diff --git a/.circleci/config.yml b/.circleci/config.yml
index b58334d..095e7cc 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -20,7 +20,7 @@ commands:
             sudo apt-get update
             sudo apt-get install -yq libvips-dev
       - solidusio_extensions/test-branch:
-          branch: master
+          branch: main
           command: |
             export FRONTEND=starter
             sudo gem update --system
@@ -33,26 +33,28 @@ jobs:
   run-specs-with-postgres:
     executor:
       name: solidusio_extensions/postgres
-      ruby_version: '3.1'
+      ruby_version: '3.2'
     steps:
       - test-with-starter-frontend
 
   run-specs-with-mysql:
     executor:
       name: solidusio_extensions/mysql
-      ruby_version: '3.0'
+      ruby_version: '3.1'
     steps:
       - test-with-starter-frontend
 
   run-specs-with-sqlite:
     executor:
       name: solidusio_extensions/sqlite
-      ruby_version: '2.7'
+      ruby_version: '3.0'
     steps:
       - test-with-starter-frontend
 
   lint-code:
-    executor: solidusio_extensions/sqlite-memory
+    executor:
+      name: solidusio_extensions/sqlite-memory
+      ruby_version: '3.0'
     steps:
       - solidusio_extensions/lint-code
 
@@ -64,14 +66,14 @@ workflows:
       - run-specs-with-sqlite
       - lint-code
 
-  "Weekly run specs against master":
+  "Weekly run specs against main":
     triggers:
       - schedule:
           cron: "0 0 * * 4" # every Thursday
           filters:
             branches:
               only:
-                - master
+                - main
     jobs:
       - run-specs-with-postgres
       - run-specs-with-mysql
diff --git a/.rubocop.yml b/.rubocop.yml
index 1910451..aed1e4d 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -3,7 +3,7 @@ require:
 
 AllCops:
   NewCops: disable
-  TargetRubyVersion: '2.7'
+  TargetRubyVersion: '3.0'
   Exclude:
     - sandbox/**/*
     - dummy-app/**/*
diff --git a/app/models/solidus_paypal_commerce_platform/paypal_order.rb b/app/models/solidus_paypal_commerce_platform/paypal_order.rb
index 463b52a..58c51d1 100644
--- a/app/models/solidus_paypal_commerce_platform/paypal_order.rb
+++ b/app/models/solidus_paypal_commerce_platform/paypal_order.rb
@@ -92,7 +92,7 @@ def breakdown
         item_total: price(@order.item_total),
         shipping: price(@order.shipment_total),
         tax_total: price(@order.additional_tax_total),
-        discount: price(@order.all_adjustments.promotion.sum(&:amount).abs)
+        discount: price(@order.promo_total.abs)
       }
     end
 
diff --git a/bin/dummy-app b/bin/dummy-app
index e6c085c..5acbc30 100755
--- a/bin/dummy-app
+++ b/bin/dummy-app
@@ -28,7 +28,7 @@ if [ ! -d "dummy-app" ]; then
 fi
 
 cd ./dummy-app
-unbundled bundle add solidus --github solidusio/solidus --branch "${BRANCH:-master}" --version '> 0.a'
+unbundled bundle add solidus --github solidusio/solidus --branch "${BRANCH:-main}" --version '> 0.a'
 unbundled bundle exec rake db:drop db:create
 unbundled bundle exec rails generate solidus:install --auto-accept --payment-method=none --no-seed --no-sample "$@"
 unbundled bundle add $extension_name --path ..
diff --git a/bin/sandbox b/bin/sandbox
index bd96ffe..3d95d5a 100755
--- a/bin/sandbox
+++ b/bin/sandbox
@@ -22,7 +22,7 @@ if [ ! -z $SOLIDUS_BRANCH ]
 then
   BRANCH=$SOLIDUS_BRANCH
 else
-  BRANCH="master"
+  BRANCH="main"
 fi
 
 extension_name="solidus_paypal_commerce_platform"
@@ -47,7 +47,7 @@ if [ ! -d "sandbox" ]; then
 fi
 
 cd ./sandbox
-unbundled bundle add solidus --github solidusio/solidus --branch "${BRANCH:-master}" --version '> 0.a'
+unbundled bundle add solidus --github solidusio/solidus --branch "${BRANCH:-main}" --version '> 0.a'
 unbundled bundle exec rake db:drop db:create
 unbundled bundle exec rails generate solidus:install --payment-method=none --auto-accept "$@"
 unbundled bundle add ${extension_name} --path '../'
diff --git a/solidus_paypal_commerce_platform.gemspec b/solidus_paypal_commerce_platform.gemspec
index 05acb24..36cc75f 100644
--- a/solidus_paypal_commerce_platform.gemspec
+++ b/solidus_paypal_commerce_platform.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
   spec.metadata['changelog_uri'] = 'https://github.com/solidusio/solidus_paypal_commerce_platform/releases'
   spec.metadata['rubygems_mfa_required'] = 'true'
 
-  spec.required_ruby_version = Gem::Requirement.new('>= 2.7')
+  spec.required_ruby_version = Gem::Requirement.new('>= 3.0')
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
diff --git a/spec/models/solidus_paypal_commerce_platform/paypal_order_spec.rb b/spec/models/solidus_paypal_commerce_platform/paypal_order_spec.rb
index d4bdb3a..3e2a7e1 100644
--- a/spec/models/solidus_paypal_commerce_platform/paypal_order_spec.rb
+++ b/spec/models/solidus_paypal_commerce_platform/paypal_order_spec.rb
@@ -70,6 +70,44 @@
         )
       end
     end
+
+    context 'when an order has an inapplicable promo adjustment' do
+      let(:best_promotion) {
+        create(:promotion,
+          :with_line_item_adjustment,
+          :with_item_total_rule, adjustment_rate: 2.5, item_total_threshold_amount: 10,
+          apply_automatically: true,
+          promotion_actions: [
+            Spree::Promotion::Actions::CreateItemAdjustments.new(
+              calculator: Spree::Calculator::FlatPercentItemTotal.new(preferred_flat_percent: 10)
+            )
+          ])
+      }
+
+      let(:worst_promotion) {
+        create(:promotion,
+          :with_line_item_adjustment,
+          :with_item_total_rule, adjustment_rate: 2.5, item_total_threshold_amount: 10,
+          apply_automatically: true,
+          promotion_actions: [
+            Spree::Promotion::Actions::CreateItemAdjustments.new(
+              calculator: Spree::Calculator::FlatPercentItemTotal.new(preferred_flat_percent: 5)
+            )
+          ])
+      }
+
+      before do
+        best_promotion.activate(order: order)
+        worst_promotion.activate(order: order)
+        order.recalculate
+      end
+
+      it 'does not include it in the paypal order breakdown' do
+        expect(to_json.dig(:purchase_units, 0).dig(:amount, :breakdown)).to match hash_including(
+          discount: { currency_code: "USD", value: "2.50" }
+        )
+      end
+    end
   end
 
   private