diff --git a/.npmignore b/.npmignore
index 517ba0bd..03030ba5 100644
--- a/.npmignore
+++ b/.npmignore
@@ -42,6 +42,7 @@ lib/test/
 docs/
 /.idea/
 .vscode/
+bin/
 build/
 fixtures/
 coverage/
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 19c8044b..a701b9a5 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -72,16 +72,23 @@ jobs:
   - Linux
   - macOS
   - Windows
+  #condition: and(succeeded(), eq(variables['Build.SourceBranch'], 'refs/heads/master'))
   pool:
-    vmImage: 'xcode9-macos10.13'
+    vmImage: 'ubuntu-16.04'
   steps:
   - task: NodeTool@0
     inputs:
       versionSpec: '8.x'
     displayName: 'Install Node.js'
+  - task: geeklearningio.gl-vsts-tasks-yarn.yarn-installer-task.YarnInstaller@2
+    inputs:
+      versionSpec: "1.9.4"
+    displayName: 'Install Yarn'
   - script: |
       yarn
     displayName: 'Install dependencies and build'
   - script: |
-      echo 'success'
-    displayName: 'Test'
+      node ./bin/publish.js
+    env:
+      NPM_AUTH_TOKEN: $(NPM_AUTH_TOKEN)
+    displayName: 'Publish to npm'
diff --git a/bin/publish.js b/bin/publish.js
new file mode 100644
index 00000000..e7871155
--- /dev/null
+++ b/bin/publish.js
@@ -0,0 +1,48 @@
+/**
+ * Copyright (c) 2019 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+const cp = require('child_process');
+const fs = require('fs');
+const path = require('path');
+const packageJson = require('../package.json');
+
+// Setup auth
+fs.writeFileSync(`${process.env['HOME']}/.npmrc`, `//registry.npmjs.org/:_authToken=${process.env['NPM_AUTH_TOKEN']}`);
+
+// Get the version
+const tag = 'beta'
+const nextVersion = getNextVersion(tag);
+console.log(`Publishing version: ${nextVersion}`);
+
+// Set the version in package.json
+const packageJsonFile = path.resolve(__dirname, '..', 'package.json');
+let packageJsonRaw = fs.readFileSync(packageJsonFile).toString();
+packageJsonRaw = packageJsonRaw.replace(/("version": ")3.10.0(")/, `$1${nextVersion}$2`);
+fs.writeFileSync(packageJsonFile, packageJsonRaw);
+
+// Publish
+cp.spawnSync('npm', ['publish', '--tag', tag], {
+  stdio: 'inherit'
+});
+
+function getNextVersion(tag) {
+  if (!/^[0-9]+\.[0-9]+\.[0-9]+$/.exec(packageJson.version)) {
+    console.error('The package.json version must be of the form x.y.z');
+    process.exit(1);
+  }
+  const publishedVersions = getPublishedVersions(packageJson.version, tag);
+  if (publishedVersions.length === 0) {
+    return `${packageJson.version}-${tag}1`;
+  }
+  const latestPublishedVersion = publishedVersions.sort((a, b) => b.localeCompare(a))[0];
+  const latestTagVersion = parseInt(latestPublishedVersion.substr(latestPublishedVersion.search(/[0-9]+$/)), 10);
+  return `${packageJson.version}-${tag}${latestTagVersion + 1}`;
+}
+
+function getPublishedVersions(version, tag) {
+  const versionsProcess = cp.spawnSync('npm', ['view', 'xterm', 'versions', '--json']);
+  const versionsJson = JSON.parse(versionsProcess.stdout);
+  return versionsJson.filter(v => !v.search(new RegExp(`${version}-${tag}[0-9]+`)));
+}
diff --git a/package.json b/package.json
index 0d797f78..5ed3a4b8 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "xterm",
   "description": "Full xterm terminal, in your browser",
-  "version": "3.9.0",
+  "version": "3.10.0",
   "main": "lib/public/Terminal.js",
   "types": "typings/xterm.d.ts",
   "repository": "https://github.com/xtermjs/xterm.js",