diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index a0bccd57247b..80a12e136f0e 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -771,7 +771,7 @@
   "google-cloud-security_center-v1+FILLER": "0.0.0",
   "google-cloud-security_center-v1p1beta1": "0.22.0",
   "google-cloud-security_center-v1p1beta1+FILLER": "0.0.0",
-  "google-cloud-security_center-v2": "1.8.0",
+  "google-cloud-security_center-v2": "1.9.0",
   "google-cloud-security_center-v2+FILLER": "0.0.0",
   "google-cloud-security_center_management": "1.4.0",
   "google-cloud-security_center_management+FILLER": "0.0.0",
diff --git a/google-cloud-security_center-v2/CHANGELOG.md b/google-cloud-security_center-v2/CHANGELOG.md
index a33d3dcc6726..f66d8608db4e 100644
--- a/google-cloud-security_center-v2/CHANGELOG.md
+++ b/google-cloud-security_center-v2/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+### 1.9.0 (2026-07-16)
+
+#### Features
+
+* add agent, agent_sessions, and agent_anomaly fields to Finding ([#34758](https://github.com/googleapis/google-cloud-ruby/issues/34758)) 
+
 ### 1.8.0 (2026-06-11)
 
 #### Features
diff --git a/google-cloud-security_center-v2/lib/google/cloud/security_center/v2/version.rb b/google-cloud-security_center-v2/lib/google/cloud/security_center/v2/version.rb
index fb91a2e18a52..f8ead68cf98c 100644
--- a/google-cloud-security_center-v2/lib/google/cloud/security_center/v2/version.rb
+++ b/google-cloud-security_center-v2/lib/google/cloud/security_center/v2/version.rb
@@ -21,7 +21,7 @@ module Google
   module Cloud
     module SecurityCenter
       module V2
-        VERSION = "1.8.0"
+        VERSION = "1.9.0"
       end
     end
   end
diff --git a/google-cloud-security_center-v2/snippets/snippet_metadata_google.cloud.securitycenter.v2.json b/google-cloud-security_center-v2/snippets/snippet_metadata_google.cloud.securitycenter.v2.json
index 655185d22c06..17ce02190299 100644
--- a/google-cloud-security_center-v2/snippets/snippet_metadata_google.cloud.securitycenter.v2.json
+++ b/google-cloud-security_center-v2/snippets/snippet_metadata_google.cloud.securitycenter.v2.json
@@ -1,7 +1,7 @@
 {
   "client_library": {
     "name": "google-cloud-security_center-v2",
-    "version": "1.8.0",
+    "version": "1.9.0",
     "language": "RUBY",
     "apis": [
       {