diff --git a/types/react-toastify/index.d.ts b/types/react-toastify/index.d.ts
new file mode 100644
index 0000000000..e77ef01837
--- /dev/null
+++ b/types/react-toastify/index.d.ts
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+// Type definitions for react-toastify 4.0
+// Project: https://github.com/fkhadra/react-toastify#readme
+// Definitions by: icopp <https://github.com/icopp>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.6
+
+import * as React from 'react';
+import { Transition } from 'react-transition-group';
+
+export type ToastCloseButton = React.ReactElement<any & { closeToast(): void }>;
+
+export interface ToastAndToastContainerOptions {
+    /**
+     * @default 'top-right'
+     */
+    position?: 'top-right' | 'top-center' | 'top-left' | 'bottom-right' | 'bottom-center' | 'bottom-left';
+
+    /**
+     * Delay in ms to close the toast. If set to false, the notification needs
+     * to be closed manually.
+     * @default 5000
+     */
+    autoClose?: false | number;
+
+    /**
+     * A React Component to replace the default close button or false to
+     * hide the button.
+     */
+    closeButton?: false | ToastCloseButton;
+
+    /**
+     * A reference to a valid react-transition-group/Transition component.
+     */
+    transition?: Transition;
+
+    /**
+     * Display or not the progress bar below the toast (remaining time).
+     * @default false
+     */
+    hideProgressBar?: boolean;
+
+    /**
+     * Keep the timer running or not on hover.
+     * @default true
+     */
+    pauseOnHover?: boolean;
+
+    /**
+     * Dismiss toast on click.
+     * @default true
+     */
+    closeOnClick?: boolean;
+
+    /**
+     * Add optional classes to the toast body.
+     */
+    bodyClassName?: string;
+
+    /**
+     * Add optional classes to the progress bar.
+     */
+    progressClassName?: string;
+
+    /**
+     * Allow toast to be draggable.
+     * @default true
+     */
+    draggable?: boolean;
+
+    /**
+     * The percentage of the toast's width it takes for a drag to dismiss a
+     * toast (value between 0 and 100).
+     * @default 80
+     */
+    draggablePercent?: number;
+}
+
+export interface ToastContainerProps extends ToastAndToastContainerOptions {
+    /**
+     * Support right to left content.
+     * @default false
+     */
+    rtl?: boolean;
+
+    /**
+     * Display newest toast on top.
+     * @default false
+     */
+    newestOnTop?: boolean;
+
+    /**
+     * Pause on document visibility change (resizing the window, for
+     * instance).
+     * @default true
+     */
+    pauseOnVisibilityChange?: boolean;
+
+    /**
+     * Add optional inline style to the container.
+     */
+    style?: React.CSSProperties;
+
+    /**
+     * Add optional classes to the container.
+     */
+    className?: string;
+
+    /**
+     * Add optional classes to the toast.
+     */
+    toastClassName?: string;
+}
+
+export interface ToastOptions extends ToastAndToastContainerOptions {
+    /**
+     * Kind of notification.
+     * @default 'default'
+     */
+    type?: 'default' | 'success' | 'info' | 'warning' | 'error';
+
+    /**
+     * Called inside componentDidMount.
+     */
+    onOpen?(childrenProps: React.Props<any>): void;
+
+    /**
+     * Called inside componentWillUnmount.
+     */
+    onClose?(childrenProps: React.Props<any>): void;
+
+    /**
+     * Add optional classes to the toast.
+     */
+    className?: string;
+
+    /**
+     * String or React Element, only available when calling update.
+     */
+    render?: string | React.ReactElement<any>;
+}
+
+export interface Toast {
+    /**
+     * @return The ID of the toast, for future reference.
+     */
+    (content: React.ReactNode | ((props: { closeToast(): void }) => React.ReactNode), options?: ToastOptions): string;
+
+    /**
+     * Dismiss the toast with the given ID, or all toasts if no ID is given.
+     */
+    dismiss(toastId?: string): void;
+
+    /**
+     * Test if the toast with the given ID is active.
+     */
+    isActive(toastId?: string): boolean;
+
+    /**
+     * Shorthand for a toast with `type: toast.TYPE.SUCCESS`.
+     */
+    success(content: React.ReactNode, options?: ToastOptions): string;
+
+    /**
+     * Shorthand for a toast with `type: toast.TYPE.INFO`.
+     */
+    info(content: React.ReactNode, options?: ToastOptions): string;
+
+    /**
+     * Shorthand for a toast with `type: toast.TYPE.WARNING`.
+     */
+    warning(content: React.ReactNode, options?: ToastOptions): string;
+
+    /**
+     * Shorthand for a toast with `type: toast.TYPE.ERROR`.
+     */
+    error(content: React.ReactNode, options?: ToastOptions): string;
+
+    /**
+     * Update an existing toast by ID.
+     */
+    update(id: string, options: ToastOptions & { render: React.ReactNode }): void;
+
+    POSITION: {
+        TOP_LEFT: 'top-left'
+        TOP_RIGHT: 'top-right'
+        TOP_CENTER: 'top-center'
+        BOTTOM_LEFT: 'bottom-left'
+        BOTTOM_RIGHT: 'bottom-right'
+        BOTTOM_CENTER: 'bottom-center'
+    };
+
+    TYPE: {
+        INFO: 'info'
+        SUCCESS: 'success'
+        WARNING: 'warning'
+        ERROR: 'error'
+        DEFAULT: 'default'
+    };
+}
+
+export interface CssTransitionOptions {
+    /** The class name that will be used when the toast enters. */
+    enter: string;
+    /** The class name that will be used when the toast exits. */
+    exit: string;
+    /**
+     * The transition duration in ms.
+     * @default 750
+     */
+    duration?: number | number[];
+    /**
+     * Append or not the position to the class name:
+     * yourClassName--top-right, yourClassName--bottom-left...
+     * @default false
+     */
+    appendPosition?: boolean;
+}
+
+export function cssTransition(options: CssTransitionOptions): Transition;
+
+export const ToastContainer: React.StatelessComponent<ToastContainerProps>;
+export const toast: Toast;
+
+export const Bounce: Transition;
+export const Slide: Transition;
+export const Zoom: Transition;
+export const Flip: Transition;
diff --git a/types/react-toastify/react-toastify-tests.ts b/types/react-toastify/react-toastify-tests.ts
new file mode 100644
index 0000000000..06219125e4
--- /dev/null
+++ b/types/react-toastify/react-toastify-tests.ts
@@ -0,0 +1,9 @@
+import { toast } from 'react-toastify';
+
+const someToastId = toast('Testing!'); // $ExpectType string
+
+// $ExpectType void
+toast.update(someToastId, {
+    render: "New Content",
+    type: toast.TYPE.INFO
+});
diff --git a/types/react-toastify/tsconfig.json b/types/react-toastify/tsconfig.json
new file mode 100644
index 0000000000..2a02187994
--- /dev/null
+++ b/types/react-toastify/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "react-toastify-tests.ts"
+    ]
+}
diff --git a/types/react-toastify/tslint.json b/types/react-toastify/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/react-toastify/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }