diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index c328103dab44..7f4bdedc023f 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -695,7 +695,7 @@
   "google-cloud-profiler-v2+FILLER": "0.0.0",
   "google-cloud-pubsub": "3.5.0",
   "google-cloud-pubsub+FILLER": "0.0.0",
-  "google-cloud-pubsub-v1": "1.17.0",
+  "google-cloud-pubsub-v1": "1.18.0",
   "google-cloud-pubsub-v1+FILLER": "0.0.0",
   "google-cloud-rapid_migration_assessment": "2.2.1",
   "google-cloud-rapid_migration_assessment+FILLER": "0.0.0",
diff --git a/google-cloud-pubsub-v1/CHANGELOG.md b/google-cloud-pubsub-v1/CHANGELOG.md
index fa4953440094..72201d232750 100644
--- a/google-cloud-pubsub-v1/CHANGELOG.md
+++ b/google-cloud-pubsub-v1/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Release History
 
+### 1.18.0 (2026-09-17)
+
+#### Features
+
+* update API sources and regenerate ([#36568](https://github.com/googleapis/google-cloud-ruby/issues/36568)) 
+
 ### 1.17.0 (2026-08-27)
 
 #### Features
diff --git a/google-cloud-pubsub-v1/lib/google/cloud/pubsub/v1/version.rb b/google-cloud-pubsub-v1/lib/google/cloud/pubsub/v1/version.rb
index 4e1f5b14546c..e0652ac075c4 100644
--- a/google-cloud-pubsub-v1/lib/google/cloud/pubsub/v1/version.rb
+++ b/google-cloud-pubsub-v1/lib/google/cloud/pubsub/v1/version.rb
@@ -21,7 +21,7 @@ module Google
   module Cloud
     module PubSub
       module V1
-        VERSION = "1.17.0"
+        VERSION = "1.18.0"
       end
     end
   end
diff --git a/librarian.yaml b/librarian.yaml
index 06d415d791eb..12fdca3efc06 100644
--- a/librarian.yaml
+++ b/librarian.yaml
@@ -2753,7 +2753,7 @@ libraries:
           ruby_cloud_opts:
             ruby-cloud-env-prefix: PROFILER
   - name: google-cloud-pubsub-v1
-    version: 1.17.0
+    version: 1.18.0
     apis:
       - path: google/pubsub/v1
         ruby: