diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 475f2d2bf22d..17e23e3068a6 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -20,7 +20,7 @@
   "core/paginator": "6.0.2",
   "core/precise-date": "5.1.0",
   "core/projectify": "5.1.0",
-  "core/promisify": "5.1.0",
+  "core/promisify": "5.2.0",
   "handwritten/bigquery": "8.3.1",
   "handwritten/bigquery-storage": "5.1.2",
   "handwritten/bigtable": "6.5.1",
diff --git a/changelog.json b/changelog.json
index 1c03f2cb2d86..904ee6fddd5f 100644
--- a/changelog.json
+++ b/changelog.json
@@ -1,6 +1,23 @@
 {
   "repository": "googleapis/google-cloud-node",
   "entries": [
+    {
+      "changes": [
+        {
+          "type": "feat",
+          "sha": "e9d308b814c3d6d97bb39873a398ba0aea807718",
+          "message": "Update API sources and regenerate",
+          "issues": [
+            "8914"
+          ]
+        }
+      ],
+      "version": "5.2.0",
+      "language": "JAVASCRIPT",
+      "artifactName": "@google-cloud/promisify",
+      "id": "42bed0db-c40d-4cab-a3cc-3be60714bc30",
+      "createTime": "2026-07-23T06:10:31.533Z"
+    },
     {
       "changes": [
         {
diff --git a/core/promisify/CHANGELOG.md b/core/promisify/CHANGELOG.md
index f316543511e9..fda148ebb1f9 100644
--- a/core/promisify/CHANGELOG.md
+++ b/core/promisify/CHANGELOG.md
@@ -5,6 +5,13 @@
 
 [1]: https://www.npmjs.com/package/nodejs-promisify?activeTab=versions
 
+## [5.2.0](https://github.com/googleapis/google-cloud-node/compare/promisify-v5.1.0...promisify-v5.2.0) (2026-07-23)
+
+
+### Features
+
+* Update API sources and regenerate ([#8914](https://github.com/googleapis/google-cloud-node/issues/8914)) ([e9d308b](https://github.com/googleapis/google-cloud-node/commit/e9d308b814c3d6d97bb39873a398ba0aea807718))
+
 ## [5.1.0](https://github.com/googleapis/google-cloud-node/compare/promisify-v5.0.1...promisify-v5.1.0) (2026-06-24)
 
 
diff --git a/core/promisify/package.json b/core/promisify/package.json
index 1515b4760df8..362e72607a52 100644
--- a/core/promisify/package.json
+++ b/core/promisify/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@google-cloud/promisify",
-  "version": "5.1.0",
+  "version": "5.2.0",
   "description": "A simple utility for promisifying functions and classes.",
   "main": "build/src/index.js",
   "types": "build/src/index.d.ts",