diff --git a/app/controllers/spree/admin/adjustments_controller_decorator.rb b/app/controllers/spree/admin/adjustments_controller_decorator.rb
index f822709e15..a45e3b4859 100644
--- a/app/controllers/spree/admin/adjustments_controller_decorator.rb
+++ b/app/controllers/spree/admin/adjustments_controller_decorator.rb
@@ -3,7 +3,7 @@ module Spree
     AdjustmentsController.class_eval do
       prepend_before_filter :set_included_tax, only: [:create, :update]
       before_filter :set_default_tax_rate, only: :edit
-
+      before_filter :enable_updates, only: :update
 
       private
 
@@ -38,6 +38,17 @@ module Spree
           params[:adjustment][:included_tax] = 0
         end
       end
+
+      # Spree 2.0 keeps shipping fee adjustments open unless they are manually
+      # closed. But open adjustments cannot be edited.
+      # To preserve updates, like changing the amount of the shipping fee,
+      # we close the adjustment first.
+      #
+      # The Spree admin interface allows to open and close adjustments manually
+      # but we removed that functionality as it had no purpose for us.
+      def enable_updates
+        @adjustment.close
+      end
     end
   end
 end
diff --git a/spec/features/admin/orders_spec.rb b/spec/features/admin/orders_spec.rb
index ad51abed4f..aecdd4e7c7 100644
--- a/spec/features/admin/orders_spec.rb
+++ b/spec/features/admin/orders_spec.rb
@@ -349,6 +349,16 @@ feature %q{
           end
         end
       end
+
+      scenario "editing shipping fees" do
+        click_link "Adjustments"
+        page.find('td.actions a.icon-edit').click
+
+        fill_in "Amount", with: "5"
+        click_button "Continue"
+
+        expect(page.find("td.amount")).to have_content "$5.00"
+      end
     end
 
     scenario "creating an order with distributor and order cycle" do