diff --git a/app/serializers/dossiers_serializer.rb b/app/serializers/dossiers_serializer.rb
index e43f4b63d..34110603e 100644
--- a/app/serializers/dossiers_serializer.rb
+++ b/app/serializers/dossiers_serializer.rb
@@ -1,4 +1,5 @@
 class DossiersSerializer < ActiveModel::Serializer
   attributes :id,
-    :updated_at
+    :updated_at,
+    :initiated_at
 end
diff --git a/doc/apipie_examples.json b/doc/apipie_examples.json
index e88b2a84c..b5a9928b5 100644
--- a/doc/apipie_examples.json
+++ b/doc/apipie_examples.json
@@ -13,7 +13,8 @@
           {
             "id": 2,
             "nom_projet": "Demande de subvention dans le cadre d'accompagnement d'enfant à l'étranger",
-            "updated_at": "2008-09-01T08:05:00.000Z"
+            "updated_at": "2008-09-01T08:05:00.000Z",
+            "initiated_at": "2008-09-02T08:05:00.000Z"
           }
         ],
         "pagination": {
diff --git a/spec/controllers/api/v1/dossiers_controller_spec.rb b/spec/controllers/api/v1/dossiers_controller_spec.rb
index 63c293550..e43343325 100644
--- a/spec/controllers/api/v1/dossiers_controller_spec.rb
+++ b/spec/controllers/api/v1/dossiers_controller_spec.rb
@@ -25,7 +25,7 @@ describe API::V1::DossiersController do
     context 'when procedure is found and belongs to admin' do
       let(:procedure_id) { procedure.id }
       let(:date_creation) { Time.utc(2008, 9, 1, 10, 5, 0) }
-      let!(:dossier) { Timecop.freeze(date_creation) { create(:dossier, :with_entreprise, procedure: procedure, state: 'initiated') } }
+      let!(:dossier) { Timecop.freeze(date_creation) { create(:dossier, :with_entreprise, :initiated, procedure: procedure) } }
       let(:body) { JSON.parse(retour.body, symbolize_names: true) }
 
       it 'return REST code 200', :show_in_doc do
@@ -53,7 +53,8 @@ describe API::V1::DossiersController do
           subject { super().first }
           it { expect(subject[:id]).to eq(dossier.id) }
           it { expect(subject[:updated_at]).to eq("2008-09-01T10:05:00.000Z") }
-          it { expect(subject.keys.size).to eq(2) }
+          it { expect(subject[:initiated_at]).to eq("2008-09-01T10:06:00.000Z") }
+          it { expect(subject.keys.size).to eq(3) }
         end
       end
 
diff --git a/spec/factories/dossier.rb b/spec/factories/dossier.rb
index 036d498ca..231e8e8ce 100644
--- a/spec/factories/dossier.rb
+++ b/spec/factories/dossier.rb
@@ -73,7 +73,11 @@ FactoryGirl.define do
     end
 
     trait :initiated do
-      state 'initiated'
+      after(:create) do |dossier, _evaluator|
+        dossier.state = 'initiated'
+        dossier.initiated_at = dossier.created_at + 1.minute
+        dossier.save!
+      end
     end
   end
 end