diff --git a/app/controllers/admin/budget_investments_controller.rb b/app/controllers/admin/budget_investments_controller.rb
index 8f0fa3dca..a55c04a01 100644
--- a/app/controllers/admin/budget_investments_controller.rb
+++ b/app/controllers/admin/budget_investments_controller.rb
@@ -39,16 +39,25 @@ class Admin::BudgetInvestmentsController < Admin::BaseController
 
   def update
     authorize! :admin_update, @investment
-    if @investment.update(budget_investment_params)
-      redirect_to admin_budget_budget_investment_path(@budget,
-                                                      @investment,
-                                                      Budget::Investment.filter_params(params).to_h),
-                  notice: t("flash.actions.update.budget_investment")
-    else
-      load_staff
-      load_valuator_groups
-      load_tags
-      render :edit
+
+    respond_to do |format|
+      format.html do
+        if @investment.update(budget_investment_params)
+          redirect_to admin_budget_budget_investment_path(@budget,
+                                                          @investment,
+                                                          Budget::Investment.filter_params(params).to_h),
+                      notice: t("flash.actions.update.budget_investment")
+        else
+          load_staff
+          load_valuator_groups
+          load_tags
+          render :edit
+        end
+      end
+
+      format.json do
+        @investment.update!(budget_investment_params)
+      end
     end
   end
 
diff --git a/app/views/admin/budget_investments/_select_investment.html.erb b/app/views/admin/budget_investments/_select_investment.html.erb
index 698aab1dc..a7593a0c5 100644
--- a/app/views/admin/budget_investments/_select_investment.html.erb
+++ b/app/views/admin/budget_investments/_select_investment.html.erb
@@ -51,7 +51,7 @@
 </td>
 
 <td class="small text-center" data-field="visible_to_valuators">
-  <%= form_for [:admin, investment.budget, investment], remote: true do |f| %>
+  <%= form_for [:admin, investment.budget, investment], remote: true, format: :json do |f| %>
       <%= f.check_box :visible_to_valuators,
                       label: false,
                       class: "js-submit-on-change",
diff --git a/spec/controllers/admin/budget_investments_controller_spec.rb b/spec/controllers/admin/budget_investments_controller_spec.rb
new file mode 100644
index 000000000..3d0c1fddc
--- /dev/null
+++ b/spec/controllers/admin/budget_investments_controller_spec.rb
@@ -0,0 +1,19 @@
+require "rails_helper"
+
+describe Admin::BudgetInvestmentsController do
+  describe "PATCH update" do
+    it "does not redirect on AJAX requests" do
+      investment = create(:budget_investment)
+      sign_in(create(:administrator).user)
+
+      patch :update, params: {
+        id: investment,
+        budget_id: investment.budget,
+        format: :json,
+        budget_investment: { visible_to_valuators: true }
+      }
+
+      expect(response).not_to be_redirect
+    end
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 5a775065f..1996c2bb1 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -14,6 +14,7 @@ RSpec.configure do |config|
   config.run_all_when_everything_filtered = true
   config.include RequestSpecHelper, type: :request
   config.include Devise::Test::ControllerHelpers, type: :controller
+  config.include Devise::Test::ControllerHelpers, type: :view
   config.include FactoryBot::Syntax::Methods
   config.include(EmailSpec::Helpers)
   config.include(EmailSpec::Matchers)
diff --git a/spec/views/admin/budget_investments/select_investment_spec.rb b/spec/views/admin/budget_investments/select_investment_spec.rb
new file mode 100644
index 000000000..e04c6dd8f
--- /dev/null
+++ b/spec/views/admin/budget_investments/select_investment_spec.rb
@@ -0,0 +1,13 @@
+require "rails_helper"
+
+describe "investment row" do
+  it "uses a JSON request to update visible to valuators" do
+    investment = create(:budget_investment)
+    @budget = investment.budget
+    sign_in(create(:administrator).user)
+
+    render "admin/budget_investments/select_investment", investment: investment
+
+    expect(rendered).to have_css "form[action$='json'] input[name$='[visible_to_valuators]']"
+  end
+end