diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index a0bccd57247b..eafab052f0ea 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -531,7 +531,7 @@
   "google-cloud-lustre+FILLER": "0.0.0",
   "google-cloud-lustre-v1": "0.7.0",
   "google-cloud-lustre-v1+FILLER": "0.0.0",
-  "google-cloud-maintenance-api": "0.3.0",
+  "google-cloud-maintenance-api": "0.4.0",
   "google-cloud-maintenance-api+FILLER": "0.0.0",
   "google-cloud-maintenance-api-v1": "0.4.0",
   "google-cloud-maintenance-api-v1+FILLER": "0.0.0",
diff --git a/google-cloud-maintenance-api/CHANGELOG.md b/google-cloud-maintenance-api/CHANGELOG.md
index 2046cff38472..5be8794505c5 100644
--- a/google-cloud-maintenance-api/CHANGELOG.md
+++ b/google-cloud-maintenance-api/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+### 0.4.0 (2026-07-16)
+
+#### Features
+
+* Release GA version 1.0.0 ([#34791](https://github.com/googleapis/google-cloud-ruby/issues/34791)) 
+
 ### 0.3.0 (2026-06-11)
 
 #### Features
@@ -25,4 +31,3 @@
 * Initial generation of google-cloud-maintenance-api ([#30686](https://github.com/googleapis/google-cloud-ruby/issues/30686)) 
 
 ## Release History
-
diff --git a/google-cloud-maintenance-api/lib/google/cloud/maintenance/api/version.rb b/google-cloud-maintenance-api/lib/google/cloud/maintenance/api/version.rb
index 8f7a7b6e2052..c6522aa1d748 100644
--- a/google-cloud-maintenance-api/lib/google/cloud/maintenance/api/version.rb
+++ b/google-cloud-maintenance-api/lib/google/cloud/maintenance/api/version.rb
@@ -21,7 +21,7 @@ module Google
   module Cloud
     module Maintenance
       module Api
-        VERSION = "0.3.0"
+        VERSION = "0.4.0"
       end
     end
   end