diff --git a/app/models/dossier.rb b/app/models/dossier.rb
index 86fb24fc1..700c7da20 100644
--- a/app/models/dossier.rb
+++ b/app/models/dossier.rb
@@ -294,7 +294,7 @@ class Dossier < ActiveRecord::Base
     procedure.cerfa_flag? && cerfa.size != 0
   end
 
-  def convert_specific_values_to_string(hash_to_convert)
+  def convert_specific_hash_values_to_string(hash_to_convert)
     hash = {}
     hash_to_convert.each do |key, value|
       value = value.to_s if !value.kind_of?(Time) && !value.nil?
@@ -303,6 +303,15 @@ class Dossier < ActiveRecord::Base
     return hash
   end
 
+  def convert_specific_array_values_to_string(array_to_convert)
+    array = []
+    array_to_convert.each do |value|
+      value = value.to_s if !value.kind_of?(Time) && !value.nil?
+      array << value
+    end
+    return array
+  end
+
   def export_entreprise_data
     unless entreprise.nil?
       etablissement_attr = EtablissementCsvSerializer.new(self.etablissement).attributes.map { |k, v| ["etablissement.#{k}".parameterize.underscore.to_sym, v] }.to_h
@@ -311,12 +320,12 @@ class Dossier < ActiveRecord::Base
       etablissement_attr = EtablissementSerializer.new(Etablissement.new).attributes.map { |k, v| ["etablissement.#{k}".parameterize.underscore.to_sym, v] }.to_h
       entreprise_attr = EntrepriseSerializer.new(Entreprise.new).attributes.map { |k, v| ["entreprise.#{k}".parameterize.underscore.to_sym, v] }.to_h
     end
-    return convert_specific_values_to_string(etablissement_attr).merge(convert_specific_values_to_string(entreprise_attr))
+    return convert_specific_hash_values_to_string(etablissement_attr.merge(entreprise_attr))
   end
 
   def export_default_columns
     dossier_attr = DossierSerializer.new(self).attributes
-    dossier_attr = convert_specific_values_to_string(dossier_attr)
+    dossier_attr = convert_specific_hash_values_to_string(dossier_attr)
     dossier_attr = dossier_attr.merge(self.export_entreprise_data)
     return dossier_attr
   end
@@ -345,7 +354,7 @@ class Dossier < ActiveRecord::Base
     data = []
     headers = dossiers.first.export_headers
     dossiers.each do |dossier|
-      data << dossier.data_with_champs
+      data << dossier.convert_specific_array_values_to_string(data_with_champs)
     end
     if ["csv"].include?(format)
       return SpreadsheetArchitect.to_csv(data: data, headers: headers)
diff --git a/spec/models/dossier_spec.rb b/spec/models/dossier_spec.rb
index 8c53b2dba..0bd7f73a8 100644
--- a/spec/models/dossier_spec.rb
+++ b/spec/models/dossier_spec.rb
@@ -659,12 +659,12 @@ describe Dossier do
     end
   end
 
-  describe '#convert_specific_values_to_string(hash_to_convert)' do
+  describe '#convert_specific_hash_values_to_string(hash_to_convert)' do
     let(:procedure) { create(:procedure) }
     let(:dossier) { create(:dossier, :with_entreprise, user: user, procedure: procedure) }
     let(:dossier_serialized_attributes) { DossierSerializer.new(dossier).attributes }
 
-    subject { dossier.convert_specific_values_to_string(dossier_serialized_attributes) }
+    subject { dossier.convert_specific_hash_values_to_string(dossier_serialized_attributes) }
 
     it { expect(dossier_serialized_attributes[:id]).to be_an(Integer) }
     it { expect(dossier_serialized_attributes[:created_at]).to be_a(Time) }
@@ -681,6 +681,14 @@ describe Dossier do
     it { expect(subject[:state]).to be_a(String) }
   end
 
+  describe '#convert_specific_array_values_to_string(array_to_convert)' do
+    let(:procedure) { create(:procedure) }
+    let(:dossier) { create(:dossier, :with_entreprise, user: user, procedure: procedure) }
+    let(:dossier_data_with_champs) { dossier.data_with_champs }
+
+    subject { dossier.convert_specific_hash_values_to_string(dossier_data_with_champs) }
+  end
+
   describe '#export_entreprise_data' do
     let(:procedure) { create(:procedure) }
     let(:dossier) { create(:dossier, :with_entreprise, user: user, procedure: procedure) }
@@ -768,6 +776,12 @@ describe Dossier do
     let(:dossier) { create(:dossier, :with_entreprise, user: user, procedure: procedure) }
     subject { dossier.data_with_champs }
 
+    it do
+      binding.pry
+    end
+    it { expect(subject[0]).to be_a_kind_of(Integer)}
+    it { expect(subject[1]).to be_a_kind_of(Time)}
+    it { expect(subject[2]).to be_a_kind_of(Time)}
     it { expect(subject.count).to eq(DossierProcedureSerializer.new(dossier).attributes.count + dossier.procedure.types_de_champ.count + dossier.export_entreprise_data.count) }
   end