diff --git a/packages/core/data/observable/index.d.ts b/packages/core/data/observable/index.d.ts
index a968f51fd..086aedaf8 100644
--- a/packages/core/data/observable/index.d.ts
+++ b/packages/core/data/observable/index.d.ts
@@ -78,7 +78,7 @@ export class Observable {
 	/**
 	 * String value used when hooking to propertyChange event.
 	 */
-	public static propertyChangeEvent: string;
+	static propertyChangeEvent: string;
 
 	/**
 	 * A basic method signature to hook an event listener (shortcut alias to the addEventListener method).
@@ -88,6 +88,8 @@ export class Observable {
 	 */
 	on(eventNames: string, callback: (data: EventData) => void, thisArg?: any);
 
+	static on(eventName: string, callback: any, thisArg?: any): void;
+
 	/**
 	 * Raised when a propertyChange occurs.
 	 */
@@ -101,11 +103,15 @@ export class Observable {
 	 */
 	once(event: string, callback: (data: EventData) => void, thisArg?: any);
 
+	static once(eventName: string, callback: any, thisArg?: any): void;
+
 	/**
 	 * Shortcut alias to the removeEventListener method.
 	 */
 	off(eventNames: string, callback?: any, thisArg?: any);
 
+	static off(eventName: string, callback?: any, thisArg?: any): void;
+
 	/**
 	 * Adds a listener for the specified event name.
 	 * @param eventNames Comma delimited names of the events to attach the listener to.
@@ -114,6 +120,8 @@ export class Observable {
 	 */
 	addEventListener(eventNames: string, callback: (data: EventData) => void, thisArg?: any);
 
+	static addEventListener(eventName: string, callback: any, thisArg?: any): void;
+
 	/**
 	 * Removes listener(s) for the specified event name.
 	 * @param eventNames Comma delimited names of the events the specified listener is associated with.
@@ -122,6 +130,8 @@ export class Observable {
 	 */
 	removeEventListener(eventNames: string, callback?: any, thisArg?: any);
 
+	static removeEventListener(eventName: string, callback?: any, thisArg?: any): void;
+
 	/**
 	 * Updates the specified property with the provided value.
 	 */
diff --git a/packages/core/index.d.ts b/packages/core/index.d.ts
index 693f6a9d1..06ee8b097 100644
--- a/packages/core/index.d.ts
+++ b/packages/core/index.d.ts
@@ -101,12 +101,13 @@ export type { InstrumentationMode, TimerInfo } from './profiling';
 export { encoding } from './text';
 export * from './trace';
 export * from './ui';
-import { GC, isFontIconURI, isDataURI, isFileOrResourcePath, executeOnMainThread, mainThreadify, isMainThread, dispatchToMainThread, releaseNativeObject, getModuleName, openFile, openUrl, isRealDevice, layout, ad as androidUtils, iOSNativeHelper as iosUtils, Source, escapeRegexSymbols, convertString, dismissSoftInput } from './utils';
+import { GC, isFontIconURI, isDataURI, isFileOrResourcePath, executeOnMainThread, mainThreadify, isMainThread, dispatchToMainThread, releaseNativeObject, getModuleName, openFile, openUrl, isRealDevice, layout, ad as androidUtils, iOSNativeHelper as iosUtils, Source, escapeRegexSymbols, convertString, dismissSoftInput, queueMacrotask } from './utils';
 import { ClassInfo, getClass, getBaseClasses, getClassInfo, isBoolean, isDefined, isFunction, isNullOrUndefined, isNumber, isObject, isString, isUndefined, toUIString, verifyCallback } from './utils/types';
 export declare const Utils: {
 	GC: typeof GC;
 	RESOURCE_PREFIX: string;
 	FILE_PREFIX: string;
+	queueMacrotask: typeof queueMacrotask;
 	isFontIconURI: typeof isFontIconURI;
 	isDataURI: typeof isDataURI;
 	isFileOrResourcePath: typeof isFileOrResourcePath;