diff --git a/app/models/spree/shipping_method.rb b/app/models/spree/shipping_method.rb
index d3ed72edc3..fd7b1e4415 100644
--- a/app/models/spree/shipping_method.rb
+++ b/app/models/spree/shipping_method.rb
@@ -5,6 +5,7 @@ module Spree
     include Spree::Core::CalculatedAdjustments
     DISPLAY = [:both, :front_end, :back_end].freeze
 
+    acts_as_paranoid
     acts_as_taggable
 
     default_scope -> { where(deleted_at: nil) }
diff --git a/spec/models/spree/shipping_method_spec.rb b/spec/models/spree/shipping_method_spec.rb
index b69e4f5fb4..35ecfa6d83 100644
--- a/spec/models/spree/shipping_method_spec.rb
+++ b/spec/models/spree/shipping_method_spec.rb
@@ -159,6 +159,16 @@ module Spree
       end
     end
 
+    # Regression test for Spree #4320
+    context "soft deletion" do
+      let(:shipping_method) { create(:shipping_method) }
+
+      it "soft-deletes when destroy is called" do
+        shipping_method.destroy
+        expect(shipping_method.deleted_at).to_not be_blank
+      end
+    end
+
     context 'factory' do
       let(:shipping_method){ create :shipping_method }