diff --git a/texttospeech/google/cloud/texttospeech_v1/types.py b/texttospeech/google/cloud/texttospeech_v1/types.py
index 3deb362e848b..a231d28c1b6d 100644
--- a/texttospeech/google/cloud/texttospeech_v1/types.py
+++ b/texttospeech/google/cloud/texttospeech_v1/types.py
@@ -19,11 +19,9 @@
 
 from google.api_core.protobuf_helpers import get_messages
 
-from google.api import http_pb2
 from google.cloud.texttospeech_v1.proto import cloud_tts_pb2
-from google.protobuf import descriptor_pb2
 
-_shared_modules = [http_pb2, descriptor_pb2]
+_shared_modules = []
 
 _local_modules = [cloud_tts_pb2]
 
diff --git a/texttospeech/google/cloud/texttospeech_v1beta1/types.py b/texttospeech/google/cloud/texttospeech_v1beta1/types.py
index 1fc840a1c458..6d4388a7cce6 100644
--- a/texttospeech/google/cloud/texttospeech_v1beta1/types.py
+++ b/texttospeech/google/cloud/texttospeech_v1beta1/types.py
@@ -19,11 +19,9 @@
 
 from google.api_core.protobuf_helpers import get_messages
 
-from google.api import http_pb2
 from google.cloud.texttospeech_v1beta1.proto import cloud_tts_pb2
-from google.protobuf import descriptor_pb2
 
-_shared_modules = [http_pb2, descriptor_pb2]
+_shared_modules = []
 
 _local_modules = [cloud_tts_pb2]
 
diff --git a/texttospeech/synth.metadata b/texttospeech/synth.metadata
index c12c262a4b00..ce2872a40ecd 100644
--- a/texttospeech/synth.metadata
+++ b/texttospeech/synth.metadata
@@ -1,11 +1,11 @@
 {
-  "updateTime": "2019-02-01T19:05:35.269409Z",
+  "updateTime": "2019-02-02T13:31:17.308137Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.16.7",
-        "dockerImage": "googleapis/artman@sha256:d6c8ced606eb49973ca95d2af7c55a681acc042db0f87d135968349e7bf6dd80"
+        "version": "0.16.8",
+        "dockerImage": "googleapis/artman@sha256:75bc07ef34a1de9895c18af54dc503ed3b3f3b52e85062e3360a979d2a0741e7"
       }
     },
     {