diff --git a/CHANGELOG.md b/CHANGELOG.md
index b4680f6719..ba8d68f404 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,30 @@
-# [4.2.0](https://github.com/ionic-team/ionic/compare/v4.1.2...v4.2.0) (2019-04-03)
+# [4.3.0 Lithium](https://github.com/ionic-team/ionic/compare/v4.2.0...v4.3.0) (2019-04-17)
+
+
+### Bug Fixes
+
+* **action-sheet:** default buttons to empty array ([9e63947](https://github.com/ionic-team/ionic/commit/9e63947))
+* **angular:** back button correctly goes back to proper tab ([#18005](https://github.com/ionic-team/ionic/issues/18005)) ([52e5a8d](https://github.com/ionic-team/ionic/commit/52e5a8d)), closes [#17278](https://github.com/ionic-team/ionic/issues/17278) [#15216](https://github.com/ionic-team/ionic/issues/15216)
+* **components:** add mode classes to components for use in shadow elements ([#17838](https://github.com/ionic-team/ionic/issues/17838)) ([e5c8c10](https://github.com/ionic-team/ionic/commit/e5c8c10)), closes [#17608](https://github.com/ionic-team/ionic/issues/17608)
+* **datetime:** date strings no longer revert to previous day ([#18018](https://github.com/ionic-team/ionic/issues/18018)) ([cc60b60](https://github.com/ionic-team/ionic/commit/cc60b60)), closes [#17977](https://github.com/ionic-team/ionic/issues/17977)
+* **input:** prevent input from losing focus when tapping clear button ([#18004](https://github.com/ionic-team/ionic/issues/18004)) ([29bb4fc](https://github.com/ionic-team/ionic/commit/29bb4fc)), closes [#18002](https://github.com/ionic-team/ionic/issues/18002)
+* **item:** use the correct input highlight for an inset line item ([#18052](https://github.com/ionic-team/ionic/issues/18052)) ([72be80c](https://github.com/ionic-team/ionic/commit/72be80c)), closes [#18051](https://github.com/ionic-team/ionic/issues/18051)
+* **item-sliding:** hide closed side options while dragging side options open ([#17986](https://github.com/ionic-team/ionic/issues/17986)) ([f13722c](https://github.com/ionic-team/ionic/commit/f13722c)), closes [#17822](https://github.com/ionic-team/ionic/issues/17822)
+* **slides:** allow zoom to work ([18b347b](https://github.com/ionic-team/ionic/commit/18b347b)), closes [#17981](https://github.com/ionic-team/ionic/issues/17981)
+* **slides:** expose interface to provide custom animations ([#17959](https://github.com/ionic-team/ionic/issues/17959)) ([4474974](https://github.com/ionic-team/ionic/commit/4474974)), closes [#16616](https://github.com/ionic-team/ionic/issues/16616)
+* **textarea:** float label when a value is changed async ([#18024](https://github.com/ionic-team/ionic/issues/18024)) ([494991e](https://github.com/ionic-team/ionic/commit/494991e)), closes [#17555](https://github.com/ionic-team/ionic/issues/17555) [#17559](https://github.com/ionic-team/ionic/issues/17559)
+* **textarea:** update label alignment for inputs and textareas ([#18042](https://github.com/ionic-team/ionic/issues/18042)) ([38ae362](https://github.com/ionic-team/ionic/commit/38ae362)), closes [#16187](https://github.com/ionic-team/ionic/issues/16187)
+* **vue:** use direction type from core ([#17901](https://github.com/ionic-team/ionic/issues/17901)) ([fa13173](https://github.com/ionic-team/ionic/commit/fa13173))
+
+
+### Features
+
+* **toast:** add header and additional custom toast buttons ([#17147](https://github.com/ionic-team/ionic/issues/17147)) ([6e1a8f1](https://github.com/ionic-team/ionic/commit/6e1a8f1)), closes [#16791](https://github.com/ionic-team/ionic/issues/16791) [#16237](https://github.com/ionic-team/ionic/issues/16237) [#17611](https://github.com/ionic-team/ionic/issues/17611)
+* **toast:** add variables to change position start/end of toast ([#17961](https://github.com/ionic-team/ionic/issues/17961)) ([07e739a](https://github.com/ionic-team/ionic/commit/07e739a)), closes [#17854](https://github.com/ionic-team/ionic/issues/17854)
+
+
+
+# [4.2.0 Helium](https://github.com/ionic-team/ionic/compare/v4.1.2...v4.2.0) (2019-04-03)
 
