diff --git a/app/services/procedure_export_v2_service.rb b/app/services/procedure_export_v2_service.rb
index 2a14615fa..f29a5b1d2 100644
--- a/app/services/procedure_export_v2_service.rb
+++ b/app/services/procedure_export_v2_service.rb
@@ -70,6 +70,10 @@ class ProcedureExportV2Service
     row_style: { background_color: nil, color: "000000", font_size: 12 }
   }
 
+  def sanitize_sheet_name(name)
+    ActiveStorage::Filename.new(name.to_s).sanitized.truncate(30)
+  end
+
   def options_for(table)
     case table
     when :dossiers
@@ -80,7 +84,7 @@ class ProcedureExportV2Service
       { instances: avis.to_a, sheet_name: 'Avis' }.merge(DEFAULT_STYLES)
     when Array
       # We have to truncate the label here as spreadsheets have a (30 char) limit on length.
-      { instances: table.last, sheet_name: table.first.to_s.truncate(30) }.merge(DEFAULT_STYLES)
+      { instances: table.last, sheet_name: sanitize_sheet_name(table.first) }.merge(DEFAULT_STYLES)
     end
   end
 end
diff --git a/spec/services/procedure_export_v2_service_spec.rb b/spec/services/procedure_export_v2_service_spec.rb
index d0dfa759a..79dd7aa0c 100644
--- a/spec/services/procedure_export_v2_service_spec.rb
+++ b/spec/services/procedure_export_v2_service_spec.rb
@@ -184,6 +184,16 @@ describe ProcedureExportV2Service do
       it 'should have data' do
         expect(repetition_sheet.data.size).to eq(4)
       end
+
+      context 'with invalid characters' do
+        before do
+          champ_repetition.type_de_champ.update(libelle: 'A / B \ C')
+        end
+
+        it 'should have valid sheet name' do
+          expect(subject.sheets.map(&:name)).to eq(['Dossiers', 'Etablissements', 'Avis', "A - B - C"])
+        end
+      end
     end
   end
 end