diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 114efc49936a..cd6b0b53dd45 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,5 +1,5 @@
 {
-  "google-ads-ad_manager": "5.0.2",
+  "google-ads-ad_manager": "5.1.0",
   "google-ads-ad_manager+FILLER": "0.0.0",
   "google-ads-ad_manager-v1": "5.0.2",
   "google-ads-ad_manager-v1+FILLER": "0.0.0",
diff --git a/google-ads-ad_manager/CHANGELOG.md b/google-ads-ad_manager/CHANGELOG.md
index f41af8ad37f2..d48af03ba622 100644
--- a/google-ads-ad_manager/CHANGELOG.md
+++ b/google-ads-ad_manager/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+### 5.1.0 (2026-08-13)
+
+#### Features
+
+* update API sources and regenerate ([#36241](https://github.com/googleapis/google-cloud-ruby/issues/36241)) 
+
 ### 5.0.2 (2026-08-11)
 
 #### Documentation
diff --git a/google-ads-ad_manager/lib/google/ads/ad_manager/version.rb b/google-ads-ad_manager/lib/google/ads/ad_manager/version.rb
index aa4019b18b72..8c4582de7b51 100644
--- a/google-ads-ad_manager/lib/google/ads/ad_manager/version.rb
+++ b/google-ads-ad_manager/lib/google/ads/ad_manager/version.rb
@@ -20,7 +20,7 @@
 module Google
   module Ads
     module AdManager
-      VERSION = "5.0.2"
+      VERSION = "5.1.0"
     end
   end
 end
diff --git a/librarian.yaml b/librarian.yaml
index 51d0843f0c77..ea4d26becb8c 100644
--- a/librarian.yaml
+++ b/librarian.yaml
@@ -28,7 +28,7 @@ tools:
     sha256: b24b53f87c151bfd48b112fe4c3a6e6574e5198874f38036aff41df3456b8caf
 libraries:
   - name: google-ads-ad_manager
-    version: 5.0.2
+    version: 5.1.0
     apis:
       - path: google/ads/admanager/v1
     ruby: