diff --git a/generated/google-apis-sts_v1beta/CHANGELOG.md b/generated/google-apis-sts_v1beta/CHANGELOG.md
index d4294091e..48fda8e1e 100644
--- a/generated/google-apis-sts_v1beta/CHANGELOG.md
+++ b/generated/google-apis-sts_v1beta/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Release history for google-apis-sts_v1beta
 
+### v0.2.0 (2021-01-15)
+
+* 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-sts_v1beta/lib/google/apis/sts_v1beta/classes.rb b/generated/google-apis-sts_v1beta/lib/google/apis/sts_v1beta/classes.rb
index 00dfa67a2..0f580252e 100644
--- a/generated/google-apis-sts_v1beta/lib/google/apis/sts_v1beta/classes.rb
+++ b/generated/google-apis-sts_v1beta/lib/google/apis/sts_v1beta/classes.rb
@@ -121,7 +121,10 @@ module Google
         # @return [String]
         attr_accessor :subject_token
       
-        # Required. `urn:ietf:params:oauth:token-type:access_token`.
+        # Required. An identifier that indicates the type of the security token in the `
+        # subject_token` parameter. Supported values are `urn:ietf:params:oauth:token-
+        # type:jwt`, `urn:ietf:params:aws:token-type:aws4_request`, and `urn:ietf:params:
+        # oauth:token-type:access_token`.
         # Corresponds to the JSON property `subjectTokenType`
         # @return [String]
         attr_accessor :subject_token_type
@@ -154,10 +157,10 @@ module Google
         # @return [String]
         attr_accessor :access_token
       
-        # The amount of time, in seconds, between the time when the `access_token` was
-        # issued and the time when the `access_token` will expire. This field is absent
+        # The amount of time, in seconds, between the time when the access token was
+        # issued and the time when the access token will expire. This field is absent
         # when the `subject_token` in the request is a Google-issued, short-lived access
-        # token. In this case, the `access_token` has the same expiration time as the `
+        # token. In this case, the access token has the same expiration time as the `
         # subject_token`.
         # Corresponds to the JSON property `expires_in`
         # @return [Fixnum]
@@ -169,7 +172,7 @@ module Google
         # @return [String]
         attr_accessor :issued_token_type
       
-        # The type of `access_token`. Always has the value `Bearer`.
+        # The type of access token. Always has the value `Bearer`.
         # Corresponds to the JSON property `token_type`
         # @return [String]
         attr_accessor :token_type
diff --git a/generated/google-apis-sts_v1beta/lib/google/apis/sts_v1beta/gem_version.rb b/generated/google-apis-sts_v1beta/lib/google/apis/sts_v1beta/gem_version.rb
index c7f3c504a..b8f8d0ef4 100644
--- a/generated/google-apis-sts_v1beta/lib/google/apis/sts_v1beta/gem_version.rb
+++ b/generated/google-apis-sts_v1beta/lib/google/apis/sts_v1beta/gem_version.rb
@@ -16,13 +16,13 @@ module Google
   module Apis
     module StsV1beta
       # Version of the google-apis-sts_v1beta 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 = "20201009"
+      REVISION = "20210109"
     end
   end
 end
diff --git a/generated/google-apis-sts_v1beta/synth.metadata b/generated/google-apis-sts_v1beta/synth.metadata
index 429012f74..9cee8f38c 100644
--- a/generated/google-apis-sts_v1beta/synth.metadata
+++ b/generated/google-apis-sts_v1beta/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/google-api-ruby-client.git",
-        "sha": "c98c719bbab68d0890524d53f8b629d7858af9c2"
+        "sha": "920c90729ba035ad1d159a09f865db6e0bc6b167"
       }
     }
   ]