diff --git a/releasenotes/notes/add-update-encryption-type-to-encryption-types-client-f3093532a0bcf9a1.yaml b/releasenotes/notes/add-update-encryption-type-to-encryption-types-client-f3093532a0bcf9a1.yaml
new file mode 100644
index 0000000..c95e77c
--- /dev/null
+++ b/releasenotes/notes/add-update-encryption-type-to-encryption-types-client-f3093532a0bcf9a1.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Add update encryption type API to the v2 encryption_types_client library.
+    This feature enables the possibility to update an encryption type for an
+    existing volume type.
diff --git a/tempest/api/volume/admin/test_volume_types.py b/tempest/api/volume/admin/test_volume_types.py
index f75c940..19cb476 100644
--- a/tempest/api/volume/admin/test_volume_types.py
+++ b/tempest/api/volume/admin/test_volume_types.py
@@ -123,43 +123,55 @@
             fetched_volume_type['os-volume-type-access:is_public'])
 
     @decorators.idempotent_id('7830abd0-ff99-4793-a265-405684a54d46')
-    def test_volume_type_encryption_create_get_delete(self):
-        # Create/get/delete encryption type.
-        provider = "LuksEncryptor"
-        control_location = "front-end"
-        body = self.create_volume_type()
+    def test_volume_type_encryption_create_get_update_delete(self):
+        # Create/get/update/delete encryption type.
+        create_kwargs = {'provider': 'LuksEncryptor',
+                         'control_location': 'front-end'}
+        volume_type_id = self.create_volume_type()['id']
+
         # Create encryption type
         encryption_type = \
             self.admin_encryption_types_client.create_encryption_type(
-                body['id'], provider=provider,
-                control_location=control_location)['encryption']
+                volume_type_id, **create_kwargs)['encryption']
         self.assertIn('volume_type_id', encryption_type)
-        self.assertEqual(provider, encryption_type['provider'],
-                         "The created encryption_type provider is not equal "
-                         "to the requested provider")
-        self.assertEqual(control_location, encryption_type['control_location'],
-                         "The created encryption_type control_location is not "
-                         "equal to the requested control_location")
+        for key in create_kwargs:
+            self.assertEqual(create_kwargs[key], encryption_type[key],
+                             'The created encryption_type %s is different '
+                             'from the requested encryption_type' % key)
 
         # Get encryption type
+        encrypt_type_id = encryption_type['volume_type_id']
         fetched_encryption_type = (
             self.admin_encryption_types_client.show_encryption_type(
-                encryption_type['volume_type_id']))
-        self.assertEqual(provider,
-                         fetched_encryption_type['provider'],
-                         'The fetched encryption_type provider is different '
-                         'from the created encryption_type')
-        self.assertEqual(control_location,
-                         fetched_encryption_type['control_location'],
-                         'The fetched encryption_type control_location is '
-                         'different from the created encryption_type')
+                encrypt_type_id))
+        for key in create_kwargs:
+            self.assertEqual(create_kwargs[key], fetched_encryption_type[key],
+                             'The fetched encryption_type %s is different '
+                             'from the created encryption_type' % key)
+
+        # Update encryption type
+        update_kwargs = {'key_size': 128,
+                         'provider': 'SomeProvider',
+                         'cipher': 'aes-xts-plain64',
+                         'control_location': 'back-end'}
+        self.admin_encryption_types_client.update_encryption_type(
+            encrypt_type_id, **update_kwargs)
+        updated_encryption_type = (
+            self.admin_encryption_types_client.show_encryption_type(
+                encrypt_type_id))
+        for key in update_kwargs:
+            self.assertEqual(update_kwargs[key], updated_encryption_type[key],
+                             'The fetched encryption_type %s is different '
+                             'from the updated encryption_type' % key)
 
         # Delete encryption type
-        type_id = encryption_type['volume_type_id']
-        self.admin_encryption_types_client.delete_encryption_type(type_id)
-        self.admin_encryption_types_client.wait_for_resource_deletion(type_id)
+        self.admin_encryption_types_client.delete_encryption_type(
+            encrypt_type_id)
+        self.admin_encryption_types_client.wait_for_resource_deletion(
+            encrypt_type_id)
         deleted_encryption_type = (
-            self.admin_encryption_types_client.show_encryption_type(type_id))
+            self.admin_encryption_types_client.show_encryption_type(
+                encrypt_type_id))
         self.assertEmpty(deleted_encryption_type)
 
     @decorators.idempotent_id('cf9f07c6-db9e-4462-a243-5933ad65e9c8')
diff --git a/tempest/lib/services/volume/v2/encryption_types_client.py b/tempest/lib/services/volume/v2/encryption_types_client.py
index 8b01f11..eeff537 100755
--- a/tempest/lib/services/volume/v2/encryption_types_client.py
+++ b/tempest/lib/services/volume/v2/encryption_types_client.py
@@ -67,3 +67,17 @@
             "/types/%s/encryption/provider" % volume_type_id)
         self.expected_success(202, resp.status)
         return rest_client.ResponseBody(resp, body)
+
+    def update_encryption_type(self, volume_type_id, **kwargs):
+        """Update an encryption type for an existing volume type.
+
+        TODO: Current api-site doesn't contain this API description.
+        After fixing the api-site, we need to fix here also for putting
+        the link to api-site.
+        """
+        url = "/types/%s/encryption/provider" % volume_type_id
+        put_body = json.dumps({'encryption': kwargs})
+        resp, body = self.put(url, put_body)
+        body = json.loads(body)
+        self.expected_success(200, resp.status)
+        return rest_client.ResponseBody(resp, body)