diff --git a/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2.py b/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2.py
index 755af3c54882..bce18741da55 100644
--- a/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2.py
+++ b/spanner/google/cloud/spanner_admin_database_v1/proto/spanner_database_admin_pb2.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: google/cloud/spanner/admin/database_v1/proto/spanner_database_admin.proto
 
diff --git a/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2.py b/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2.py
index 035f656bd153..2e16c4a16681 100644
--- a/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2.py
+++ b/spanner/google/cloud/spanner_admin_instance_v1/proto/spanner_instance_admin_pb2.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: google/cloud/spanner/admin/instance_v1/proto/spanner_instance_admin.proto
 
diff --git a/spanner/google/cloud/spanner_v1/proto/keys_pb2.py b/spanner/google/cloud/spanner_v1/proto/keys_pb2.py
index f2665fb0bcff..3d381357b88c 100644
--- a/spanner/google/cloud/spanner_v1/proto/keys_pb2.py
+++ b/spanner/google/cloud/spanner_v1/proto/keys_pb2.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: google/cloud/spanner_v1/proto/keys.proto
 
diff --git a/spanner/google/cloud/spanner_v1/proto/mutation_pb2.py b/spanner/google/cloud/spanner_v1/proto/mutation_pb2.py
index 8545efd1d0e3..6002879385af 100644
--- a/spanner/google/cloud/spanner_v1/proto/mutation_pb2.py
+++ b/spanner/google/cloud/spanner_v1/proto/mutation_pb2.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: google/cloud/spanner_v1/proto/mutation.proto
 
diff --git a/spanner/google/cloud/spanner_v1/proto/query_plan_pb2.py b/spanner/google/cloud/spanner_v1/proto/query_plan_pb2.py
index 4f2e6b9cc6a3..37718bdad555 100644
--- a/spanner/google/cloud/spanner_v1/proto/query_plan_pb2.py
+++ b/spanner/google/cloud/spanner_v1/proto/query_plan_pb2.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: google/cloud/spanner_v1/proto/query_plan.proto
 
diff --git a/spanner/google/cloud/spanner_v1/proto/result_set_pb2.py b/spanner/google/cloud/spanner_v1/proto/result_set_pb2.py
index 225cd9c85c68..2639bd03417e 100644
--- a/spanner/google/cloud/spanner_v1/proto/result_set_pb2.py
+++ b/spanner/google/cloud/spanner_v1/proto/result_set_pb2.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: google/cloud/spanner_v1/proto/result_set.proto
 
diff --git a/spanner/google/cloud/spanner_v1/proto/spanner_pb2.py b/spanner/google/cloud/spanner_v1/proto/spanner_pb2.py
index e2e3b84020bb..79b6464cdcf2 100644
--- a/spanner/google/cloud/spanner_v1/proto/spanner_pb2.py
+++ b/spanner/google/cloud/spanner_v1/proto/spanner_pb2.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: google/cloud/spanner_v1/proto/spanner.proto
 
diff --git a/spanner/google/cloud/spanner_v1/proto/transaction_pb2.py b/spanner/google/cloud/spanner_v1/proto/transaction_pb2.py
index b054c2dfb644..db95c96805ad 100644
--- a/spanner/google/cloud/spanner_v1/proto/transaction_pb2.py
+++ b/spanner/google/cloud/spanner_v1/proto/transaction_pb2.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: google/cloud/spanner_v1/proto/transaction.proto
 
diff --git a/spanner/google/cloud/spanner_v1/proto/type_pb2.py b/spanner/google/cloud/spanner_v1/proto/type_pb2.py
index 34565b94e033..3e8ba25685e9 100644
--- a/spanner/google/cloud/spanner_v1/proto/type_pb2.py
+++ b/spanner/google/cloud/spanner_v1/proto/type_pb2.py
@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: google/cloud/spanner_v1/proto/type.proto
 
diff --git a/spanner/synth.metadata b/spanner/synth.metadata
index b9a06039c9da..9d9f48e172b3 100644
--- a/spanner/synth.metadata
+++ b/spanner/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-06-14T12:30:09.433876Z",
+  "updateTime": "2019-06-15T12:28:33.202137Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.25.0",
-        "dockerImage": "googleapis/artman@sha256:ef1a98ab1e2b8f05f4d9a56f27d63347aefe14020e5f2d585172b14ca76f1d90"
+        "version": "0.26.0",
+        "dockerImage": "googleapis/artman@sha256:6db0735b0d3beec5b887153a2a7c7411fc7bb53f73f6f389a822096bd14a3a15"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "c23b68eecb00c4d285a730a49b1d7d943cd56183",
-        "internalRef": "253113405"
+        "sha": "7b58b37559f6a5337c4c564518e9573d742df225",
+        "internalRef": "253322136"
       }
     },
     {