diff --git a/app/forms/concerns/decidim/proposals/admin/proposal_form_override.rb b/app/forms/concerns/decidim/proposals/admin/proposal_form_override.rb
new file mode 100644
index 0000000..7cb6864
--- /dev/null
+++ b/app/forms/concerns/decidim/proposals/admin/proposal_form_override.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module Decidim
+  module Proposals
+    module Admin
+      module ProposalFormOverride
+        extend ActiveSupport::Concern
+
+        included do
+          translatable_attribute :title, String do |field, _locale|
+            validates field, length: { in: 15..250 }, if: proc { |resource| resource.send(field).present? }
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/app/forms/concerns/decidim/proposals/proposal_wizard_create_step_form_override.rb b/app/forms/concerns/decidim/proposals/proposal_wizard_create_step_form_override.rb
new file mode 100644
index 0000000..a9d4c74
--- /dev/null
+++ b/app/forms/concerns/decidim/proposals/proposal_wizard_create_step_form_override.rb
@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module Decidim
+  module Proposals
+    module ProposalWizardCreateStepFormOverride
+      extend ActiveSupport::Concern
+
+      included do
+        validates :title, length: { in: 15..250 }
+      end
+    end
+  end
+end
diff --git a/config/initializers/decidim_overrides.rb b/config/initializers/decidim_overrides.rb
new file mode 100644
index 0000000..a012c62
--- /dev/null
+++ b/config/initializers/decidim_overrides.rb
@@ -0,0 +1,6 @@
+# frozen_string_literal: true
+
+Rails.application.config.to_prepare do
+  Decidim::Proposals::ProposalWizardCreateStepForm.include(Decidim::Proposals::ProposalWizardCreateStepFormOverride)
+  Decidim::Proposals::Admin::ProposalForm.include(Decidim::Proposals::Admin::ProposalFormOverride)
+end
diff --git a/config/initializers/extend_proposal_title_size.rb b/config/initializers/extend_proposal_title_size.rb
deleted file mode 100644
index 1a74c13..0000000
--- a/config/initializers/extend_proposal_title_size.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-# frozen_string_literal: true
-
-# extends the title size to 250 characters
-Rails.application.configure do
-  config.after_initialize do
-    Decidim::Proposals::ProposalWizardCreateStepForm
-      .validators_on(:title).find { |v| v.is_a?(ActiveModel::Validations::LengthValidator) }
-      .instance_variable_set(:@options, { maximum: 250 })
-    Decidim.available_locales.each do |locale|
-      Decidim::Proposals::Admin::ProposalForm
-        .validators_on("title_#{locale}".to_sym).find { |v| v.is_a?(ActiveModel::Validations::LengthValidator) }
-        .instance_variable_set(:@options, { maximum: 250 })
-    end
-  end
-end
diff --git a/spec/lib/overrides_spec.rb b/spec/lib/overrides_spec.rb
index ca4030e..1616344 100644
--- a/spec/lib/overrides_spec.rb
+++ b/spec/lib/overrides_spec.rb
@@ -6,6 +6,13 @@
 # as the expected. If this test fails, it means that the overriden
 # file should be updated to match any change/bug fix introduced in the core
 checksums = [
+  {
+    package: "decidim-proposals",
+    files: {
+      "/app/forms/decidim/proposals/proposal_wizard_create_step_form.rb" => "b495d37088ecebcbe4ac9563bb3498d5",
+      "/app/forms/decidim/proposals/admin/proposal_form.rb" => "fc671fc489c75bb3c190b1da09689c67"
+    }
+  },
   {
     package: "decidim-direct_verifications",
     files: {