diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 5aebfdad..404c8638 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -25,7 +25,7 @@ jobs:
       - run: npm install
       - run: npm test
       - name: coverage
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           name: actions ${{ matrix.node }}
           fail_ci_if_error: false
@@ -39,7 +39,7 @@ jobs:
       - run: npm install
       - run: npm test
       - name: coverage
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           name: actions windows
           fail_ci_if_error: false
diff --git a/.readme-partials.yaml b/.readme-partials.yaml
index c2531d61..b6d1462d 100644
--- a/.readme-partials.yaml
+++ b/.readme-partials.yaml
@@ -5,6 +5,12 @@ introduction: |-
 
   A Firebase Realtime Database instance is used to store your data.
 
+  ## Project Status: Archived
+
+  This project has been archived and is no longer supported. There will be no
+  further bug fixes or security patches. The repository can be forked by users
+  if they want to maintain it going forward.
+
 body: |-
   ## Debugger Agent Settings
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 720283c4..9f54f7e5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Node.js Agent for Google Cloud Debug ChangeLog
 
+## [9.0.1](https://github.com/googleapis/cloud-debug-nodejs/compare/v9.0.0...v9.0.1) (2024-02-01)
+
+
+### Bug Fixes
+
+* Repair broken test on Node 20 ([#1193](https://github.com/googleapis/cloud-debug-nodejs/issues/1193)) ([a600ea8](https://github.com/googleapis/cloud-debug-nodejs/commit/a600ea8f7868a852d47ba485c0d49864339eb072))
+
 ## [9.0.0](https://github.com/googleapis/cloud-debug-nodejs/compare/v8.0.0...v9.0.0) (2023-12-21)
 
 
diff --git a/README.md b/README.md
index 5810e45b..8ff8046d 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,12 @@ applications in production without stopping or pausing your application.
 
 A Firebase Realtime Database instance is used to store your data.
 
+## Project Status: Archived
+
+This project has been archived and is no longer supported. There will be no
+further bug fixes or security patches. The repository can be forked by users
+if they want to maintain it going forward.
+
 
 A comprehensive list of changes in each version may be found in
 [the CHANGELOG](https://github.com/googleapis/cloud-debug-nodejs/blob/main/CHANGELOG.md).
diff --git a/package.json b/package.json
index be161b7f..f9387d74 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@google-cloud/debug-agent",
-  "version": "9.0.0",
+  "version": "9.0.1",
   "author": "Google Inc.",
   "description": "Stackdriver Debug Agent for Node.js",
   "main": "./build/src/index",
diff --git a/samples/README.md b/samples/README.md
index e6854afa..977c5173 100644
--- a/samples/README.md
+++ b/samples/README.md
@@ -12,6 +12,12 @@ applications in production without stopping or pausing your application.
 
 A Firebase Realtime Database instance is used to store your data.
 
+## Project Status: Archived
+
+This project has been archived and is no longer supported. There will be no
+further bug fixes or security patches. The repository can be forked by users
+if they want to maintain it going forward.
+
 ## Table of Contents
 
 * [Before you begin](#before-you-begin)
diff --git a/samples/package.json b/samples/package.json
index d7055e71..48d7a203 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -17,7 +17,7 @@
     "test": "mocha"
   },
   "dependencies": {
-    "@google-cloud/debug-agent": "^9.0.0",
+    "@google-cloud/debug-agent": "^9.0.1",
     "express": "4.18.2"
   },
   "devDependencies": {
diff --git a/test/test-evaluated-expressions.ts b/test/test-evaluated-expressions.ts
index b6fe07ee..a25eebe9 100644
--- a/test/test-evaluated-expressions.ts
+++ b/test/test-evaluated-expressions.ts
@@ -234,7 +234,8 @@ describe('debugger provides useful information', () => {
           // TODO: investigate why "readable" field is not returned by debugger
           // as of Node 14:
           // {name: 'readable', value: 'true'},
-          {name: '_eventsCount', value: '0'},
+          // NOTE: "_eventsCount" is no longer returned by debugger in Node 20.
+          // {name: '_eventsCount', value: '0'},
           {name: '_maxListeners', value: 'undefined'},
           {name: 'complete', value: 'false'},
           {name: 'url', value: ''},