diff --git a/README.md b/README.md
index 701a797..f3e7915 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ To use the Cloud Ops API in your project, preform the following 4 steps:
 
 The client is expected to pass in a `temporal-cloud-api-version` header with the api version identifier with every request it makes to the apis. The backend will use the version to safely mutate resources. The `temporal:versioning:min_version` label specifies the minimum version of the API that supports the field.
 
-Current Version `v0.15.0`
+Current Version `v0.16.0`
 
 ### URL
 
diff --git a/VERSION b/VERSION
index 86dd09a..cfe6c00 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-v0.15.0
+v0.16.0
diff --git a/temporal/api/cloud/billing/v1/message.proto b/temporal/api/cloud/billing/v1/message.proto
index 3d18888..a792f81 100644
--- a/temporal/api/cloud/billing/v1/message.proto
+++ b/temporal/api/cloud/billing/v1/message.proto
@@ -23,6 +23,17 @@ message BillingReportSpec {
   // The description for the billing report.
   // Optional, default is empty.
   string description = 4;
+  // The data granularity of the billing report.
+  // Optional, default is hourly.
+  // temporal:versioning:min_version=v0.16.0
+  BillingReportGranularity granularity = 5;
+
+  enum BillingReportGranularity {
+    BILLING_REPORT_GRANULARITY_UNSPECIFIED = 0;
+    BILLING_REPORT_GRANULARITY_HOURLY = 1;
+    BILLING_REPORT_GRANULARITY_DAILY = 2;
+    BILLING_REPORT_GRANULARITY_MONTHLY = 3;
+  }
 }
 
 message BillingReport {