diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 2dbf889ef4..61b2cbfef9 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -14,10 +14,6 @@ Bundler/OrderedGems:
   Exclude:
     - 'Gemfile'
 
-# Offense count: 48
-Lint/AmbiguousOperator:
-  Enabled: false
-
 # Offense count: 8
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyleAlignWith, SupportedStylesAlignWith.
diff --git a/app/models/model_set.rb b/app/models/model_set.rb
index 0c0d156179..cb75f929ab 100644
--- a/app/models/model_set.rb
+++ b/app/models/model_set.rb
@@ -36,8 +36,8 @@ class ModelSet
   end
 
   def save
-    collection_to_delete.each &:destroy
-    collection_to_keep.all? &:save
+    collection_to_delete.each(&:destroy)
+    collection_to_keep.all?(&:save)
   end
 
   def collection_to_delete
diff --git a/app/models/spree/option_type_decorator.rb b/app/models/spree/option_type_decorator.rb
index aea706c847..e3ca3b30de 100644
--- a/app/models/spree/option_type_decorator.rb
+++ b/app/models/spree/option_type_decorator.rb
@@ -7,7 +7,7 @@ module Spree
     private
 
     def refresh_products_cache
-      products(:reload).each &:refresh_products_cache
+      products(:reload).each(&:refresh_products_cache)
     end
   end
 end
diff --git a/app/models/spree/option_value_decorator.rb b/app/models/spree/option_value_decorator.rb
index cfe9c23cca..5420af811c 100644
--- a/app/models/spree/option_value_decorator.rb
+++ b/app/models/spree/option_value_decorator.rb
@@ -7,13 +7,13 @@ module Spree
     private
 
     def refresh_products_cache
-      variants(:reload).each &:refresh_products_cache
+      variants(:reload).each(&:refresh_products_cache)
     end
 
     def refresh_products_cache_from_destroy
       vs = variants(:reload).to_a
       yield
-      vs.each &:refresh_products_cache
+      vs.each(&:refresh_products_cache)
     end
 
   end
diff --git a/app/models/spree/order_decorator.rb b/app/models/spree/order_decorator.rb
index 82bba48f2e..41a70383bc 100644
--- a/app/models/spree/order_decorator.rb
+++ b/app/models/spree/order_decorator.rb
@@ -161,7 +161,7 @@ Spree::Order.class_eval do
   end
 
   def cap_quantity_at_stock!
-    line_items.each &:cap_quantity_at_stock!
+    line_items.each(&:cap_quantity_at_stock!)
   end
 
   def set_distributor!(distributor)
diff --git a/app/models/spree/product_decorator.rb b/app/models/spree/product_decorator.rb
index 724101964b..3173304f41 100644
--- a/app/models/spree/product_decorator.rb
+++ b/app/models/spree/product_decorator.rb
@@ -216,7 +216,7 @@ Spree::Product.class_eval do
     if variant_unit_changed?
       option_types.delete self.class.all_variant_unit_option_types
       option_types << variant_unit_option_type if variant_unit.present?
-      variants_including_master.each &:update_units
+      variants_including_master.each(&:update_units)
     end
   end
 
diff --git a/app/models/spree/product_option_type_decorator.rb b/app/models/spree/product_option_type_decorator.rb
index e091b62efa..6410c014a4 100644
--- a/app/models/spree/product_option_type_decorator.rb
+++ b/app/models/spree/product_option_type_decorator.rb
@@ -4,7 +4,7 @@ Spree::ProductOptionType.class_eval do
   def remove_option_values
     self.product.variants_including_master.each do |variant|
       option_values = variant.option_values.where(option_type_id: self.option_type)
-      variant.option_values.destroy *option_values
+      variant.option_values.destroy(*option_values)
     end
   end
 end
diff --git a/app/models/spree/property_decorator.rb b/app/models/spree/property_decorator.rb
index 81577cef4e..7349436a2b 100644
--- a/app/models/spree/property_decorator.rb
+++ b/app/models/spree/property_decorator.rb
@@ -30,7 +30,7 @@ module Spree
     private
 
