diff --git a/.travis.yml b/.travis.yml
index ce9690a9c..b8c200dd2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ before_install:
 - npm install -g grunt-cli
 script:
 - grunt --stack travis
+- multi-nodejs-test/run-tests.sh 0.10 0.12 4 5 6 7 8 9 10 11
 email:
   on_failure: change
   on_success: never
diff --git a/Gruntfile.js b/Gruntfile.js
index 7542a7ffc..838e7b395 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -12,7 +12,8 @@ module.exports = function(grunt) {
         'bench/**/*.js',
         'tasks/**/*.js',
         'lib/**/!(*.min|parser).js',
-        'spec/**/!(*.amd|json2|require).js'
+        'spec/**/!(*.amd|json2|require).js',
+        'multi-nodejs-test/*.js'
       ]
     },
 
@@ -228,7 +229,7 @@ module.exports = function(grunt) {
   grunt.task.loadTasks('tasks');
 
   grunt.registerTask('bench', ['metrics']);
-  grunt.registerTask('sauce', [] /* process.env.SAUCE_USERNAME ? ['tests', 'connect', 'saucelabs-mocha'] : [] */);
+  grunt.registerTask('sauce', process.env.SAUCE_USERNAME ? ['tests', 'connect', 'saucelabs-mocha'] : []);
 
   grunt.registerTask('travis', process.env.PUBLISH ? ['default', 'sauce', 'metrics', 'publish:latest'] : ['default']);
 
diff --git a/bench/dist-size.js b/bench/dist-size.js
index 9176054d5..d0bd24892 100644
--- a/bench/dist-size.js
+++ b/bench/dist-size.js
@@ -1,4 +1,4 @@
-var async = require('async'),
+var async = require('neo-async'),
     fs = require('fs'),
     zlib = require('zlib');
 
diff --git a/components/bower.json b/components/bower.json
index af87b72af..ffd98e358 100644
--- a/components/bower.json
+++ b/components/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "handlebars",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "main": "handlebars.js",
   "license": "MIT",
   "dependencies": {}
diff --git a/components/handlebars.js.nuspec b/components/handlebars.js.nuspec
index a4740212a..e6a38c6f2 100644
--- a/components/handlebars.js.nuspec
+++ b/components/handlebars.js.nuspec
@@ -2,7 +2,7 @@
 <package>
 	<metadata>
 		<id>handlebars.js</id>
-		<version>4.1.0</version>
+		<version>4.1.1</version>
 		<authors>handlebars.js Authors</authors>
 		<licenseUrl>https://github.com/wycats/handlebars.js/blob/master/LICENSE</licenseUrl>
 		<projectUrl>https://github.com/wycats/handlebars.js/</projectUrl>
diff --git a/components/package.json b/components/package.json
index 7013be4a4..ced91e119 100644
--- a/components/package.json
+++ b/components/package.json
@@ -1,6 +1,6 @@
 {
   "name": "handlebars",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "license": "MIT",
   "jspm": {
     "main": "handlebars",
diff --git a/lib/handlebars/base.js b/lib/handlebars/base.js
index 22307b9da..a1278d1e5 100644
--- a/lib/handlebars/base.js
+++ b/lib/handlebars/base.js
@@ -4,7 +4,7 @@ import {registerDefaultHelpers} from './helpers';
 import {registerDefaultDecorators} from './decorators';
 import logger from './logger';
 
-export const VERSION = '4.1.0';
+export const VERSION = '4.1.1';
 export const COMPILER_REVISION = 7;
 
 export const REVISION_CHANGES = {
diff --git a/lib/handlebars/compiler/helpers.js b/lib/handlebars/compiler/helpers.js
index 432df877c..f26b4e15c 100644
--- a/lib/handlebars/compiler/helpers.js
+++ b/lib/handlebars/compiler/helpers.js
@@ -24,7 +24,7 @@ export function SourceLocation(source, locInfo) {
 
 export function id(token) {
   if (/^\[.*\]$/.test(token)) {
-    return token.substr(1, token.length - 2);
+    return token.substring(1, token.length - 1);
   } else {
     return token;
   }
diff --git a/lib/precompiler.js b/lib/precompiler.js
index ab3eb201d..ecf264eff 100644
--- a/lib/precompiler.js
+++ b/lib/precompiler.js
@@ -1,5 +1,5 @@
 /* eslint-disable no-console */
-import Async from 'async';
+import Async from 'neo-async';
 import fs from 'fs';
 import * as Handlebars from './handlebars';
 import {basename} from 'path';
diff --git a/multi-nodejs-test/.eslintrc.js b/multi-nodejs-test/.eslintrc.js
new file mode 100644
index 000000000..6d3592c7b
--- /dev/null
+++ b/multi-nodejs-test/.eslintrc.js
@@ -0,0 +1,114 @@
+module.exports = {
+  "extends": "eslint:recommended",
+  "globals": {
+    "self": false
+  },
+  "env": {
+    "node": true
+  },
+  "rules": {
+    // overrides eslint:recommended defaults
+    "no-sparse-arrays": "off",
+    "no-func-assign": "off",
+    "no-console": "off",
+    "no-debugger": "warn",
+    "no-unreachable": "warn",
+
+    // Possible Errors //
+    //-----------------//
+    "no-unsafe-negation": "error",
+
+
+    // Best Practices //
+    //----------------//
+    "curly": "error",
+    "default-case": "warn",
+    "dot-notation": ["error", { "allowKeywords": false }],
+    "guard-for-in": "warn",
+    "no-alert": "error",
+    "no-caller": "error",
+    "no-div-regex": "warn",
+    "no-eval": "error",
+    "no-extend-native": "error",
+    "no-extra-bind": "error",
+    "no-floating-decimal": "error",
+    "no-implied-eval": "error",
+    "no-iterator": "error",
+    "no-labels": "error",
+    "no-lone-blocks": "error",
+    "no-loop-func": "error",
+    "no-multi-spaces": "error",
+    "no-multi-str": "warn",
+    "no-global-assign": "error",
+    "no-new": "error",
+    "no-new-func": "error",
+    "no-new-wrappers": "error",
+    "no-octal-escape": "error",
+    "no-process-env": "error",
+    "no-proto": "error",
+    "no-return-assign": "error",
+    "no-script-url": "error",
+    "no-self-compare": "error",
+    "no-sequences": "error",
+    "no-throw-literal": "error",
+    "no-unused-expressions": "error",
+    "no-warning-comments": "warn",
+    "no-with": "error",
+    "radix": "error",
+    "wrap-iife": "error",
+
+
+    // Variables //
+    //-----------//
+    "no-catch-shadow": "error",
+    "no-label-var": "error",
+    "no-shadow-restricted-names": "error",
+    "no-undef-init": "error",
+    "no-use-before-define": ["error", "nofunc"],
+
+
+    // Stylistic Issues //
+    //------------------//
+    "comma-dangle": ["error", "never"],
+    "quote-props": ["error", "as-needed", { "keywords": true, "unnecessary": false }],
+    "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
+    "camelcase": "error",
+    "comma-spacing": ["error", { "before": false, "after": true }],
+    "comma-style": ["error", "last"],
+    "consistent-this": ["warn", "self"],
+    "eol-last": "error",
+    "func-style": ["error", "declaration"],
+    "key-spacing": ["error", {
+      "beforeColon": false,
+      "afterColon": true
+    }],
+    "new-cap": "error",
+    "new-parens": "error",
+    "no-array-constructor": "error",
+    "no-lonely-if": "error",
+    "no-mixed-spaces-and-tabs": "error",
+    "no-nested-ternary": "warn",
+    "no-new-object": "error",
+    "no-spaced-func": "error",
+    "no-trailing-spaces": "error",
+    "no-extra-parens": ["error", "functions"],
+    "quotes": ["error", "single", "avoid-escape"],
+    "semi": "error",
+    "semi-spacing": ["error", { "before": false, "after": true }],
+    "keyword-spacing": "error",
+    "space-before-blocks": ["error", "always"],
+    "space-before-function-paren": ["error", { "anonymous": "never", "named": "never" }],