 
 ### Bug Fixes
diff --git a/angular/package.json b/angular/package.json
index 9e1eaff243..0b9598d344 100644
--- a/angular/package.json
+++ b/angular/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ionic/angular",
-  "version": "4.2.0",
+  "version": "4.3.0",
   "description": "Angular specific wrappers for @ionic/core",
   "keywords": [
     "ionic",
@@ -45,7 +45,7 @@
     "css/"
   ],
   "dependencies": {
-    "@ionic/core": "4.2.0",
+    "@ionic/core": "4.3.0",
     "tslib": "^1.9.3"
   },
   "peerDependencies": {
diff --git a/core/README.md b/core/README.md
index 1e3ced7668..1441ec6e5f 100644
--- a/core/README.md
+++ b/core/README.md
@@ -23,8 +23,8 @@ The Ionic Core package contains the Web Components that make up the reusable UI
 Easiest way to start using Ionic Core is by adding a script tag to the CDN:
 
 ```html
-<link href="https://unpkg.com/@ionic/core@4.2.0/css/ionic.bundle.css" rel="stylesheet">
-<script src="https://unpkg.com/@ionic/core@4.2.0/dist/ionic.js"></script>
+<link href="https://unpkg.com/@ionic/core@4.3.0/css/ionic.bundle.css" rel="stylesheet">
+<script src="https://unpkg.com/@ionic/core@4.3.0/dist/ionic.js"></script>
 ```
 
 Any Ionic component added to the webpage will automatically load. This includes writing the component tag directly in HTML, or using JavaScript such as `document.createElement('ion-toggle')`.
diff --git a/core/api.txt b/core/api.txt
index fa25ac3c32..d56fd0ed5a 100644
--- a/core/api.txt
+++ b/core/api.txt
@@ -7,7 +7,7 @@ ion-action-sheet-controller,method,getTop,getTop() => Promise<HTMLIonActionSheet
 ion-action-sheet,scoped
 ion-action-sheet,prop,animated,boolean,true,false,false
 ion-action-sheet,prop,backdropDismiss,boolean,true,false,false
-ion-action-sheet,prop,buttons,(string | ActionSheetButton)[],undefined,true,false
+ion-action-sheet,prop,buttons,(string | ActionSheetButton)[],[],false,false
 ion-action-sheet,prop,cssClass,string | string[] | undefined,undefined,false,false
 ion-action-sheet,prop,enterAnimation,((Animation: Animation, baseEl: any, opts?: any) => Promise<Animation>) | undefined,undefined,false,false
 ion-action-sheet,prop,header,string | undefined,undefined,false,false
diff --git a/core/package.json b/core/package.json
index d1dc6a2490..a9c5949253 100644
--- a/core/package.json
+++ b/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ionic/core",
-  "version": "4.2.0",
+  "version": "4.3.0",
   "description": "Base components for Ionic",
   "keywords": [
     "ionic",
diff --git a/core/src/components.d.ts b/core/src/components.d.ts
index 89660ce0bb..7a1b044b4c 100644
--- a/core/src/components.d.ts
+++ b/core/src/components.d.ts
@@ -176,7 +176,7 @@ export namespace Components {
     /**
     * An array of buttons for the action sheet.
     */
-    'buttons': (ActionSheetButton | string)[];
+    'buttons'?: (ActionSheetButton | string)[];
     /**
     * Additional classes to apply for custom CSS. If multiple classes are provided they should be separated by spaces.
     */
diff --git a/core/src/components/action-sheet/action-sheet.tsx b/core/src/components/action-sheet/action-sheet.tsx
index bb90ea59c4..303ffb8e4b 100644
--- a/core/src/components/action-sheet/action-sheet.tsx
+++ b/core/src/components/action-sheet/action-sheet.tsx
@@ -51,7 +51,7 @@ export class ActionSheet implements ComponentInterface, OverlayInterface {
   /**
    * An array of buttons for the action sheet.
    */
-  @Prop() buttons!: (ActionSheetButton | string)[];
+  @Prop() buttons: (ActionSheetButton | string)[] = [];
 
