diff --git a/.eslintrc.yml b/.eslintrc.yml
index 1eece14..6d49a7d 100644
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@@ -1,2 +1,19 @@
 root: true
-extends: standard
+extends:
+  - standard
+  - plugin:markdown/recommended
+plugins:
+  - markdown
+overrides:
+  - files: '**/*.md'
+    processor: 'markdown/markdown'
+rules:
+  eol-last: error
+  indent:
+    - error
+    - 2
+    - SwitchCase: 1
+  no-trailing-spaces: error
+  semi:
+    - error
+    - never
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..e96cc35
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,173 @@
+name: ci
+
+on:
+- pull_request
+- push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        name:
+        - Node.js 0.10
+        - Node.js 0.12
+        - io.js 1.x
+        - io.js 2.x
+        - io.js 3.x
+        - Node.js 4.x
+        - Node.js 5.x
+        - Node.js 6.x
+        - Node.js 7.x
+        - Node.js 8.x
+        - Node.js 9.x
+        - Node.js 10.x
+        - Node.js 11.x
+        - Node.js 12.x
+        - Node.js 13.x
+        - Node.js 14.x
+        - Node.js 15.x
+        - Node.js 16.x
+        - Node.js 17.x
+
+        include:
+        - name: Node.js 0.10
+          node-version: "0.10"
+          npm-i: mocha@3.5.3 nyc@10.3.2 supertest@2.0.0
+
+        - name: Node.js 0.12
+          node-version: "0.12"
+          npm-i: mocha@3.5.3 nyc@10.3.2 supertest@2.0.0
+
+        - name: io.js 1.x
+          node-version: "1.8"
+          npm-i: mocha@3.5.3 nyc@10.3.2 supertest@2.0.0
+
+        - name: io.js 2.x
+          node-version: "2.5"
+          npm-i: mocha@3.5.3 nyc@10.3.2 supertest@2.0.0
+
+        - name: io.js 3.x
+          node-version: "3.3"
+          npm-i: mocha@3.5.3 nyc@10.3.2 supertest@2.0.0
+
+        - name: Node.js 4.x
+          node-version: "4.9"
+          npm-i: mocha@5.2.0 nyc@11.9.0 supertest@3.4.2
+
+        - name: Node.js 5.x
+          node-version: "5.12"
+          npm-i: mocha@5.2.0 nyc@11.9.0 supertest@3.4.2
+
+        - name: Node.js 6.x
+          node-version: "6.17"
+          npm-i: mocha@6.2.2 nyc@14.1.1
+
+        - name: Node.js 7.x
+          node-version: "7.10"
+          npm-i: mocha@6.2.2 nyc@14.1.1
+
+        - name: Node.js 8.x
+          node-version: "8.17"
+          npm-i: mocha@7.2.0
+
+        - name: Node.js 9.x
+          node-version: "9.11"
+          npm-i: mocha@7.2.0
+
+        - name: Node.js 10.x
+          node-version: "10.24"
+          npm-i: mocha@8.4.0
+
+        - name: Node.js 11.x
+          node-version: "11.15"
+          npm-i: mocha@8.4.0
+
+        - name: Node.js 12.x
+          node-version: "12.22"
+
+        - name: Node.js 13.x
+          node-version: "13.14"
+
+        - name: Node.js 14.x
+          node-version: "14.18"
+
+        - name: Node.js 15.x
+          node-version: "15.14"
+
+        - name: Node.js 16.x
+          node-version: "16.13"
+
+        - name: Node.js 17.x
+          node-version: "17.1"
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install Node.js ${{ matrix.node-version }}
+      shell: bash -eo pipefail -l {0}
+      run: |
+        nvm install --default ${{ matrix.node-version }}
+        dirname "$(nvm which ${{ matrix.node-version }})" >> "$GITHUB_PATH"
+
+    - name: Configure npm
+      run: npm config set shrinkwrap false
+
+    - name: Install npm module(s) ${{ matrix.npm-i }}
+      run: npm install --save-dev ${{ matrix.npm-i }}
+      if: matrix.npm-i != ''
+
+    - name: Setup Node.js version-specific dependencies
+      shell: bash
+      run: |
+        # eslint for linting
+        # - remove on Node.js < 10
+        if [[ "$(cut -d. -f1 <<< "${{ matrix.node-version }}")" -lt 10 ]]; then
+          node -pe 'Object.keys(require("./package").devDependencies).join("\n")' | \
+            grep -E '^eslint(-|$)' | \
+            sort -r | \
+            xargs -n1 npm rm --silent --save-dev
+        fi
+
+    - name: Install Node.js dependencies
+      run: npm install
+
+    - name: List environment
+      id: list_env
+      shell: bash
+      run: |
+        echo "node@$(node -v)"
+        echo "npm@$(npm -v)"
+        npm -s ls ||:
