diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index a7afe1f73..407e44efe 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -32,6 +32,7 @@
 #  lien_notice                               :string
 #  lien_site_web                             :string
 #  monavis_embed                             :text
+#  opendata                                  :boolean          default(TRUE)
 #  organisation                              :string
 #  path                                      :string           not null
 #  procedure_expires_when_termine_enabled    :boolean          default(TRUE)
diff --git a/db/migrate/20220622181047_add_opendata_to_procedures.rb b/db/migrate/20220622181047_add_opendata_to_procedures.rb
new file mode 100644
index 000000000..2f93f8c50
--- /dev/null
+++ b/db/migrate/20220622181047_add_opendata_to_procedures.rb
@@ -0,0 +1,10 @@
+class AddOpendataToProcedures < ActiveRecord::Migration[6.1]
+  def up
+    add_column :procedures, :opendata, :boolean
+    change_column_default :procedures, :opendata, true
+  end
+
+  def down
+    remove_column :procedures, :opendata
+  end
+end
diff --git a/db/migrate/20220622183305_backfill_add_opendata_to_procedures.rb b/db/migrate/20220622183305_backfill_add_opendata_to_procedures.rb
new file mode 100644
index 000000000..6882b9224
--- /dev/null
+++ b/db/migrate/20220622183305_backfill_add_opendata_to_procedures.rb
@@ -0,0 +1,10 @@
+class BackfillAddOpendataToProcedures < ActiveRecord::Migration[6.1]
+  disable_ddl_transaction!
+
+  def change
+    Procedure.in_batches do |relation|
+      relation.update_all opendata: true
+      sleep(0.01)
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 182a6c01b..01ceabc9d 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2022_06_21_160241) do
+ActiveRecord::Schema.define(version: 2022_06_22_183305) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pgcrypto"
@@ -651,6 +651,7 @@ ActiveRecord::Schema.define(version: 2022_06_21_160241) do
     t.string "lien_notice"
     t.string "lien_site_web"
     t.text "monavis_embed"
+    t.boolean "opendata", default: true
     t.string "organisation"
     t.bigint "parent_procedure_id"
     t.string "path", null: false
diff --git a/spec/models/procedure_spec.rb b/spec/models/procedure_spec.rb
index 568e24c81..ddf7a2ff1 100644
--- a/spec/models/procedure_spec.rb
+++ b/spec/models/procedure_spec.rb
@@ -381,6 +381,14 @@ describe Procedure do
     end
   end
 
+  describe 'opendata' do
+    let(:procedure) { create(:procedure) }
+
+    it 'is true by default' do
+      expect(procedure.opendata).to be_truthy
+    end
+  end
+
   describe 'active' do
     let(:procedure) { create(:procedure) }
     subject { Procedure.active(procedure.id) }