diff --git a/generated/google-apis-billingbudgets_v1/CHANGELOG.md b/generated/google-apis-billingbudgets_v1/CHANGELOG.md
index f5398157a..ced5d9eff 100644
--- a/generated/google-apis-billingbudgets_v1/CHANGELOG.md
+++ b/generated/google-apis-billingbudgets_v1/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Release history for google-apis-billingbudgets_v1
 
+### v0.2.0 (2021-01-13)
+
+* Regenerated from discovery document revision 20210109
+
 ### v0.1.0 (2021-01-07)
 
 * Regenerated using generator version 0.1.1
diff --git a/generated/google-apis-billingbudgets_v1/lib/google/apis/billingbudgets_v1/classes.rb b/generated/google-apis-billingbudgets_v1/lib/google/apis/billingbudgets_v1/classes.rb
index de3aa7b38..961e95cef 100644
--- a/generated/google-apis-billingbudgets_v1/lib/google/apis/billingbudgets_v1/classes.rb
+++ b/generated/google-apis-billingbudgets_v1/lib/google/apis/billingbudgets_v1/classes.rb
@@ -263,10 +263,10 @@ module Google
         # @return [String]
         attr_accessor :pubsub_topic
       
-        # Optional. The schema version of the notification sent to `pubsub_topic`. Only "
-        # 1.0" is accepted. It represents the JSON schema as defined in https://cloud.
-        # google.com/billing/docs/how-to/budgets-programmatic-notifications#
-        # notification_format
+        # Optional. Required when NotificationsRule.pubsub_topic is set. The schema
+        # version of the notification sent to NotificationsRule.pubsub_topic. Only "1.0"
+        # is accepted. It represents the JSON schema as defined in https://cloud.google.
+        # com/billing/docs/how-to/budgets-programmatic-notifications#notification_format.
         # Corresponds to the JSON property `schemaVersion`
         # @return [String]
         attr_accessor :schema_version
diff --git a/generated/google-apis-billingbudgets_v1/lib/google/apis/billingbudgets_v1/gem_version.rb b/generated/google-apis-billingbudgets_v1/lib/google/apis/billingbudgets_v1/gem_version.rb
index eb9e2e4a4..0a01df23d 100644
--- a/generated/google-apis-billingbudgets_v1/lib/google/apis/billingbudgets_v1/gem_version.rb
+++ b/generated/google-apis-billingbudgets_v1/lib/google/apis/billingbudgets_v1/gem_version.rb
@@ -16,13 +16,13 @@ module Google
   module Apis
     module BillingbudgetsV1
       # Version of the google-apis-billingbudgets_v1 gem
-      GEM_VERSION = "0.1.0"
+      GEM_VERSION = "0.2.0"
 
       # Version of the code generator used to generate this client
       GENERATOR_VERSION = "0.1.1"
 
       # Revision of the discovery document this client was generated from
-      REVISION = "20201107"
+      REVISION = "20210109"
     end
   end
 end
diff --git a/generated/google-apis-billingbudgets_v1/synth.metadata b/generated/google-apis-billingbudgets_v1/synth.metadata
index 1f8508191..f129ef828 100644
--- a/generated/google-apis-billingbudgets_v1/synth.metadata
+++ b/generated/google-apis-billingbudgets_v1/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/google-api-ruby-client.git",
-        "sha": "0ba45b6d22f2eced00e873b91fc685285919d4ff"
+        "sha": "6208f81e4f7da30fd8168b669200bff7721929cc"
       }
     }
   ]