diff --git a/generated/google/apis/alertcenter_v1beta1.rb b/generated/google/apis/alertcenter_v1beta1.rb
index 0c35018b3..7f996d92a 100644
--- a/generated/google/apis/alertcenter_v1beta1.rb
+++ b/generated/google/apis/alertcenter_v1beta1.rb
@@ -25,7 +25,7 @@ module Google
     # @see https://developers.google.com/admin-sdk/alertcenter/
     module AlertcenterV1beta1
       VERSION = 'V1beta1'
-      REVISION = '20190209'
+      REVISION = '20190221'
 
       # See and delete your domain's G Suite alerts, and send alert feedback
       AUTH_APPS_ALERTS = 'https://www.googleapis.com/auth/apps.alerts'
diff --git a/generated/google/apis/alertcenter_v1beta1/classes.rb b/generated/google/apis/alertcenter_v1beta1/classes.rb
index 4db156930..1a734ecc2 100644
--- a/generated/google/apis/alertcenter_v1beta1/classes.rb
+++ b/generated/google/apis/alertcenter_v1beta1/classes.rb
@@ -80,7 +80,7 @@ module Google
       
         # Optional. The time the event that caused this alert ceased being active.
         # If provided, the end time must not be earlier than the start time.
-        # If not provided, the end time defaults to the start time.
+        # If not provided, it indicates an ongoing alert.
         # Corresponds to the JSON property `endTime`
         # @return [String]
         attr_accessor :end_time