diff --git a/src/main/java/io/grafeas/v1/stub/GrafeasStubSettings.java b/src/main/java/io/grafeas/v1/stub/GrafeasStubSettings.java
index 85b7d2ea..3ee8e8e8 100644
--- a/src/main/java/io/grafeas/v1/stub/GrafeasStubSettings.java
+++ b/src/main/java/io/grafeas/v1/stub/GrafeasStubSettings.java
@@ -412,7 +412,9 @@ public static List<String> getDefaultServiceScopes() {
 
   /** Returns a builder for the default credentials for this service. */
   public static GoogleCredentialsProvider.Builder defaultCredentialsProviderBuilder() {
-    return GoogleCredentialsProvider.newBuilder().setScopesToApply(DEFAULT_SERVICE_SCOPES);
+    return GoogleCredentialsProvider.newBuilder()
+        .setScopesToApply(DEFAULT_SERVICE_SCOPES)
+        .setUseJwtAccessWithScope(true);
   }
 
   /** Returns a builder for the default ChannelProvider for this service. */
diff --git a/synth.metadata b/synth.metadata
index 6dc0e06f..f95e89fa 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -11,8 +11,8 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "d9eaf41de44d953458b18712a3f240bb4c564e48",
-        "internalRef": "388535346"
+        "sha": "e1738ee972b49fd0c4d4718b035444495142b781",
+        "internalRef": "391407209"
       }
     },
     {