inject(:merge))
+      [name.to_sym, Layout.new(site: self, name: name.to_sym, metadata: metadata.with_indifferent_access)]
+    end.to_h)
   end
 
   def layout_keys