diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 114efc49936a..591c4ce788cb 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -177,7 +177,7 @@
   "google-cloud-bigquery-migration-v2+FILLER": "0.0.0",
   "google-cloud-bigquery-reservation": "1.8.1",
   "google-cloud-bigquery-reservation+FILLER": "0.0.0",
-  "google-cloud-bigquery-reservation-v1": "1.12.1",
+  "google-cloud-bigquery-reservation-v1": "1.13.0",
   "google-cloud-bigquery-reservation-v1+FILLER": "0.0.0",
   "google-cloud-bigquery-storage": "1.8.1",
   "google-cloud-bigquery-storage+FILLER": "0.0.0",
diff --git a/google-cloud-bigquery-reservation-v1/CHANGELOG.md b/google-cloud-bigquery-reservation-v1/CHANGELOG.md
index 4158b622b389..4d664b8ccce9 100644
--- a/google-cloud-bigquery-reservation-v1/CHANGELOG.md
+++ b/google-cloud-bigquery-reservation-v1/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Release History
 
+### 1.13.0 (2026-08-13)
+
+#### Features
+
+* Add a new field `condition` to `bigqueryreservation.googleapis.com/Assignment`, it is Common Expression Language (CEL) condition that defines the matching criteria for this assignment. 
+* Add a new field `precedence` to `bigqueryreservation.googleapis.com/Assignment`,  it specifies the priority precedence for this assignment. Used to resolve ambiguity when multiple assignments match a single job. Higher numerical values represent ... ([#36234](https://github.com/googleapis/google-cloud-ruby/issues/36234)) 
+
 ### 1.12.1 (2026-08-06)
 
 #### Bug Fixes
diff --git a/google-cloud-bigquery-reservation-v1/lib/google/cloud/bigquery/reservation/v1/version.rb b/google-cloud-bigquery-reservation-v1/lib/google/cloud/bigquery/reservation/v1/version.rb
index 975f37a72091..f6720ac0d460 100644
--- a/google-cloud-bigquery-reservation-v1/lib/google/cloud/bigquery/reservation/v1/version.rb
+++ b/google-cloud-bigquery-reservation-v1/lib/google/cloud/bigquery/reservation/v1/version.rb
@@ -22,7 +22,7 @@ module Cloud
     module Bigquery
       module Reservation
         module V1
-          VERSION = "1.12.1"
+          VERSION = "1.13.0"
         end
       end
     end
diff --git a/google-cloud-bigquery-reservation-v1/snippets/snippet_metadata_google.cloud.bigquery.reservation.v1.json b/google-cloud-bigquery-reservation-v1/snippets/snippet_metadata_google.cloud.bigquery.reservation.v1.json
index 0841a7e0917b..dc797d92c995 100644
--- a/google-cloud-bigquery-reservation-v1/snippets/snippet_metadata_google.cloud.bigquery.reservation.v1.json
+++ b/google-cloud-bigquery-reservation-v1/snippets/snippet_metadata_google.cloud.bigquery.reservation.v1.json
@@ -1,7 +1,7 @@
 {
   "client_library": {
     "name": "google-cloud-bigquery-reservation-v1",
-    "version": "1.12.1",
+    "version": "1.13.0",
     "language": "RUBY",
     "apis": [
       {
diff --git a/librarian.yaml b/librarian.yaml
index 51d0843f0c77..39f6b6260b8c 100644
--- a/librarian.yaml
+++ b/librarian.yaml
@@ -698,7 +698,7 @@ libraries:
       wrapper_of:
         - v1:0.11
   - name: google-cloud-bigquery-reservation-v1
-    version: 1.12.1
+    version: 1.13.0
     apis:
       - path: google/cloud/bigquery/reservation/v1
         ruby: