diff --git a/addons/api/addon/generated/models/auth-method.js b/addons/api/addon/generated/models/auth-method.js
index 995e65efd..7dd5805c0 100644
--- a/addons/api/addon/generated/models/auth-method.js
+++ b/addons/api/addon/generated/models/auth-method.js
@@ -39,4 +39,9 @@ export default class GeneratedAuthMethodModel extends BaseModel {
   })
   disabled;
 
+  @attr('number', {
+    description: 'Current version number of this resource.',
+  })
+  version;
+
 }
diff --git a/addons/api/addon/generated/models/group.js b/addons/api/addon/generated/models/group.js
index bce0d1076..e8c442e1b 100644
--- a/addons/api/addon/generated/models/group.js
+++ b/addons/api/addon/generated/models/group.js
@@ -33,4 +33,10 @@ export default class GeneratedGroupModel extends BaseModel {
     description: 'Whether the resource is disabled',
   })
   disabled;
+
+  @attr('number', {
+    description: 'Current version number of this resource.',
+  })
+  version;
+  
 }
diff --git a/addons/api/addon/generated/models/host-catalog.js b/addons/api/addon/generated/models/host-catalog.js
index 4a8166e3c..7207048c2 100644
--- a/addons/api/addon/generated/models/host-catalog.js
+++ b/addons/api/addon/generated/models/host-catalog.js
@@ -38,4 +38,9 @@ export default class GeneratedHostCatalogModel extends BaseModel {
     description: 'Attributes specific to the catalog type'
   }) attributes;
 
+  @attr('number', {
+    description: 'Current version number of this resource.',
+  })
+  version;
+
 }
diff --git a/addons/api/addon/generated/models/scope.js b/addons/api/addon/generated/models/scope.js
index a7448b034..3c3731b3d 100644
--- a/addons/api/addon/generated/models/scope.js
+++ b/addons/api/addon/generated/models/scope.js
@@ -34,4 +34,9 @@ export default class GeneratedScopeModel extends BaseModel {
   })
   updated_time;
 
+  @attr('number', {
+    description: 'Current version number of this resource.',
+  })
+  version;
+
 }
diff --git a/addons/api/addon/generated/models/user.js b/addons/api/addon/generated/models/user.js
index 98fff7c32..433faeceb 100644
--- a/addons/api/addon/generated/models/user.js
+++ b/addons/api/addon/generated/models/user.js
@@ -33,4 +33,9 @@ export default class GeneratedUserModel extends BaseModel {
     description: 'Whether the resource is disabled',
   })
   disabled;
+
+  @attr('number', {
+    description: 'Current version number of this resource.',
+  })
+  version;
 }
diff --git a/addons/api/addon/serializers/application.js b/addons/api/addon/serializers/application.js
index c839eb78c..bfe422161 100644
--- a/addons/api/addon/serializers/application.js
+++ b/addons/api/addon/serializers/application.js
@@ -40,6 +40,10 @@ export default class ApplicationSerializer extends RESTSerializer {
     let value = super.serializeAttribute(...arguments);
     // Do not serialize read-only attributes.
     if (options.readOnly) delete json[key];
+    // Version is sent only if it has a non-nullish value
+    if (key === 'version') {
+      if (json[key] === null || json[key] === undefined) delete json[key];
+    }
     // Do not serialize `disabled` fields.
     // TODO:  disabled is temporarily disabled
     if (key === 'disabled') delete json[key];
diff --git a/addons/api/tests/unit/serializers/application-test.js b/addons/api/tests/unit/serializers/application-test.js
index 4769cfa3f..c067939b9 100644
--- a/addons/api/tests/unit/serializers/application-test.js
+++ b/addons/api/tests/unit/serializers/application-test.js
@@ -29,6 +29,28 @@ module('Unit | Serializer | application', function (hooks) {
     });
   });
 
+  test('it serializes non-nullish version fields', function (assert) {
+    assert.expect(2);
+    const store = this.owner.lookup('service:store');
+    const record = store.createRecord('user', {
+      name: 'User',
+      description: 'Description',
+      version: null
+    });
+    let serializedRecord = record.serialize();
+    assert.deepEqual(serializedRecord, {
+      name: 'User',
+      description: 'Description'
+    });
+    record.version = 1;
+    serializedRecord = record.serialize();
+    assert.deepEqual(serializedRecord, {
+      name: 'User',
+      description: 'Description',
+      version: 1
+    });
+  });
+
   test('it normalizes array records from an `items` root key', function (assert) {
     assert.expect(1);
     const store = this.owner.lookup('service:store');