diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..1f7b731
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,40 @@
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version: [18, 20, 22]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+      - name: Setup Node.js
+        uses: actions/setup-node@v5
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install
+        run: npm install
+      - name: Test / Lint / Codestyle
+        run: make all
+  test-optional:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version: [24]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+      - name: Setup Node.js
+        uses: actions/setup-node@v5
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install
+        run: npm install
+      - name: Test / Lint / Codestyle
+        run: make all
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 396be4c..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-cache:
-   npm: false
-language: node_js
-node_js:
-   - '8'
-   - '10'
-   - '12'
-   - "lts/*"                # Active LTS release
-   - "node"                 # Latest stable release
-after_success:
-    - make report-coverage
diff --git a/Makefile b/Makefile
index e4f760d..22a5c57 100644
--- a/Makefile
+++ b/Makefile
@@ -20,7 +20,6 @@ COVERAGE	:= $(ROOT)/coverage
 #
 # Tools and binaries
 #
-YARN		:= yarn
 NPM		:= npm
 COVERALLS	:= $(NODE_BIN)/coveralls
 ESLINT		:= $(NODE_BIN)/eslint
@@ -36,7 +35,7 @@ CONVENTIONAL_RECOMMENDED_BUMP := $(NODE_BIN)/conventional-recommended-bump
 #
 LCOV		:= $(ROOT)/coverage/lcov.info
 PACKAGE_JSON	:= $(ROOT)/package.json
-YARN_LOCK       := $(ROOT)/yarn.lock
+PKG_LOCK       := $(ROOT)/package-lock.json
 GITHOOKS	:= $(wildcard $(GITHOOKS_SRC)/*)
 ALL_FILES	:= $(shell find $(ROOT) \
 			-not \( -path $(NODE_MODULES) -prune \) \
@@ -59,12 +58,12 @@ help:
 all: node_modules lint test clean-coverage
 
 
-$(YARN_LOCK): $(PACKAGE_JSON)
-	@$(YARN)
+$(PKG_LOCK): $(PACKAGE_JSON)
+	@$(NPM) install
 
 
 $(NODE_MODULES): $(PACKAGE_JSON)
-	@$(YARN)
+	@$(NPM) install
 	@touch $(NODE_MODULES)
 
 
diff --git a/README.md b/README.md
index ce33947..4507876 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,6 @@
 # restify-errors
 
-[![NPM Version](https://img.shields.io/npm/v/restify-errors.svg)](https://npmjs.org/package/restify-errors)
-[![Build Status](https://travis-ci.org/restify/errors.svg?branch=master)](https://travis-ci.org/restify/errors)
-[![Coverage Status](https://coveralls.io/repos/restify/errors/badge.svg?branch=master)](https://coveralls.io/r/restify/errors?branch=master)
-[![Dependency Status](https://david-dm.org/restify/errors.svg)](https://david-dm.org/restify/errors)
-[![devDependency Status](https://david-dm.org/restify/errors/dev-status.svg)](https://david-dm.org/restify/errors#info=devDependencies)
+[![Build Status](https://github.com/restify/errors/actions/workflows/test.yml/badge.svg)](https://github.com/restify/errors/actions/workflows/test.yml)
 
 > A collection of HTTP and REST Error constructors.
 
diff --git a/lib/baseClasses/HttpError.js b/lib/baseClasses/HttpError.js
index 106ae2e..d5f0428 100644
--- a/lib/baseClasses/HttpError.js
+++ b/lib/baseClasses/HttpError.js
@@ -159,7 +159,8 @@ HttpError.prototype.toJSON = function toJSON() {
 
     return {
         code: self.body.code,
-        message: message
+        message: message,
+        cause: self.cause
     };
 };
 
diff --git a/package.json b/package.json
index 0721752..1e6b0e9 100644
--- a/package.json
+++ b/package.json
@@ -44,8 +44,8 @@
     "mkdirp": "^0.5.1",
     "mocha": "^6.2.2",
     "nyc": "^14.1.1",
-    "restify": "^8.5.0",
-    "restify-clients": "^2.6.7",
+    "restify": "^11.1.0",
+    "restify-clients": "^4.2.0",
     "unleash": "^2.0.1"
   },
   "optionalDependencies": {