diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 4046195b..2710fc4c 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1,2 +1,2 @@
 # Code owners for Polymer
-* @sorvell @kevinpschaaf @TimvdLippe @azakus
\ No newline at end of file
+* @sorvell @kevinpschaaf @azakus
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c45488a2..144757fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,36 @@
 # Change Log
 
+## [v3.3.1](https://github.com/Polymer/polymer/tree/v3.3.1) (2019-11-08)
+- [ci skip] bump to 3.3.1 ([commit](https://github.com/Polymer/polymer/commit/11f1f139))
+
+- Remove TimvdLippe from CODEOWNERS ([commit](https://github.com/Polymer/polymer/commit/b99c2997))
+
+- Add node field to PolymerDomApi ([commit](https://github.com/Polymer/polymer/commit/15747c83))
+
+- Improve types for the template field on Polymer elements. (#5596) ([commit](https://github.com/Polymer/polymer/commit/4274bcec))
+
+- Add module field ([commit](https://github.com/Polymer/polymer/commit/9a4d4d9a))
+
+- Wrap other `hasOwnProperty` checks in `JSCompiler_renameProperty`. ([commit](https://github.com/Polymer/polymer/commit/0541b21a))
+
+- Wrap `hasOwnProperty` checks for `__hasRegisterFinished` in `JSCompiler_renameProperty()`. ([commit](https://github.com/Polymer/polymer/commit/9e90fd2e))
+
+- Fix typing error in fixPlaceholder ([commit](https://github.com/Polymer/polymer/commit/f050ce9e))
+
+- Fix up comments based on feedback ([commit](https://github.com/Polymer/polymer/commit/ab49f51a))
+
+- Workaround bindings to textarea.placeholder in IE ([commit](https://github.com/Polymer/polymer/commit/61767da2))
+
+- Add additional externs (#5575) ([commit](https://github.com/Polymer/polymer/commit/69ee4688))
+
+- Make Closure compiler happier about ShadyDOM access ([commit](https://github.com/Polymer/polymer/commit/46ee2aec))
+
+- Remove other double import (#5565) ([commit](https://github.com/Polymer/polymer/commit/0d2c2e5d))
+
+- Only use CONST_CASE for constants. (#5564) ([commit](https://github.com/Polymer/polymer/commit/54f8b47f))
+
+- [skip ci] update changelog ([commit](https://github.com/Polymer/polymer/commit/ac12b3bc))
+
 ## [v3.3.0](https://github.com/Polymer/polymer/tree/v3.3.0) (2019-06-24)
 - [ci skip] Update version to 3.3.0 ([commit](https://github.com/Polymer/polymer/commit/dd7c0d70))
 
diff --git a/externs/polymer-dom-api-externs.js b/externs/polymer-dom-api-externs.js
index 9b52e339..2076d03f 100644
--- a/externs/polymer-dom-api-externs.js
+++ b/externs/polymer-dom-api-externs.js
@@ -14,7 +14,7 @@
  *
  * @interface
  */
-var PolymerDomApi = function() {};
+let PolymerDomApi = function() {};
 
 /**
  * @param {?Node} node
@@ -103,6 +103,9 @@ PolymerDomApi.prototype.getDestinationInsertionPoints = function() {};
 /** @return {?Node} */
 PolymerDomApi.prototype.getOwnerRoot = function() {};
 
+/** @type {!Node} */
+PolymerDomApi.prototype.node;
+
 /**
  * @param {string} attribute
  * @param {string} value
diff --git a/externs/polymer-externs.js b/externs/polymer-externs.js
index ef4a6a31..f49bf21e 100644
--- a/externs/polymer-externs.js
+++ b/externs/polymer-externs.js
@@ -41,7 +41,7 @@ PolymerInit.prototype.extends;
 PolymerInit.prototype.properties;
 /** @type {(!Array<string> | undefined)} */
 PolymerInit.prototype.observers;
-/** @type {(!HTMLTemplateElement | string | undefined)} */
+/** @type {(!HTMLTemplateElement | string | undefined | null)} */
 PolymerInit.prototype.template;
 /** @type {(!Object<string, *> | undefined)} */
 PolymerInit.prototype.hostAttributes;
@@ -60,7 +60,7 @@ PolymerElementConstructor.extends;
 PolymerElementConstructor.properties;
 /** @type {(!Array<string> | undefined)} */
 PolymerElementConstructor.observers;
-/** @type {(!HTMLTemplateElement | string | undefined)} */
+/** @type {(!HTMLTemplateElement | string | undefined | null)} */
 PolymerElementConstructor.template;
 
 /** @interface */
@@ -174,7 +174,7 @@ var PolymerElement = function() {};
 PolymerElement.is;
 /**
  * The template to stamp when creating this element type.
- * @type {!HTMLTemplateElement|undefined}
+ * @type {!HTMLTemplateElement|undefined|null}
  */
 PolymerElement.template;
 /**
diff --git a/lib/elements/dom-bind.js b/lib/elements/dom-bind.js
index 33e7293b..e8e4a905 100644
--- a/lib/elements/dom-bind.js
+++ b/lib/elements/dom-bind.js
@@ -115,7 +115,7 @@ export class DomBind extends domBindBase {
   render() {
     let template;
     if (!this.__children) {
-      template = /** @type {HTMLTemplateElement} */(template || this.querySelector('template'));
+      template = /** @type {?HTMLTemplateElement} */(template || this.querySelector('template'));
       if (!template) {
         // Wait until childList changes and template should be there by then
         let observer = new MutationObserver(() => {
diff --git a/lib/legacy/polymer.dom.js b/lib/legacy/polymer.dom.js
index ff4fac88..22b863e0 100644
--- a/lib/legacy/polymer.dom.js
+++ b/lib/legacy/polymer.dom.js
@@ -45,7 +45,7 @@ export const matchesSelector = function(node, selector) {
 class DomApiNative {
 
   /**
-   * @param {Node} node Node for which to create a Polymer.dom helper object.
+   * @param {!Node} node Node for which to create a Polymer.dom helper object.
    */
   constructor(node) {
     if (window['ShadyDOM'] && window['ShadyDOM']['inUse']) {
diff --git a/lib/mixins/element-mixin.js b/lib/mixins/element-mixin.js
index b9a7c864..af201174 100644
--- a/lib/mixins/element-mixin.js
+++ b/lib/mixins/element-mixin.js
@@ -24,7 +24,7 @@ import { wrap } from '../utils/wrap.js';
  * Current Polymer version in Semver notation.
  * @type {string} Semver notation of the current version of Polymer.
  */
-export const version = '3.3.0';
+export const version = '3.3.1';
 
 export const builtCSS = window.ShadyCSS && window.ShadyCSS['cssBuild'];
 
diff --git a/package-lock.json b/package-lock.json
index 566c3821..b40ee588 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@polymer/polymer",
-  "version": "3.3.0",
+  "version": "3.3.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index a30c075a..851ed99d 100644
--- a/package.json
+++ b/package.json
@@ -1,8 +1,9 @@
 {
   "name": "@polymer/polymer",
-  "version": "3.3.0",
+  "version": "3.3.1",
   "description": "The Polymer library makes it easy to create your own web components. Give your element some markup and properties, and then use it on a site. Polymer provides features like dynamic templates and data binding to reduce the amount of boilerplate you need to write",
   "main": "polymer-element.js",
+  "module": "polymer-element.js",
   "directories": {
     "doc": "docs",
     "test": "test"