diff --git a/lib/mongoid-denormalize.rb b/lib/mongoid-denormalize.rb
index beb6a27..d1452a3 100644
--- a/lib/mongoid-denormalize.rb
+++ b/lib/mongoid-denormalize.rb
@@ -55,7 +55,11 @@ def self.add_hook_to_child(child_class, fields, options)
       from = options[:from].to_s
 
       child_class.send(options[:child_callback] || 'before_save') do
-        if send("#{from}_id_changed?")
+        any_field_changed = fields.select do |field|
+          send("#{field[:as]}_changed?")
+        end
+
+        if send("#{from}_id_changed?") || any_field_changed
           fields.each do |field|
             send("#{field[:as]}=", send(from)&.send(field[:name]))
           end
diff --git a/spec/mongoid/denormalize_spec.rb b/spec/mongoid/denormalize_spec.rb
index 5dbfa14..e53378c 100644
--- a/spec/mongoid/denormalize_spec.rb
+++ b/spec/mongoid/denormalize_spec.rb
@@ -60,6 +60,16 @@ class Child
             end
           end
 
+          context 'when updates children denormalized field' do
+            it 'updates childs denormalized fields' do
+              parent = Parent.create!(name: 'parent')
+              child = Child.create!(parent: parent)
+
+              child.update_attributes(parent_name: 'new_name')
+              expect(child.reload.parent_name).to eq('parent')
+            end
+          end
+
           context 'when updates relation' do
             it 'updates denormalized fields' do
               parent = Parent.create!(name: 'parent')
@@ -193,13 +203,21 @@ class Child
                 )
               end
 
-              it 'updates childs denormalized fields' do
+              it 'updates parent denormalized fields' do
                 parent = Parent.create!(name: 'parent')
                 child = Child.create!(parent: parent)
 
                 parent.update_attributes(name: 'new_name')
                 expect(child.reload.parent_name).to eq('new_name')
               end
+
+              it 'updates child denormalized fields' do
+                parent = Parent.create!(name: 'parent')
+                child = Child.create!(parent: parent)
+
+                child.update_attributes(parent_name: 'new_name')
+                expect(child.reload.parent_name).to eq('parent')
+              end
             end
           end
         end
@@ -240,7 +258,7 @@ class Child
           end
 
           context 'when child exists' do
-            it 'updates childs denormalized fields' do
+            it 'updates parent denormalized fields' do
               parent = Parent.create!(name: 'parent')
               child = Child.create!(parent: parent)
 
@@ -255,6 +273,14 @@ class Child
               child.update_attributes(parent: nil)
               expect(child.reload.parent_name).to eq(nil)
             end
+
+            it 'updates child denormalized fields' do
+              parent = Parent.create!(name: 'parent')
+              child = Child.create!(parent: parent)
+
+              child.update_attributes(parent_name: 'new_name')
+              expect(child.reload.parent_name).to eq('parent')
+            end
           end
 
           context 'when child does not exist' do