+        (npm -s ls --depth=0 ||:) | awk -F'[ @]' 'NR>1 && $2 { print "::set-output name=" $2 "::" $3 }'
+
+    - name: Run tests
+      shell: bash
+      run: |
+        if npm -ps ls nyc | grep -q nyc; then
+          npm run test-ci
+        else
+          npm test
+        fi
+
+    - name: Lint code
+      if: steps.list_env.outputs.eslint != ''
+      run: npm run lint
+
+    - name: Collect code coverage
+      uses: coverallsapp/github-action@master
+      if: steps.list_env.outputs.nyc != ''
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        flag-name: run-${{ matrix.test_number }}
+        parallel: true
+
+  coverage:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: Upload code coverage
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.github_token }}
+        parallel-finished: true
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 357893a..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,103 +0,0 @@
-language: node_js
-node_js:
-  - "0.10"
-  - "0.12"
-  - "1.8"
-  - "2.5"
-  - "3.3"
-  - "4.9"
-  - "5.12"
-  - "6.17"
-  - "7.10"
-  - "8.17"
-  - "9.11"
-  - "10.19"
-  - "11.15"
-  - "12.16"
-  - "13.11"
-cache:
-  directories:
-    - node_modules
-before_install:
-  - |
-    # Setup utility functions
-    function node_version_lt () {
-      [[ "$(v "$TRAVIS_NODE_VERSION")" -lt "$(v "${1}")" ]]
-    }
-    function npm_module_installed () {
-      npm -lsp ls | grep -Fq "$(pwd)/node_modules/${1}:${1}@"
-    }
-    function npm_remove_module_re () {
-      node -e '
-        fs = require("fs");
-        p = JSON.parse(fs.readFileSync("package.json", "utf8"));
-        r = RegExp(process.argv[1]);
-        for (k in p.devDependencies) {
-          if (r.test(k)) delete p.devDependencies[k];
-        }
-        fs.writeFileSync("package.json", JSON.stringify(p, null, 2) + "\n");
-      ' "$@"
-    }
-    function npm_use_module () {
-      node -e '
-        fs = require("fs");
-        p = JSON.parse(fs.readFileSync("package.json", "utf8"));
-        p.devDependencies[process.argv[1]] = process.argv[2];
-        fs.writeFileSync("package.json", JSON.stringify(p, null, 2) + "\n");
-      ' "$@"
-    }
-    function v () {
-      tr '.' '\n' <<< "${1}" \
-        | awk '{ printf "%03d", $0 }' \
-        | sed 's/^0*//'
-    }
-  # Configure npm
-  - |
-    # Skip updating shrinkwrap / lock
-    npm config set shrinkwrap false
-  # Setup Node.js version-specific dependencies
-  - |
-    # Configure eslint for linting
-    if node_version_lt '8.0'; then npm_remove_module_re '^eslint(-|$)'
-    fi
-  - |
-    # Configure mocha for testing
-    if   node_version_lt '4.0'; then npm_use_module 'mocha' '3.5.3'
-    elif node_version_lt '6.0'; then npm_use_module 'mocha' '5.2.0'
-    elif node_version_lt '8.0'; then npm_use_module 'mocha' '6.2.2'
-    fi
-  - |
-    # Configure nyc for testing
-    if   node_version_lt '4.0'; then npm_use_module 'nyc' '10.3.2'
-    elif node_version_lt '6.0'; then npm_use_module 'nyc' '11.9.0'
-    elif node_version_lt '8.0'; then npm_use_module 'nyc' '14.1.1'
-    fi
-  - |
-    # Configure supertest for http calls
-    if   node_version_lt '4.0'; then npm_use_module 'supertest' '2.0.0'
-    elif node_version_lt '6.0'; then npm_use_module 'supertest' '3.4.2'
-    fi
-  # Update Node.js modules
-  - |
-    # Prune and rebuild node_modules
-    if [[ -d node_modules ]]; then
-      npm prune
-      npm rebuild
-    fi
-script:
-  # Run test script, depending on nyc install
-  - |
-    if npm_module_installed 'nyc'; then npm run-script test-travis
-    else npm test
-    fi
-  # Run linting, depending on eslint install
-  - |
-    if npm_module_installed 'eslint'; then npm run-script lint
-    fi
-after_script:
-  # Upload coverage to coveralls if exists
-  - |
-    if [[ -d .nyc_output ]]; then
-      npm install --save-dev coveralls@2
-      nyc report --reporter=text-lcov | coveralls
-    fi
diff --git a/HISTORY.md b/HISTORY.md
index 55b18bd..438dfaa 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,3 +1,8 @@
+2.x
+===
+
+This incorporates all changes after 1.3.5 up to 1.3.6.
+
 2.0.0-beta.1 / 2020-03-29
 =========================
 
@@ -33,6 +38,12 @@ This incorporates all changes after 1.3.3 up to 1.3.5.
     - Remove `DEBUG_FD` environment variable support
     - Support 256 namespace colors
 
+1.3.6 / 2021-11-15
+==================
+
+  * Fix handling very large stacks of sync middleware
+  * deps: safe-buffer@5.2.1
+
 1.3.5 / 2020-03-24
 ==================
 
diff --git a/README.md b/README.md
index a498379..b105931 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![NPM Version][npm-image]][npm-url]
 [![NPM Downloads][downloads-image]][downloads-url]
 [![Node.js Version][node-version-image]][node-version-url]
-[![Build Status][travis-image]][travis-url]
+[![Build Status][ci-image]][ci-url]
 [![Test Coverage][coveralls-image]][coveralls-url]
 
 Simple middleware-style router
@@ -399,12 +399,12 @@ server.listen(8080)
 
 [MIT](LICENSE)
 
+[ci-image]: https://badgen.net/github/checks/pillarjs/router/master?label=ci
+[ci-url]: https://github.com/pillarjs/router/actions?query=workflow%3Aci
 [npm-image]: https://img.shields.io/npm/v/router.svg
 [npm-url]: https://npmjs.org/package/router
 [node-version-image]: https://img.shields.io/node/v/router.svg
 [node-version-url]: http://nodejs.org/download/
-[travis-image]: https://img.shields.io/travis/pillarjs/router/master.svg
-[travis-url]: https://travis-ci.org/pillarjs/router
 [coveralls-image]: https://img.shields.io/coveralls/pillarjs/router/master.svg
 [coveralls-url]: https://coveralls.io/r/pillarjs/router?branch=master
 [downloads-image]: https://img.shields.io/npm/dm/router.svg
diff --git a/index.js b/index.js
index 45495b3..6dbb540 100644
--- a/index.js
+++ b/index.js
@@ -155,6 +155,7 @@ Router.prototype.handle = function handle (req, res, callback) {
   var removed = ''
   var self = this
   var slashAdded = false
+  var sync = 0
   var paramcalled = {}
 
   // middleware and routes
@@ -210,6 +211,11 @@ Router.prototype.handle = function handle (req, res, callback) {
       return
     }
 
+    // max sync stack
+    if (++sync > 100) {
+      return setImmediate(next, err)
+    }
+
     // get pathname of request
     var path = getPathname(req)
 
@@ -329,6 +335,8 @@ Router.prototype.handle = function handle (req, res, callback) {
     } else {
       layer.handleRequest(req, res, next)
     }
+
+    sync = 0
   }
 }
 
diff --git a/lib/route.js b/lib/route.js
index 7656403..b89b8e3 100644
--- a/lib/route.js
+++ b/lib/route.js
@@ -23,6 +23,11 @@ var methods = require('methods')
 
 var slice = Array.prototype.slice
 
+/* istanbul ignore next */
+var defer = typeof setImmediate === 'function'
+  ? setImmediate
+  : function (fn) { process.nextTick(fn.bind.apply(fn, arguments)) }
+
 /**
  * Expose `Route`.
  */
@@ -93,6 +98,8 @@ Route.prototype._methods = function _methods () {
 Route.prototype.dispatch = function dispatch (req, res, done) {
   var idx = 0
   var stack = this.stack
+  var sync = 0
+
   if (stack.length === 0) {
     return done()
   }
@@ -122,6 +129,11 @@ Route.prototype.dispatch = function dispatch (req, res, done) {
       return done(err)
     }
 
+    // max sync stack
+    if (++sync > 100) {
+      return defer(next, err)
+    }
+
     var layer
     var match
 
