diff --git a/app/serializers/individual_serializer.rb b/app/serializers/individual_serializer.rb
index b35e01892..b7b3032a5 100644
--- a/app/serializers/individual_serializer.rb
+++ b/app/serializers/individual_serializer.rb
@@ -1,3 +1,9 @@
 class IndividualSerializer < ActiveModel::Serializer
+  attribute :gender, key: :civilite
   attributes :nom, :prenom
+  attribute :birthdate, key: :date_naissance, if: :include_birthdate?
+
+  def include_birthdate?
+    object&.dossier&.procedure&.ask_birthday
+  end
 end
diff --git a/spec/serializers/individual_serializer_spec.rb b/spec/serializers/individual_serializer_spec.rb
index f86b801a2..0617957f3 100644
--- a/spec/serializers/individual_serializer_spec.rb
+++ b/spec/serializers/individual_serializer_spec.rb
@@ -1,10 +1,20 @@
 describe IndividualSerializer do
   describe '#attributes' do
-    let(:individual){ Individual.create(nom: 'nom', prenom: 'prenom') }
+    let(:procedure) { build(:procedure) }
+    let(:dossier) { build(:dossier, procedure: procedure) }
+    let(:individual) { build(:individual, gender: 'M.', nom: 'nom', prenom: 'prenom', birthdate: Date.new(2001, 8, 27), dossier: dossier) }
 
     subject { IndividualSerializer.new(individual).serializable_hash }
 
+    it { is_expected.to include(civilite: 'M.') }
     it { is_expected.to include(nom: 'nom') }
     it { is_expected.to include(prenom: 'prenom') }
+    it { is_expected.not_to have_key(:date_naissance) }
+
+    context 'when the procedure asks for a birthdate' do
+      let(:procedure) { build(:procedure, ask_birthday: true) }
+
+      it { is_expected.to include(date_naissance: Date.new(2001, 8, 27)) }
+    end
   end
 end