   /**
    * Additional classes to apply for custom CSS. If multiple classes are
diff --git a/core/src/components/action-sheet/readme.md b/core/src/components/action-sheet/readme.md
index 7e107d75f0..2920b496db 100644
--- a/core/src/components/action-sheet/readme.md
+++ b/core/src/components/action-sheet/readme.md
@@ -257,19 +257,19 @@ export default {
 
 ## Properties
 
-| Property               | Attribute          | Description                                                                                                                     | Type                                                                                   | Default     |
-| ---------------------- | ------------------ | ------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- | ----------- |
-| `animated`             | `animated`         | If `true`, the action sheet will animate.                                                                                       | `boolean`                                                                              | `true`      |
-| `backdropDismiss`      | `backdrop-dismiss` | If `true`, the action sheet will be dismissed when the backdrop is clicked.                                                     | `boolean`                                                                              | `true`      |
-| `buttons` _(required)_ | --                 | An array of buttons for the action sheet.                                                                                       | `(string \| ActionSheetButton)[]`                                                      | `undefined` |
-| `cssClass`             | `css-class`        | Additional classes to apply for custom CSS. If multiple classes are provided they should be separated by spaces.                | `string \| string[] \| undefined`                                                      | `undefined` |
-| `enterAnimation`       | --                 | Animation to use when the action sheet is presented.                                                                            | `((Animation: Animation, baseEl: any, opts?: any) => Promise<Animation>) \| undefined` | `undefined` |
-| `header`               | `header`           | Title for the action sheet.                                                                                                     | `string \| undefined`                                                                  | `undefined` |
-| `keyboardClose`        | `keyboard-close`   | If `true`, the keyboard will be automatically dismissed when the overlay is presented.                                          | `boolean`                                                                              | `true`      |
-| `leaveAnimation`       | --                 | Animation to use when the action sheet is dismissed.                                                                            | `((Animation: Animation, baseEl: any, opts?: any) => Promise<Animation>) \| undefined` | `undefined` |
-| `mode`                 | `mode`             | The mode determines which platform styles to use.                                                                               | `"ios" \| "md"`                                                                        | `undefined` |
-| `subHeader`            | `sub-header`       | Subtitle for the action sheet.                                                                                                  | `string \| undefined`                                                                  | `undefined` |
-| `translucent`          | `translucent`      | If `true`, the action sheet will be translucent. Only applies when the mode is `"ios"` and the device supports backdrop-filter. | `boolean`                                                                              | `false`     |
+| Property          | Attribute          | Description                                                                                                                     | Type                                                                                   | Default     |
+| ----------------- | ------------------ | ------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------- | ----------- |
+| `animated`        | `animated`         | If `true`, the action sheet will animate.                                                                                       | `boolean`                                                                              | `true`      |
+| `backdropDismiss` | `backdrop-dismiss` | If `true`, the action sheet will be dismissed when the backdrop is clicked.                                                     | `boolean`                                                                              | `true`      |
+| `buttons`         | --                 | An array of buttons for the action sheet.                                                                                       | `(string \| ActionSheetButton)[]`                                                      | `[]`        |
+| `cssClass`        | `css-class`        | Additional classes to apply for custom CSS. If multiple classes are provided they should be separated by spaces.                | `string \| string[] \| undefined`                                                      | `undefined` |
+| `enterAnimation`  | --                 | Animation to use when the action sheet is presented.                                                                            | `((Animation: Animation, baseEl: any, opts?: any) => Promise<Animation>) \| undefined` | `undefined` |
+| `header`          | `header`           | Title for the action sheet.                                                                                                     | `string \| undefined`                                                                  | `undefined` |
+| `keyboardClose`   | `keyboard-close`   | If `true`, the keyboard will be automatically dismissed when the overlay is presented.                                          | `boolean`                                                                              | `true`      |
+| `leaveAnimation`  | --                 | Animation to use when the action sheet is dismissed.                                                                            | `((Animation: Animation, baseEl: any, opts?: any) => Promise<Animation>) \| undefined` | `undefined` |
+| `mode`            | `mode`             | The mode determines which platform styles to use.                                                                               | `"ios" \| "md"`                                                                        | `undefined` |
+| `subHeader`       | `sub-header`       | Subtitle for the action sheet.                                                                                                  | `string \| undefined`                                                                  | `undefined` |
+| `translucent`     | `translucent`      | If `true`, the action sheet will be translucent. Only applies when the mode is `"ios"` and the device supports backdrop-filter. | `boolean`                                                                              | `false`     |
 
 
 ## Events
diff --git a/core/src/components/toast/test/basic/index.html b/core/src/components/toast/test/basic/index.html
index 4005f360d1..23cb2de7b3 100644
--- a/core/src/components/toast/test/basic/index.html
+++ b/core/src/components/toast/test/basic/index.html
@@ -157,11 +157,6 @@
   </script>
 
   <style>
-    :root {
-      --ion-safe-area-top: 20px;
-      --ion-safe-area-bottom: 40px;
-    }
-
     .my-custom-class {
       --border-radius: 20px;
       --border-width: 5px;
diff --git a/core/src/components/toast/test/test.utils.ts b/core/src/components/toast/test/test.utils.ts
index 4981153247..b7df07e3a3 100644
--- a/core/src/components/toast/test/test.utils.ts
+++ b/core/src/components/toast/test/test.utils.ts
@@ -16,10 +16,12 @@ export async function testToast(
 
     const screenshotCompares = [];
 
-    const button = await page.find(selector);
-    await button.click();
+    await page.click(selector);
+    await page.waitForSelector(selector);
 
     let toast = await page.find('ion-toast');
+
+    expect(toast).not.toBe(null);
     await toast.waitForVisible();
 
     screenshotCompares.push(await page.compareScreenshot());
@@ -30,7 +32,7 @@ export async function testToast(
     screenshotCompares.push(await page.compareScreenshot('dismiss'));
 
     toast = await page.find('ion-toast');
-    expect(toast).toBeNull();
+    expect(toast).toBe(null);
 
     for (const screenshotCompare of screenshotCompares) {
       expect(screenshotCompare).toMatchScreenshot();
diff --git a/core/src/utils/test/modes/index.html b/core/src/utils/test/modes/index.html
index b9262540e3..7637fcfb5e 100644
--- a/core/src/utils/test/modes/index.html
+++ b/core/src/utils/test/modes/index.html
@@ -113,6 +113,7 @@
   <script>
     async function load() {
       const actionSheet = document.querySelector('ion-action-sheet');
+      await actionSheet.componentOnReady();
 
       actionSheet.buttons = [{
         text: 'Delete',
@@ -136,6 +137,8 @@
         }
       }];
 
+      await actionSheet.present();
+
       const picker = document.querySelector('ion-picker');
       await picker.componentOnReady();
 
diff --git a/docs/package.json b/docs/package.json
index fe3e4b01c0..014e091dfd 100644
--- a/docs/package.json
+++ b/docs/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ionic/docs",
-  "version": "4.2.0",
+  "version": "4.3.0",
   "description": "Pre-packaged API documentation for the Ionic docs.",
   "main": "core.json",
   "files": [