+    "space-in-parens": ["error", "never"],
+    "space-infix-ops": "error",
+    "space-unary-ops": "error",
+    "spaced-comment": ["error", "always", { "markers": [","] }],
+    "wrap-regex": "warn",
+
+    // ECMAScript 6 //
+    //--------------//
+    "no-var": "off"
+  },
+  "parserOptions": {
+    "sourceType": "module"
+  }
+}
\ No newline at end of file
diff --git a/multi-nodejs-test/expected.txt b/multi-nodejs-test/expected.txt
new file mode 100644
index 000000000..19a4be2d7
--- /dev/null
+++ b/multi-nodejs-test/expected.txt
@@ -0,0 +1 @@
+Author: Yehuda
diff --git a/multi-nodejs-test/run-handlebars.js b/multi-nodejs-test/run-handlebars.js
new file mode 100755
index 000000000..58bc8d495
--- /dev/null
+++ b/multi-nodejs-test/run-handlebars.js
@@ -0,0 +1,13 @@
+// This test should run with node 0.10 as long as Handlebars has been compiled before
+var Handlebars = require('../');
+var fs = require('fs');
+
+console.log('Testing build Handlebars with Node version ' + process.version);
+var template = fs.readFileSync(require.resolve('./template.txt.hbs'), 'utf-8');
+var compiledOutput = Handlebars.compile(template)({author: 'Yehuda'}).trim();
+var expectedOutput = fs.readFileSync(require.resolve('./expected.txt'), 'utf-8').trim();
+
+if (compiledOutput !== expectedOutput) {
+    throw new Error('Compiled output (' + compiledOutput + ') did not match expected output (' + expectedOutput + ')');
+}
+console.log('Success');
diff --git a/multi-nodejs-test/run-tests.sh b/multi-nodejs-test/run-tests.sh
new file mode 100755
index 000000000..174a12ccb
--- /dev/null
+++ b/multi-nodejs-test/run-tests.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+cd "$( dirname "$( readlink -f "$0" )" )"
+[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
+
+# This script tests with precompiler and the built distribution with multiple NodeJS version.
+# The rest of the travis-build will only work with newer NodeJS versions, because the build
+# tools don't support older versions.
+# However, the built distribution should work with older NodeJS versions as well.
+# This test is simple by design. It merely ensures, that calling Handlebars does not fail with old versions.
+# It does (almost) not test for correctness, because that is already done in the mocha-tests.
+# And it does not use any NodeJS based testing framwork to make this part independent of the Node version.
+
+# A list of NodeJS versions is expected as cli-args
+echo "Handlebars should be able to run in various versions of NodeJS"
+for i in "$@" ; do
+    nvm install "$i"
+    nvm exec "$i" node ./run-handlebars.js >/dev/null || exit 1
+    nvm exec "$i" node ../bin/handlebars template.txt.hbs >/dev/null || exit 1
+    echo Success
+done
\ No newline at end of file
diff --git a/multi-nodejs-test/template.txt.hbs b/multi-nodejs-test/template.txt.hbs
new file mode 100644
index 000000000..61d4dd7fa
--- /dev/null
+++ b/multi-nodejs-test/template.txt.hbs
@@ -0,0 +1 @@
+Author: {{author}} 
diff --git a/package.json b/package.json
index de4efbf87..edf11b7c2 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "handlebars",
   "barename": "handlebars",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "description": "Handlebars provides the power necessary to let you build semantic templates effectively with no frustration",
   "homepage": "http://www.handlebarsjs.com/",
   "keywords": [
@@ -21,7 +21,7 @@
     "node": ">=0.4.7"
   },
   "dependencies": {
-    "async": "^2.5.0",
+    "neo-async": "^2.6.0",
     "optimist": "^0.6.1",
     "source-map": "^0.6.1"
   },
diff --git a/release-notes.md b/release-notes.md
index 5b54c5e73..10b6455de 100644
--- a/release-notes.md
+++ b/release-notes.md
@@ -2,7 +2,35 @@
 
