diff --git a/packages/input-value/src/__tests__/index.test.js b/packages/input-value/src/__tests__/index.test.js
index 8044fe1..4c58684 100644
--- a/packages/input-value/src/__tests__/index.test.js
+++ b/packages/input-value/src/__tests__/index.test.js
@@ -2,14 +2,14 @@ import {renderHook, act} from '@testing-library/react-hooks';
 import {useInputValue} from '../index';
 
 test('has value and onChange', () => {
-    const {result} = renderHook(() => useInputValue());
+    const {result} = renderHook(() => useInputValue(''));
     expect(typeof result.current.value).toBe('string');
     expect(typeof result.current.onChange).toBe('function');
 });
 
-test('default initial value to empty string', () => {
+test('default initial value is undefined', () => {
     const {result} = renderHook(() => useInputValue());
-    expect(result.current.value).toBe('');
+    expect(result.current.value).toBe(undefined);
 });
 
 test('specified initial value', () => {
@@ -24,3 +24,9 @@ test('change value via onChange', () => {
     act(() => result.current.onChange({target: {value: newValue}}));
     expect(result.current.value).toBe(newValue);
 });
+
+test('target not in change value', () => {
+    const {result} = renderHook(() => useInputValue());
+    act(() => result.current.onChange('foo'));
+    expect(result.current.value).toBe('foo');
+});
diff --git a/packages/input-value/src/index.ts b/packages/input-value/src/index.ts
index 6927a9e..1471096 100644
--- a/packages/input-value/src/index.ts
+++ b/packages/input-value/src/index.ts
@@ -1,18 +1,19 @@
 import {useState, useCallback} from 'react';
 
-interface ChangeEvent {
-    target: {value: string};
+export interface InputValueState<T> {
+    value: T;
+    onChange(e: any): void;
 }
 
-export interface InputValueState {
-    value: string;
-    onChange(e: ChangeEvent): void;
-}
-
-export function useInputValue(initialValue: string = ''): InputValueState {
-    const [value, setValue] = useState(initialValue);
+export function useInputValue<T = string>(initialValue: T): InputValueState<T> {
+    const [value, setValue] = useState<T>(initialValue);
     const onChange = useCallback(
-        (e: ChangeEvent) => setValue(e.target.value),
+        (event: any) => {
+            const v = event && event.target && 'value' in event.target
+                ? (event.target as HTMLInputElement).value
+                : event;
+            setValue(v as T);
+        },
         []
     );
     return {value, onChange};