diff --git a/package.json b/package.json
index 5a1f41c2..4f5501dc 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "baseui-final-form",
-  "version": "3.0.13",
+  "version": "3.0.14",
   "main": "index.js",
   "module": "index.es.js",
   "author": "KahWee Teng <tengkahwee@gmail.com>",
diff --git a/src/validate/__tests__/validate.js b/src/validate/__tests__/validate.js
index 0bf4e974..758cc08b 100644
--- a/src/validate/__tests__/validate.js
+++ b/src/validate/__tests__/validate.js
@@ -70,6 +70,8 @@ describe('validate', () => {
     expect(v.required(true)).toBeUndefined();
     expect(v.required('hello')).toBeUndefined();
     expect(v.required('-')).toBeUndefined();
+    expect(v.required([])).toBeString();
+    expect(v.required(['String'])).toBeUndefined();
   });
 
   it('should check "email" boundaries', () => {
@@ -89,10 +91,29 @@ describe('validate', () => {
     expect(v.numeric('1.23')).toBeUndefined();
   });
 
+  it('should check "integer" boundaries', () => {
+    expect(v.integer('hello')).toBeString();
+    expect(v.integer('-')).toBeString();
+    expect(v.integer('0')).toBeUndefined();
+    expect(v.integer(0)).toBeUndefined();
+    expect(v.integer('1028801')).toBeUndefined();
+    expect(v.integer(1028801)).toBeUndefined();
+    expect(v.integer(-1)).toBeUndefined();
+    expect(v.integer('-1')).toBeUndefined();
+    expect(v.integer(1.23)).toBeString();
+    expect(v.integer('1.23')).toBeString();
+  });
+
   it('should check "uuid" boundaries', () => {
     expect(v.uuid('83cd3add-8a17-459e-b1cb-0becd3891f3d')).toBeUndefined();
     expect(v.uuid('ecf0bd9f-143f-4cb8-bf5c-0f6b209bb020')).toBeUndefined();
     expect(v.uuid('1.23')).toBeString();
     expect(v.uuid('')).toBeUndefined();
   });
+
+  it('composeValidators', () => {
+    const validate = v.composeValidators(v.required, v.integer);
+    expect(validate('2222')).toBeUndefined();
+    expect(validate()).toBeString();
+  });
 });
diff --git a/src/validate/index.js b/src/validate/index.js
index dbfdac37..2458dc79 100644
--- a/src/validate/index.js
+++ b/src/validate/index.js
@@ -37,7 +37,9 @@ export function maxValue(max: number) {
   };
 }
 
-export function required(value: ?string | ?number | ?boolean) {
+export function required(
+  value: ?string | ?number | ?boolean | ?Array<?string>
+) {
   if (Array.isArray(value) && value.length === 0) {
     return 'Required';
   } else if (value === undefined || value === null || value === '') {
@@ -46,7 +48,7 @@ export function required(value: ?string | ?number | ?boolean) {
   return;
 }
 
-export function uuid(value: string) {
+export function uuid(value: ?string) {
   return value &&
     !/^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i.test(
       value
@@ -55,12 +57,27 @@ export function uuid(value: string) {
     : undefined;
 }
 
-export function email(value: string) {
+export function email(value: ?string) {
   return value && !/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i.test(value)
     ? 'Invalid email address'
     : undefined;
 }
 
-export function numeric(value: ?string | number) {
+export function numeric(value: ?string | ?number) {
   return value && !isNumeric(value) ? 'Must be a number' : undefined;
 }
+
+export function integer(value: ?string | ?number) {
+  if (value) {
+    const number = Number(value);
+    if (isNaN(number)) {
+      return 'Must be a number';
+    } else {
+      return Number.isInteger(number) ? undefined : 'Must be an integer';
+    }
+  }
+}
+
+export type ValueT = ?mixed | ?Array<mixed>;
+export const composeValidators = (...validators: any) => (value: ValueT) =>
+  validators.reduce((error, validator) => error || validator(value), undefined);