diff --git a/src/scripts/AutoAlign.js b/src/scripts/AutoAlign.tsx
similarity index 78%
rename from src/scripts/AutoAlign.js
rename to src/scripts/AutoAlign.tsx
index 9885d26d4..3903cd587 100644
--- a/src/scripts/AutoAlign.js
+++ b/src/scripts/AutoAlign.tsx
@@ -1,28 +1,36 @@
-import React from 'react';
+import React, { ComponentType } from 'react';
 import PropTypes from 'prop-types';
 import classnames from 'classnames';
 import RelativePortal from 'react-relative-portal';
+import { ComponentSettingsContext } from './ComponentSettings';
 
-function delay(ms) {
+function delay(ms: number) {
   return new Promise((resolve) => {
     setTimeout(resolve, ms);
   });
 }
 
-function getViewportRect() {
+function getViewportRect(): Rect {
   const { innerHeight: height = Infinity, innerWidth: width = Infinity } =
     window || {};
   return { top: 0, left: 0, width, height };
 }
 
-function getCenterPoint(rect) {
+type Rect = {
+  top: number;
+  left: number;
+  width: number;
+  height: number;
+};
+
+function getCenterPoint(rect: Rect) {
   return {
     x: rect.left + 0.5 * rect.width,
     y: rect.top + 0.5 * rect.height,
   };
 }
 
-function getPreferAlignment(rect) {
+function getPreferAlignment(rect: Rect) {
   const { x: rx, y: ry } = getCenterPoint(rect);
   const { x: vx, y: vy } = getCenterPoint(getViewportRect());
   return {
@@ -31,7 +39,12 @@ function getPreferAlignment(rect) {
   };
 }
 
-function calcAlignmentRect(target, rect, vertAlign, horizAlign) {
+function calcAlignmentRect(
+  target: Rect,
+  rect: { width: number; height: number },
+  vertAlign: string,
+  horizAlign: string
+) {
   return {
     ...rect,
     top:
@@ -53,7 +66,7 @@ function calcAlignmentRect(target, rect, vertAlign, horizAlign) {
   };
 }
 
-function hasViewportIntersection({ top, left, width, height }) {
+function hasViewportIntersection({ top, left, width, height }: Rect) {
   const { width: viewportWidth, height: viewportHeight } = getViewportRect();
   return (
     top < 0 ||
@@ -63,7 +76,7 @@ function hasViewportIntersection({ top, left, width, height }) {
   );
 }
 
-function isEqualRect(aRect, bRect) {
+function isEqualRect(aRect: Rect, bRect: Rect) {
   return (
     aRect.top === bRect.top &&
     aRect.left === bRect.left &&
@@ -72,9 +85,9 @@ function isEqualRect(aRect, bRect) {
   );
 }
 
-function throttle(func, ms) {
+function throttle(func: Function, ms: number) {
   let last = 0;
-  return (...args) => {
+  return (...args: any) => {
     const now = Date.now();
     if (last + ms < now) {
       func(...args);
@@ -83,9 +96,9 @@ function throttle(func, ms) {
   };
 }
 
-function ignoreFirstCall(func) {
+function ignoreFirstCall(func: Function) {
   let called = false;
-  return (...args) => {
+  return (...args: any) => {
     if (called) {
       func(...args);
     }
@@ -93,30 +106,59 @@ function ignoreFirstCall(func) {
   };
 }
 
+export type AutoAlignOptions = {
+  triggerSelector: string;
+};
+
+export type AutoAlignProps = {
+  portalClassName?: string;
+  portalStyle?: object;
+  size?: 'small' | 'medium' | 'large';
+  preventPortalize?: boolean;
+} & Partial<InjectedProps>;
+
+export type InjectedProps = {
+  align: 'left' | 'right';
+  vertAlign: 'top' | 'bottom';
+};
+
+export type AutoAlignState = {
+  triggerRect: Rect;
+  horizAlign: string;
+  vertAlign: string;
+};
+
 /**
  *
  */
-export default function autoAlign(options) {
+export function autoAlign(options: AutoAlignOptions) {
   const { triggerSelector } = options;
 
