diff --git a/lib/intelligent_foods/api_client.rb b/lib/intelligent_foods/api_client.rb
index 5b8e625..f3841f0 100644
--- a/lib/intelligent_foods/api_client.rb
+++ b/lib/intelligent_foods/api_client.rb
@@ -24,6 +24,25 @@ def authenticate!
       self
     end
 
+    def build_patch_request(uri:, body: nil)
+      build_request_with_body(uri: uri, body: body,
+                              http_method: Net::HTTP::Patch)
+    end
+
+    def build_post_request(uri:, body: nil)
+      build_request_with_body(uri: uri, body: body,
+                              http_method: Net::HTTP::Post)
+    end
+
+    def build_request_with_body(uri:, body:, http_method:)
+      request = http_method.new(uri)
+      request["content-type"] = "application/json"
+      unless body.nil?
+        request.body = body.to_json
+      end
+      request
+    end
+
     def execute_request(request:, uri:, body: nil,
                         authorization: default_authorization)
       Net::HTTP.start(uri.host, uri.port, use_ssl: true) do |http|
@@ -34,13 +53,6 @@ def execute_request(request:, uri:, body: nil,
       end
     end
 
-    def build_request_with_body(uri:, body:)
-      request = Net::HTTP::Post.new(uri)
-      request.body = body.to_json
-      request["content-type"] = "application/json"
-      request
-    end
-
     def authenticated?
       access_token.present?
     end
diff --git a/lib/intelligent_foods/errors.rb b/lib/intelligent_foods/errors.rb
index 7648540..8511dcb 100644
--- a/lib/intelligent_foods/errors.rb
+++ b/lib/intelligent_foods/errors.rb
@@ -8,4 +8,6 @@ class OrderNotCancelledError < ApiError; end
   class OrderNotCreatedError < ApiError; end
 
   class AuthenticationError < ApiError; end
+
+  class OrderNotUpdatedError < ApiError; end
 end
diff --git a/lib/intelligent_foods/resources/order.rb b/lib/intelligent_foods/resources/order.rb
index f3ff679..24fd8a1 100644
--- a/lib/intelligent_foods/resources/order.rb
+++ b/lib/intelligent_foods/resources/order.rb
@@ -22,7 +22,7 @@ def self.build_from_response(data)
 
     def create!
       uri = URI("#{IntelligentFoods.base_url}/order")
-      request = client.build_request_with_body(uri: uri, body: request_body)
+      request = client.build_post_request(uri: uri, body: request_body)
       response = client.execute_request(request: request, uri: uri)
       if response.success?
         Order::build_from_response(response.data)
@@ -45,6 +45,18 @@ def cancel!
       end
     end
 
+    def update!
+      uri = URI("#{IntelligentFoods.base_url}/order/#{id}")
+      request = client.build_patch_request(uri: uri, body: update_request_body)
+      response = client.execute_request(request: request, uri: uri)
+      if response.success?
+        Order::build_from_response(response.data)
+      else
+        mark_as_invalid
+        raise OrderNotUpdatedError.build(response)
+      end
+    end
+
     def request_body
       @request_body ||= {
         menu_id: menu.id,
@@ -55,6 +67,12 @@ def request_body
       }
     end
 
+    def update_request_body
+      {
+        ship_to: ship_to,
+      }
+    end
+
     def cancelled?
       status.downcase == CANCELLED
     end
diff --git a/spec/factories.rb b/spec/factories.rb
index 7cfeae7..2b6cd0d 100644
--- a/spec/factories.rb
+++ b/spec/factories.rb
@@ -1,4 +1,15 @@
 FactoryBot.define do
+  factory :order, class: "IntelligentFoods::Order" do
+    menu
+    recipient
+    delivery_date { Date.today.to_s }
+    items { [build(:order_item)] }
+    sequence :external_id do |n|
+      "d89397e1bad49c3b855df4406e5bf0#{n}"
+    end
+    callback_url { "http://test.com/api/callback" }
+  end
+
   factory :recipient, class: "IntelligentFoods::Recipient" do
     name { "First Name" }
     street1 { "123 Main Street" }
diff --git a/spec/intelligent_foods/api_client_spec.rb b/spec/intelligent_foods/api_client_spec.rb
index 6bf86aa..ff88fda 100644
--- a/spec/intelligent_foods/api_client_spec.rb
+++ b/spec/intelligent_foods/api_client_spec.rb
@@ -165,6 +165,26 @@
       end
     end
 
+    describe "#build_patch_request" do
+      it "builds a request using the Patch HTTP method" do
+        client = IntelligentFoods::ApiClient.new(id: "id", secret: "secret")
+
+        result = client.build_patch_request(uri: "test.com", body: {})
+
+        expect(result.method).to eq("PATCH")
+      end
+    end
+
+    describe "#build_post_request" do
+      it "builds a request using the Post HTTP method" do
+        client = IntelligentFoods::ApiClient.new(id: "id", secret: "secret")
+
+        result = client.build_post_request(uri: "test.com", body: {})
+
+        expect(result.method).to eq("POST")
+      end
+    end
+
     describe "#authenticated?" do
       it "is not authenticated" do
         client = IntelligentFoods::ApiClient.new(id: "id", secret: "secret")
diff --git a/spec/intelligent_foods/resources/order_spec.rb b/spec/intelligent_foods/resources/order_spec.rb
index 64d4e50..603411a 100644
--- a/spec/intelligent_foods/resources/order_spec.rb
+++ b/spec/intelligent_foods/resources/order_spec.rb
@@ -142,4 +142,45 @@
       end
     end
   end
+
+  describe "#update!" do
+    it "updates the order" do
+      order = build(:order)
+      body = build_order_response
+      response = build_response(body: body)
+      stub_api_response response: response
+
+      result = order.update!
+
+      expect(result).to be_accepted
+    end
+
+    context "the response code is not 200" do
+      it "raises a OrderNotUpdatedError" do
+        order = build(:order)
+        response = error_response(message: "Order Not Found",
+                                  http_status_code: 404)
+        stub_api_response response: response
+
+        expect {
+          order.update!
+        }.to raise_error(IntelligentFoods::OrderNotUpdatedError)
+      end
+
+      it "marks the order as not valid" do
+        order = build(:order)
+        response = error_response(message: "Order Not Found",
+                                  http_status_code: 404)
+        stub_api_response response: response
+
+        begin
+          order.update!
+        rescue IntelligentFoods::OrderNotUpdatedError
+          # noop
+        end
+
+        expect(order).not_to be_valid
+      end
+    end
+  end
 end