diff --git a/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/TimeInterval.java b/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/TimeInterval.java
index adcd2392..dab90aaf 100644
--- a/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/TimeInterval.java
+++ b/proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/TimeInterval.java
@@ -32,7 +32,7 @@
  * * For `DELTA` and `CUMULATIVE` metrics, the start time must be earlier
  *   than the end time.
  * * In all cases, the start time of the next interval must be
- *   at least a microsecond after the end time of the previous interval.
+ *   at least a millisecond after the end time of the previous interval.
  *   Because the interval is closed, if the start time of a new interval
  *   is the same as the end time of the previous interval, data written
  *   at the new start time could overwrite data written at the previous
@@ -428,7 +428,7 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    * * For `DELTA` and `CUMULATIVE` metrics, the start time must be earlier
    *   than the end time.
    * * In all cases, the start time of the next interval must be
-   *   at least a microsecond after the end time of the previous interval.
+   *   at least a millisecond after the end time of the previous interval.
    *   Because the interval is closed, if the start time of a new interval
    *   is the same as the end time of the previous interval, data written
    *   at the new start time could overwrite data written at the previous
diff --git a/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/common.proto b/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/common.proto
index 638ef4a6..f1b38c23 100644
--- a/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/common.proto
+++ b/proto-google-cloud-monitoring-v3/src/main/proto/google/monitoring/v3/common.proto
@@ -64,7 +64,7 @@ message TypedValue {
 //   than the end time.
 //
 // * In all cases, the start time of the next interval must be
-//   at least a microsecond after the end time of the previous interval.
+//   at least a millisecond after the end time of the previous interval.
 //   Because the interval is closed, if the start time of a new interval
 //   is the same as the end time of the previous interval, data written
 //   at the new start time could overwrite data written at the previous
diff --git a/synth.metadata b/synth.metadata
index ed8cb3db..aed9b289 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -11,8 +11,8 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "b21bc9b46e3263cd4ebe50f60c61589e3fe797f2",
-        "internalRef": "305797556"
+        "sha": "160e3187dc93265ed635ad68e12c483c8ab4f7be",
+        "internalRef": "306560315"
       }
     },
     {