diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index a0bccd57247b..9d62403a8206 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -653,7 +653,7 @@
   "google-cloud-parallelstore-v1beta+FILLER": "0.0.0",
   "google-cloud-parameter_manager": "0.3.0",
   "google-cloud-parameter_manager+FILLER": "0.0.0",
-  "google-cloud-parameter_manager-v1": "0.8.0",
+  "google-cloud-parameter_manager-v1": "0.9.0",
   "google-cloud-parameter_manager-v1+FILLER": "0.0.0",
   "google-cloud-phishing_protection": "0.18.0",
   "google-cloud-phishing_protection+FILLER": "0.0.0",
diff --git a/google-cloud-parameter_manager-v1/CHANGELOG.md b/google-cloud-parameter_manager-v1/CHANGELOG.md
index ccb12aaf954d..8f3b1c0521c4 100644
--- a/google-cloud-parameter_manager-v1/CHANGELOG.md
+++ b/google-cloud-parameter_manager-v1/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+### 0.9.0 (2026-07-16)
+
+#### Features
+
+* Release GA version 1.0.0 ([#34791](https://github.com/googleapis/google-cloud-ruby/issues/34791)) 
+
 ### 0.8.0 (2026-06-11)
 
 #### Features
@@ -68,4 +74,3 @@
 * Initial generation of google-cloud-parameter_manager-v1 ([#29265](https://github.com/googleapis/google-cloud-ruby/issues/29265)) 
 
 ## Release History
-
diff --git a/google-cloud-parameter_manager-v1/lib/google/cloud/parameter_manager/v1/version.rb b/google-cloud-parameter_manager-v1/lib/google/cloud/parameter_manager/v1/version.rb
index adaa3bbbe181..ae96f5277d7a 100644
--- a/google-cloud-parameter_manager-v1/lib/google/cloud/parameter_manager/v1/version.rb
+++ b/google-cloud-parameter_manager-v1/lib/google/cloud/parameter_manager/v1/version.rb
@@ -21,7 +21,7 @@ module Google
   module Cloud
     module ParameterManager
       module V1
-        VERSION = "0.8.0"
+        VERSION = "0.9.0"
       end
     end
   end
diff --git a/google-cloud-parameter_manager-v1/snippets/snippet_metadata_google.cloud.parametermanager.v1.json b/google-cloud-parameter_manager-v1/snippets/snippet_metadata_google.cloud.parametermanager.v1.json
index f0d83031f6f4..3a8c8b66eef5 100644
--- a/google-cloud-parameter_manager-v1/snippets/snippet_metadata_google.cloud.parametermanager.v1.json
+++ b/google-cloud-parameter_manager-v1/snippets/snippet_metadata_google.cloud.parametermanager.v1.json
@@ -1,7 +1,7 @@
 {
   "client_library": {
     "name": "google-cloud-parameter_manager-v1",
-    "version": "0.8.0",
+    "version": "0.9.0",
     "language": "RUBY",
     "apis": [
       {