     def refresh_products_cache
-      product_properties(:reload).each &:refresh_products_cache
+      product_properties(:reload).each(&:refresh_products_cache)
     end
   end
 end
diff --git a/app/models/spree/taxon_decorator.rb b/app/models/spree/taxon_decorator.rb
index fcc71a92dc..71da03ccbf 100644
--- a/app/models/spree/taxon_decorator.rb
+++ b/app/models/spree/taxon_decorator.rb
@@ -57,6 +57,6 @@ Spree::Taxon.class_eval do
   private
 
   def refresh_products_cache
-    products(:reload).each &:refresh_products_cache
+    products(:reload).each(&:refresh_products_cache)
   end
 end
diff --git a/lib/open_food_network/order_cycle_form_applicator.rb b/lib/open_food_network/order_cycle_form_applicator.rb
index 1df429b4fb..2573d52aa6 100644
--- a/lib/open_food_network/order_cycle_form_applicator.rb
+++ b/lib/open_food_network/order_cycle_form_applicator.rb
@@ -172,7 +172,7 @@ module OpenFoodNetwork
     end
 
     def incoming_variant_ids
-      @order_cycle.supplied_variants.map &:id
+      @order_cycle.supplied_variants.map(&:id)
     end
 
     def variants_to_a(variants)
diff --git a/lib/open_food_network/reports/bulk_coop_allocation_report.rb b/lib/open_food_network/reports/bulk_coop_allocation_report.rb
index 11fb3070f8..2b5454ef75 100644
--- a/lib/open_food_network/reports/bulk_coop_allocation_report.rb
+++ b/lib/open_food_network/reports/bulk_coop_allocation_report.rb
@@ -6,7 +6,7 @@ module OpenFoodNetwork::Reports
 
     organise do
       group { |li| li.product }
-      sort &:name
+      sort(&:name)
 
       summary_row do
         column { |lis| "TOTAL" }
diff --git a/lib/open_food_network/reports/bulk_coop_supplier_report.rb b/lib/open_food_network/reports/bulk_coop_supplier_report.rb
index b37e8d00a5..ce789630a6 100644
--- a/lib/open_food_network/reports/bulk_coop_supplier_report.rb
+++ b/lib/open_food_network/reports/bulk_coop_supplier_report.rb
@@ -6,11 +6,11 @@ module OpenFoodNetwork::Reports
 
     organise do
       group { |li| li.product.supplier }
-      sort &:name
+      sort(&:name)
 
       organise do
         group { |li| li.product }
-        sort &:name
+        sort(&:name)
 
         summary_row do
           column { |lis| supplier_name(lis) }
diff --git a/lib/open_food_network/reports/report.rb b/lib/open_food_network/reports/report.rb
index 461c350e73..2bf0a48fbb 100644
--- a/lib/open_food_network/reports/report.rb
+++ b/lib/open_food_network/reports/report.rb
@@ -24,7 +24,7 @@ module OpenFoodNetwork::Reports
         rule = rule.next
       end
 
-      rules.map &:to_h
+      rules.map(&:to_h)
     end
 
     # -- DSL
diff --git a/lib/open_food_network/sales_tax_report.rb b/lib/open_food_network/sales_tax_report.rb
index 442286a61a..2d85411fa1 100644
--- a/lib/open_food_network/sales_tax_report.rb
+++ b/lib/open_food_network/sales_tax_report.rb
@@ -97,7 +97,7 @@ module OpenFoodNetwork
     end
 
     def tax_included_in(line_item)
-      line_item.adjustments.sum &:included_tax
+      line_item.adjustments.sum(&:included_tax)
     end
 
     def shipment_inc_vat
diff --git a/lib/open_food_network/user_balance_calculator.rb b/lib/open_food_network/user_balance_calculator.rb
index 32cd00c90c..ba9d089452 100644
--- a/lib/open_food_network/user_balance_calculator.rb
+++ b/lib/open_food_network/user_balance_calculator.rb
@@ -12,11 +12,11 @@ module OpenFoodNetwork
     private
 
     def completed_order_total
-      completed_orders.sum &:total
+      completed_orders.sum(&:total)
     end
 
     def payment_total
-      payments.sum &:amount
+      payments.sum(&:amount)
     end
 
     def completed_orders
diff --git a/lib/open_food_network/variant_and_line_item_naming.rb b/lib/open_food_network/variant_and_line_item_naming.rb
index 47b9f58936..42c78a80dc 100644
--- a/lib/open_food_network/variant_and_line_item_naming.rb
+++ b/lib/open_food_network/variant_and_line_item_naming.rb
@@ -11,7 +11,7 @@ module OpenFoodNetwork
     def options_text
       values = self.option_values.joins(:option_type).order("#{Spree::OptionType.table_name}.position asc")
 
-      values.map! &:presentation    # This line changed
+      values.map!(&:presentation)    # This line changed
 
       values.to_sentence({ :words_connector => ", ", :two_words_connector => ", " })
     end
diff --git a/lib/open_food_network/xero_invoices_report.rb b/lib/open_food_network/xero_invoices_report.rb
index cab44aa55e..2614f61dfb 100644
--- a/lib/open_food_network/xero_invoices_report.rb
+++ b/lib/open_food_network/xero_invoices_report.rb
@@ -175,27 +175,27 @@ module OpenFoodNetwork
     end
 
     def total_untaxable_products(order)
-      order.line_items.without_tax.sum &:amount
+      order.line_items.without_tax.sum(&:amount)
     end
 
     def total_taxable_products(order)
-      order.line_items.with_tax.sum &:amount
+      order.line_items.with_tax.sum(&:amount)
     end
 
     def total_untaxable_fees(order)
-      order.adjustments.enterprise_fee.without_tax.sum &:amount
+      order.adjustments.enterprise_fee.without_tax.sum(&:amount)
     end
 
     def total_taxable_fees(order)
-      order.adjustments.enterprise_fee.with_tax.sum &:amount
+      order.adjustments.enterprise_fee.with_tax.sum(&:amount)
     end
 
     def total_shipping(order)
-      order.adjustments.shipping.sum &:amount
+      order.adjustments.shipping.sum(&:amount)
     end
 
     def total_transaction(order)
-      order.adjustments.payment_fee.sum &:amount
+      order.adjustments.payment_fee.sum(&:amount)
     end
 
     def tax_on_shipping_s(order)
@@ -204,11 +204,11 @@ module OpenFoodNetwork
     end
 
     def total_untaxable_admin_adjustments(order)
-      order.adjustments.admin.without_tax.sum &:amount
+      order.adjustments.admin.without_tax.sum(&:amount)
     end
 
     def total_taxable_admin_adjustments(order)
-      order.adjustments.admin.with_tax.sum &:amount
+      order.adjustments.admin.with_tax.sum(&:amount)
     end
 
     def detail?
diff --git a/spec/features/admin/order_cycles_spec.rb b/spec/features/admin/order_cycles_spec.rb
index 2f826b51c4..d59b203ce6 100644
--- a/spec/features/admin/order_cycles_spec.rb
+++ b/spec/features/admin/order_cycles_spec.rb
@@ -181,7 +181,7 @@ feature %q{
     scenario "updating an order cycle", js: true do
       # Given an order cycle with all the settings
       oc = create(:order_cycle)
-      initial_variants = oc.variants.sort_by &:id
+      initial_variants = oc.variants.sort_by(&:id)
 
       # And a coordinating, supplying and distributing enterprise with some products with variants
       coordinator = oc.coordinator
diff --git a/spec/jobs/update_account_invoices_spec.rb b/spec/jobs/update_account_invoices_spec.rb
index ad1a466d49..d9a2beca6b 100644
--- a/spec/jobs/update_account_invoices_spec.rb
+++ b/spec/jobs/update_account_invoices_spec.rb
@@ -106,7 +106,7 @@ describe UpdateAccountInvoices do
           end
 
           context "that starts in the future" do
-            travel_to -1.days
+            travel_to(-1.days)
 
             it "snags an error and does not update invoices" do
               updater.perform
diff --git a/spec/lib/open_food_network/reports/report_spec.rb b/spec/lib/open_food_network/reports/report_spec.rb
index 0421320119..2f06e3782e 100644
--- a/spec/lib/open_food_network/reports/report_spec.rb
+++ b/spec/lib/open_food_network/reports/report_spec.rb
@@ -10,23 +10,23 @@ module OpenFoodNetwork::Reports
     header 'One', 'Two', 'Three', 'Four'
 
     columns do
-      column &P1
-      column &P2
-      column &P3
-      column &P4
+      column(&P1)
+      column(&P2)
+      column(&P3)
+      column(&P4)
     end
 
     organise do
-      group &P1
-      sort  &P2
+      group(&P1)
+      sort(&P2)
 
       organise do
-        group &P3
-        sort  &P4
+        group(&P3)
+        sort(&P4)
 
         summary_row do
-          column &P1
-          column &P4
+          column(&P1)
+          column(&P4)
         end
       end
     end
diff --git a/spec/lib/open_food_network/reports/row_spec.rb b/spec/lib/open_food_network/reports/row_spec.rb
index deaa84e491..8643399a69 100644
--- a/spec/lib/open_food_network/reports/row_spec.rb
+++ b/spec/lib/open_food_network/reports/row_spec.rb
@@ -6,9 +6,9 @@ module OpenFoodNetwork::Reports
     let(:proc) { Proc.new {} }
 
     it "can define a number of columns and return them as an array" do
-      row.column &proc
-      row.column &proc
-      row.column &proc
+      row.column(&proc)
+      row.column(&proc)
+      row.column(&proc)
 
       row.to_a.should == [proc, proc, proc]
     end
diff --git a/spec/lib/open_food_network/reports/rule_spec.rb b/spec/lib/open_food_network/reports/rule_spec.rb
index 0e7a1d979b..99953f8391 100644
--- a/spec/lib/open_food_network/reports/rule_spec.rb
+++ b/spec/lib/open_food_network/reports/rule_spec.rb
@@ -6,17 +6,17 @@ module OpenFoodNetwork::Reports
     let(:proc) { Proc.new {} }
 
     it "can define a group proc and return it in a hash" do
-      rule.group &proc
+      rule.group(&proc)
       rule.to_h.should == {group_by: proc, sort_by: nil}
     end
 
     it "can define a sort proc and return it in a hash" do
-      rule.sort &proc
+      rule.sort(&proc)
       rule.to_h.should == {group_by: nil,  sort_by: proc}
     end
 
     it "can define a nested rule" do
-      rule.organise &proc
+      rule.organise(&proc)
       rule.next.should be_a Rule
     end
 
diff --git a/spec/models/tag_rule/discount_order_spec.rb b/spec/models/tag_rule/discount_order_spec.rb
index 93723ad84a..07264cca8f 100644
--- a/spec/models/tag_rule/discount_order_spec.rb
+++ b/spec/models/tag_rule/discount_order_spec.rb
@@ -65,9 +65,9 @@ describe TagRule::DiscountOrder, type: :model do
       it "creates a new adjustment on the order" do
         tag_rule.send(:apply!)
         expect(adjustment).to be_a Spree::Adjustment
-        expect(adjustment.amount).to eq -10.00
+        expect(adjustment.amount).to eq(-10.00)
         expect(adjustment.label).to eq "Discount"
-        expect(order.adjustment_total).to eq -10.00
+        expect(order.adjustment_total).to eq(-10.00)
         expect(order.total).to eq 90.00
       end
     end
@@ -83,7 +83,7 @@ describe TagRule::DiscountOrder, type: :model do
       it "the adjustment is made on line item total, ie. ignores the shipping amount" do
         tag_rule.send(:apply!)
         expect(adjustment).to be_a Spree::Adjustment
-        expect(adjustment.amount).to eq -10.00
+        expect(adjustment.amount).to eq(-10.00)
         expect(adjustment.label).to eq "Discount"
         expect(order.adjustment_total).to eq 15.00
         expect(order.total).to eq 115.00