diff --git a/asset/.coveragerc b/asset/.coveragerc
index 6b9ab9da4a1b..b178b094aa1d 100644
--- a/asset/.coveragerc
+++ b/asset/.coveragerc
@@ -1,3 +1,4 @@
+# Generated by synthtool. DO NOT EDIT!
 [run]
 branch = True
 
diff --git a/asset/.flake8 b/asset/.flake8
index 61766fa84d02..0268ecc9c55c 100644
--- a/asset/.flake8
+++ b/asset/.flake8
@@ -1,3 +1,4 @@
+# Generated by synthtool. DO NOT EDIT!
 [flake8]
 ignore = E203, E266, E501, W503
 exclude =
diff --git a/asset/noxfile.py b/asset/noxfile.py
index 19ec0c81e3c6..7e3123d42473 100644
--- a/asset/noxfile.py
+++ b/asset/noxfile.py
@@ -14,6 +14,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Generated by synthtool. DO NOT EDIT!
+
 from __future__ import absolute_import
 import os
 import shutil
diff --git a/asset/setup.cfg b/asset/setup.cfg
index 2a9acf13daa9..3bd555500e37 100644
--- a/asset/setup.cfg
+++ b/asset/setup.cfg
@@ -1,2 +1,3 @@
+# Generated by synthtool. DO NOT EDIT!
 [bdist_wheel]
 universal = 1
diff --git a/asset/synth.metadata b/asset/synth.metadata
index f1722c1d1f26..0550c29d9d07 100644
--- a/asset/synth.metadata
+++ b/asset/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-06-06T12:11:11.926126Z",
+  "updateTime": "2019-06-14T12:11:04.971125Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.23.1",
-        "dockerImage": "googleapis/artman@sha256:9d5cae1454da64ac3a87028f8ef486b04889e351c83bb95e83b8fab3959faed0"
+        "version": "0.25.0",
+        "dockerImage": "googleapis/artman@sha256:ef1a98ab1e2b8f05f4d9a56f27d63347aefe14020e5f2d585172b14ca76f1d90"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "f03bf2139ee85aac88411d6c20a21f4c901fe83c",
-        "internalRef": "251806891"
+        "sha": "c23b68eecb00c4d285a730a49b1d7d943cd56183",
+        "internalRef": "253113405"
       }
     },
     {