@@ -141,6 +153,8 @@ Route.prototype.dispatch = function dispatch (req, res, done) {
     } else {
       layer.handleRequest(req, res, next)
     }
+
+    sync = 0
   }
 }
 
diff --git a/package.json b/package.json
index 9b6306c..fa25e86 100644
--- a/package.json
+++ b/package.json
@@ -18,18 +18,18 @@
   },
   "devDependencies": {
     "after": "0.8.2",
-    "eslint": "6.8.0",
+    "eslint": "7.32.0",
     "eslint-config-standard": "14.1.1",
-    "eslint-plugin-import": "2.20.1",
-    "eslint-plugin-markdown": "1.0.2",
-    "eslint-plugin-node": "11.0.0",
-    "eslint-plugin-promise": "4.2.1",
-    "eslint-plugin-standard": "4.0.1",
+    "eslint-plugin-import": "2.25.3",
+    "eslint-plugin-markdown": "2.2.1",
+    "eslint-plugin-node": "11.1.0",
+    "eslint-plugin-promise": "4.3.1",
+    "eslint-plugin-standard": "4.1.0",
     "finalhandler": "1.1.2",
-    "mocha": "7.1.1",
-    "nyc": "15.0.0",
-    "safe-buffer": "5.2.0",
-    "supertest": "4.0.2"
+    "mocha": "9.1.3",
+    "nyc": "15.1.0",
+    "safe-buffer": "5.2.1",
+    "supertest": "6.1.6"
   },
   "files": [
     "lib/",
@@ -42,10 +42,10 @@
     "node": ">= 0.10"
   },
   "scripts": {
-    "lint": "eslint --plugin markdown --ext js,md .",
+    "lint": "eslint .",
     "test": "mocha --reporter spec --bail --check-leaks test/",
+    "test-ci": "nyc --reporter=lcov --reporter=text npm test",
     "test-cov": "nyc --reporter=text npm test",
-    "test-travis": "nyc --reporter=html --reporter=text npm test",
     "version": "node scripts/version-history.js && git add HISTORY.md"
   }
 }
diff --git a/test/req.params.js b/test/req.params.js
index 334b805..4a0e01b 100644
--- a/test/req.params.js
+++ b/test/req.params.js
@@ -68,7 +68,7 @@ describe('req.params', function () {
   })
 
   describe('when "mergeParams: true"', function () {
-    it('should merge outsite object with params', function (done) {
+    it('should merge outside object with params', function (done) {
       var router = Router({ mergeParams: true })
       var server = createServer(function (req, res, next) {
         req.params = { foo: 'bar' }
@@ -87,7 +87,7 @@ describe('req.params', function () {
         .expect(200, '{"foo":"bar"}', done)
     })
 
-    it('should ignore non-object outsite object', function (done) {
+    it('should ignore non-object outside object', function (done) {
       var router = Router({ mergeParams: true })
       var server = createServer(function (req, res, next) {
         req.params = 42
@@ -126,7 +126,7 @@ describe('req.params', function () {
     })
 
     describe('with numeric properties in req.params', function () {
-      it('should merge numeric properies by offsetting', function (done) {
+      it('should merge numeric properties by offsetting', function (done) {
         var router = Router({ mergeParams: true })
         var server = createServer(function (req, res, next) {
           req.params = { 0: 'foo', 1: 'bar' }
diff --git a/test/route.js b/test/route.js
index 69dd5ac..ee3d6d7 100644
--- a/test/route.js
+++ b/test/route.js
@@ -107,6 +107,24 @@ describe('Router', function () {
         .expect(404, done)
     })
 
+    it('should not stack overflow with a large sync stack', function (done) {
+      this.timeout(5000) // long-running test
+
+      var router = new Router()
+      var route = router.route('/foo')
+      var server = createServer(router)
+
+      for (var i = 0; i < 6000; i++) {
+        route.all(function (req, res, next) { next() })
+      }
+
+      route.get(helloWorld)
+
+      request(server)
+        .get('/foo')
+        .expect(200, 'hello, world', done)
+    })
+
     describe('.all(...fn)', function () {
       it('should reject no arguments', function () {
         var router = new Router()
diff --git a/test/router.js b/test/router.js
index 74308f7..3b2a268 100644
--- a/test/router.js
+++ b/test/router.js
@@ -563,6 +563,23 @@ describe('Router', function () {
         .expect(404, done)
     })
 
+    it('should not stack overflow with a large sync stack', function (done) {
+      this.timeout(5000) // long-running test
+
+      var router = new Router()
+      var server = createServer(router)
+
+      for (var i = 0; i < 6000; i++) {
+        router.use(function (req, res, next) { next() })
+      }
+
+      router.use(helloWorld)
+
+      request(server)
+        .get('/')
+        .expect(200, 'hello, world', done)
+    })
+
     describe('error handling', function () {
       it('should invoke error function after next(err)', function (done) {
         var router = new Router()