 ## Development
 
-[Commits](https://github.com/wycats/handlebars.js/compare/v4.1.0...master)
+[Commits](https://github.com/wycats/handlebars.js/compare/v4.1.1...master)
+
+## v4.1.1 - March 16th, 2019
+Bugfixes:
+- fix: add "runtime.d.ts" to allow "require('handlebars/runtime')" in TypeScript - 5cedd62
+
+Refactorings:
+- replace "async" with "neo-async" - 048f2ce
+- use "substring"-function instead of "substr" - 445ae12
+
+Compatibility notes:
+- This is a bugfix release. There are no breaking change and no new features.
+
+
+[Commits](https://github.com/wycats/handlebars.js/compare/v4.1.1...v4.1.1)
+
+## v4.1.1 - March 16th, 2019
+Bugfixes:
+- fix: add "runtime.d.ts" to allow "require('handlebars/runtime')" in TypeScript - 5cedd62
+
+Refactorings:
+- replace "async" with "neo-async" - 048f2ce
+- use "substring"-function instead of "substr" - 445ae12
+
+Compatibility notes:
+- This is a bugfix release. There are no breaking change and no new features.
+
+
+[Commits](https://github.com/wycats/handlebars.js/compare/v4.1.0...v4.1.1)
 
 ## v4.1.0 - February 7th, 2019
 New Features
diff --git a/runtime.d.ts b/runtime.d.ts
new file mode 100644
index 000000000..0d5105eb7
--- /dev/null
+++ b/runtime.d.ts
@@ -0,0 +1,5 @@
+import Handlebars = require('handlebars')
+
+declare module "handlebars/runtime" {
+   
+}
\ No newline at end of file
diff --git a/spec/security.js b/spec/security.js
index 45b96c34b..12b96e629 100644
--- a/spec/security.js
+++ b/spec/security.js
@@ -11,11 +11,16 @@ describe('security issues', function() {
         });
 
         it('should allow prototype properties that are not constructors', function() {
-            class TestClass {
-                get abc() {
+            function TestClass() {
+            }
+
+            Object.defineProperty(TestClass.prototype, 'abc', {
+                get: function() {
                     return 'xyz';
                 }
-            }
+
+            });
+
             shouldCompileTo('{{#with this as |obj|}}{{obj.abc}}{{/with}}',
                 new TestClass(), 'xyz');
         });
diff --git a/src/handlebars.l b/src/handlebars.l
index e9de1029b..90acffec0 100644
--- a/src/handlebars.l
+++ b/src/handlebars.l
@@ -4,7 +4,7 @@
 %{
 
 function strip(start, end) {
-  return yytext = yytext.substr(start, yyleng-end);
+  return yytext = yytext.substring(start, yyleng - end + start);
 }
 
 %}
@@ -59,7 +59,7 @@ ID    [^\s!"#%-,\.\/;->@\[-\^`\{-~]+/{LOOKAHEAD}
                                   if (this.conditionStack[this.conditionStack.length-1] === 'raw') {
                                     return 'CONTENT';
                                   } else {
-                                    yytext = yytext.substr(5, yyleng-9);
+                                    strip(5, 9);
                                     return 'END_RAW_BLOCK';
                                   }
                                  }
diff --git a/tasks/metrics.js b/tasks/metrics.js
index b04967dd0..a1fa5c95a 100644
--- a/tasks/metrics.js
+++ b/tasks/metrics.js
@@ -1,5 +1,5 @@
 var _ = require('underscore'),
-    async = require('async'),
+    async = require('neo-async'),
     metrics = require('../bench');
 
 module.exports = function(grunt) {
diff --git a/tasks/publish.js b/tasks/publish.js
index 38039c6d4..c3729596b 100644
--- a/tasks/publish.js
+++ b/tasks/publish.js
@@ -1,5 +1,5 @@
 var _ = require('underscore'),
-    async = require('async'),
+    async = require('neo-async'),
     AWS = require('aws-sdk'),
     git = require('./util/git'),
     semver = require('semver');
@@ -66,7 +66,7 @@ module.exports = function(grunt) {
     var s3 = new AWS.S3(),
         bucket = process.env.S3_BUCKET_NAME;
 
-    async.forEach(_.keys(files), function(file, callback) {
+    async.each(_.keys(files), function(file, callback) {
         var params = {Bucket: bucket, Key: file, Body: grunt.file.read(files[file])};
         s3.putObject(params, function(err) {
           if (err) {
diff --git a/tasks/version.js b/tasks/version.js
index 3fe3efab1..05f703419 100644
--- a/tasks/version.js
+++ b/tasks/version.js
@@ -1,4 +1,4 @@
-var async = require('async'),
+var async = require('neo-async'),
     git = require('./util/git'),
     semver = require('semver');