-  return (Cmp) =>
-    class extends React.Component {
-      static propTypes = {
-        portalClassName: PropTypes.string,
-        portalStyle: PropTypes.object, // eslint-disable-line react/forbid-prop-types
-        size: PropTypes.oneOf(['small', 'medium', 'large']),
-        align: PropTypes.oneOf(['left', 'right']),
-        vertAlign: PropTypes.oneOf(['top', 'bottom']),
-        preventPortalize: PropTypes.bool,
-        children: PropTypes.node,
-      };
+  return <TOriginalProps extends {}>(
+    Cmp: ComponentType<TOriginalProps & InjectedProps>
+  ) => {
+    type ResultProps = TOriginalProps & AutoAlignProps;
+
+    return class extends React.Component<ResultProps, AutoAlignState> {
+      private pid: number | null = null;
+
+      /* eslint-disable react/sort-comp */
+      private node: any;
+
+      private content: any;
+      /* eslint-enable react/sort-comp */
+
+      context!: Pick<
+        ComponentSettingsContext,
+        'portalClassName' | 'portalStyle'
+      >;
 
       static contextTypes = {
         portalClassName: PropTypes.string,
         portalStyle: PropTypes.object, // eslint-disable-line react/forbid-prop-types
       };
 
-      state = {
+      state: AutoAlignState = {
         triggerRect: { top: 0, left: 0, width: 0, height: 0 },
         horizAlign: 'left',
         vertAlign: 'top',
@@ -182,7 +224,7 @@ export default function autoAlign(options) {
         }
       };
 
-      updateAlignment(triggerRect) {
+      updateAlignment(triggerRect: Rect) {
         if (this.content && this.content.node) {
           const {
             horizAlign: oldHorizAlign,
@@ -273,10 +315,10 @@ export default function autoAlign(options) {
             : 0;
         const content = (
           <Cmp
-            align={align.split('-')[0]}
-            vertAlign={vertAlign.split('-')[0]}
-            ref={(cmp) => (this.content = cmp)}
-            {...pprops}
+            align={align.split('-')[0] as InjectedProps['align']}
+            vertAlign={vertAlign.split('-')[0] as InjectedProps['vertAlign']}
+            ref={(cmp: any) => (this.content = cmp)}
+            {...pprops as TOriginalProps}
           >
             {children}
           </Cmp>
@@ -301,4 +343,5 @@ export default function autoAlign(options) {
         );
       }
     };
+  };
 }
diff --git a/src/scripts/DateInput.js b/src/scripts/DateInput.js
index 2d0d5ec5d..9369e3306 100644
--- a/src/scripts/DateInput.js
+++ b/src/scripts/DateInput.js
@@ -2,7 +2,7 @@ import React, { Component } from 'react';
 import PropTypes from 'prop-types';
 import classnames from 'classnames';
 import moment from 'moment';
-import autoAlign from './AutoAlign';
+import { autoAlign } from './AutoAlign';
 import { FormElement } from './FormElement';
 import Input from './Input';
 import { Icon } from './Icon';
diff --git a/src/scripts/DropdownMenu.js b/src/scripts/DropdownMenu.js
index 1bfb30268..0409cfc1f 100644
--- a/src/scripts/DropdownMenu.js
+++ b/src/scripts/DropdownMenu.js
@@ -2,7 +2,7 @@ import React, { Component } from 'react';
 import PropTypes from 'prop-types';
 import classnames from 'classnames';
 import { Icon } from './Icon';
-import autoAlign from './AutoAlign';
+import { autoAlign } from './AutoAlign';
 import { PicklistItem } from './Picklist';
 
 export const DropdownMenuHeader = ({ divider, className, children }) => {
diff --git a/src/scripts/Lookup.js b/src/scripts/Lookup.js
index 32142134b..7aa376066 100644
--- a/src/scripts/Lookup.js
+++ b/src/scripts/Lookup.js
@@ -1,7 +1,7 @@
 import React, { Component } from 'react';
 import PropTypes from 'prop-types';
 import classnames from 'classnames';
-import autoAlign from './AutoAlign';
+import { autoAlign } from './AutoAlign';
 import { FormElement } from './FormElement';
 import Input from './Input';
 import { Icon } from './Icon';
diff --git a/tsconfig.json b/tsconfig.json
index d91070509..5647e0991 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,5 +1,7 @@
 {
   "compilerOptions": {
+    "baseUrl": ".",
+    "paths": { "*": ["types/*"] },
     /* Basic Options */
     "target": "esnext",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
     "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
diff --git a/types/react-relative-portal.d.ts b/types/react-relative-portal.d.ts
new file mode 100644
index 000000000..7423999ce
--- /dev/null
+++ b/types/react-relative-portal.d.ts
@@ -0,0 +1 @@
+declare module 'react-relative-portal';