diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 8c8cc762ab1f..9654626aba0b 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -58,7 +58,7 @@
   "packages/google-cloud-deploy": "3.7.0",
   "packages/google-cloud-dialogflow": "6.7.0",
   "packages/google-cloud-dialogflow-cx": "4.7.0",
-  "packages/google-cloud-discoveryengine": "1.8.0",
+  "packages/google-cloud-discoveryengine": "1.9.0",
   "packages/google-cloud-dns": "4.1.0",
   "packages/google-cloud-documentai": "8.7.0",
   "packages/google-cloud-domains": "3.2.0",
diff --git a/changelog.json b/changelog.json
index d2c1c468b81d..c91a2e23fae5 100644
--- a/changelog.json
+++ b/changelog.json
@@ -1,6 +1,23 @@
 {
   "repository": "googleapis/google-cloud-node",
   "entries": [
+    {
+      "changes": [
+        {
+          "type": "feat",
+          "sha": "d1bee15d1460292b6c637182328d1367fca6bc62",
+          "message": "[discoveryengine] promote grounding check APIs to v1 GA",
+          "issues": [
+            "5387"
+          ]
+        }
+      ],
+      "version": "1.9.0",
+      "language": "JAVASCRIPT",
+      "artifactName": "@google-cloud/discoveryengine",
+      "id": "639447a5-9885-4397-a66f-401b45d77e44",
+      "createTime": "2024-05-28T15:34:29.378Z"
+    },
     {
       "changes": [
         {
@@ -34097,5 +34114,5 @@
       "createTime": "2023-01-28T04:18:24.718Z"
     }
   ],
-  "updateTime": "2024-05-23T18:44:11.657Z"
+  "updateTime": "2024-05-28T15:34:29.378Z"
 }
\ No newline at end of file
diff --git a/packages/google-cloud-discoveryengine/CHANGELOG.md b/packages/google-cloud-discoveryengine/CHANGELOG.md
index 8564cba4ef55..5506fa44e9dc 100644
--- a/packages/google-cloud-discoveryengine/CHANGELOG.md
+++ b/packages/google-cloud-discoveryengine/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.9.0](https://github.com/googleapis/google-cloud-node/compare/discoveryengine-v1.8.0...discoveryengine-v1.9.0) (2024-05-28)
+
+
+### Features
+
+* [discoveryengine] promote grounding check APIs to v1 GA ([#5387](https://github.com/googleapis/google-cloud-node/issues/5387)) ([d1bee15](https://github.com/googleapis/google-cloud-node/commit/d1bee15d1460292b6c637182328d1367fca6bc62))
+
 ## [1.8.0](https://github.com/googleapis/google-cloud-node/compare/discoveryengine-v1.7.0...discoveryengine-v1.8.0) (2024-05-21)
 
 
diff --git a/packages/google-cloud-discoveryengine/package.json b/packages/google-cloud-discoveryengine/package.json
index df693c544a2b..e55c1185d9d8 100644
--- a/packages/google-cloud-discoveryengine/package.json
+++ b/packages/google-cloud-discoveryengine/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@google-cloud/discoveryengine",
-  "version": "1.8.0",
+  "version": "1.9.0",
   "description": "Discovery Engine API client for Node.js",
   "repository": {
     "type": "git",
diff --git a/packages/google-cloud-discoveryengine/samples/package.json b/packages/google-cloud-discoveryengine/samples/package.json
index f436a5eb17ad..d6c58b7b6d01 100644
--- a/packages/google-cloud-discoveryengine/samples/package.json
+++ b/packages/google-cloud-discoveryengine/samples/package.json
@@ -14,7 +14,7 @@
     "publish": "echo 'sample test; do not publish'"
   },
   "dependencies": {
-    "@google-cloud/discoveryengine": "^1.8.0"
+    "@google-cloud/discoveryengine": "^1.9.0"
   },
   "devDependencies": {
     "c8": "^9.0.0",