diff --git a/test/test_validate.js b/test/test_validate.js
index 5709de1..d2d41bd 100644
--- a/test/test_validate.js
+++ b/test/test_validate.js
@@ -18,6 +18,13 @@ describe('koa-validate' , function(){
 			this.checkBody('ensure').ensure(true);
 			this.checkBody('ensureNot').ensureNot(false);
 			this.checkBody('integer').isInt();
+			this.checkBody('integer').isInt(null, {min:12});
+			this.checkBody('integer').isInt(null, {max:12});
+			this.checkBody('integer').isInt(null, {min:12,max:12});
+			this.checkBody('stringInteger').isInt();
+			this.checkBody('stringInteger').isInt(null, {min:12});
+			this.checkBody('stringInteger').isInt(null, {max:12});
+			this.checkBody('stringInteger').isInt(null, {min:12,max:12});
 			this.checkBody('float_').isFloat();
 			this.checkBody('in').in([1,2]);
 			this.checkBody('eq').eq("eq");
@@ -93,6 +100,7 @@ describe('koa-validate' , function(){
 			ensure:"",
 			ensureNot:"",
 			integer:12,
+			stringInteger:"12",
 			float_:1.23,
 			in:1,
 			eq:"eq",
@@ -150,7 +158,10 @@ describe('koa-validate' , function(){
 			this.checkBody('blank').notBlank();
 			this.checkBody('notEmpty').len(2,3);
 			this.checkBody('match').match(/^abc$/i);
-			this.checkBody('integer').isInt(/^abc$/i);
+			this.checkBody('integer').isInt();
+			this.checkBody('integer2').isInt(null, {min:101});
+			this.checkBody('integer2').isInt(null, {max:99});
+			this.checkBody('integer2').isInt(null, {min:1,max:99});
 			this.checkBody('float_').isFloat();
 			this.checkBody('in').in([1,2]);
 			this.checkBody('eq').eq("eq");
@@ -179,7 +190,7 @@ describe('koa-validate' , function(){
 			this.checkBody('n').isNull();
 			this.checkBody('len').isLength(3,4);
 			this.checkBody('len1').isLength(3,4);
-			this.checkBody('byteLenght').isByteLength(4,6);
+			this.checkBody('byteLength').isByteLength(4,6);
 			this.checkBody('uuid').isUUID();
 			this.checkBody('time').isTime();
 			this.checkBody('date').isDate();
@@ -203,7 +214,7 @@ describe('koa-validate' , function(){
 			this.checkBody('isin').isISIN();
 			this.checkBody('fqdn').isFQDN();
 			this.checkBody('fqdn1').isFQDN();
-			if(this.errors.length === 58){
+			if(this.errors.length === 61){
 				this.body = this.errors;
 				this.body = 'ok';
 				return ;
@@ -222,6 +233,7 @@ describe('koa-validate' , function(){
 			len1:"length1",
 			match:"xyz",
 			integer:"12a",
+			integer2:"100",
 			float_:'a1.23',
 			in:'fd',
 			eq:"neq",
@@ -244,7 +256,7 @@ describe('koa-validate' , function(){
 			up:"re",
 			div:"22",
 			n:"f",
-			byteLenght:"你",
+			byteLength:"你",
 			uuid:"c8162b90-fdda-4803-843bed5851480c86",
 			date:"2014-0807",
 			time:"24:00:00",
@@ -311,6 +323,13 @@ describe('koa-validate' , function(){
 		app.router.post('/sanitizers',function*(){
 			this.checkBody('default').default('default');
 			this.checkBody('int_').toInt();
+			this.checkBody('int_').toInt(null, 10, {min:20});
+			this.checkBody('int_').toInt(null, 10, {max:20});
+			this.checkBody('int_').toInt(null, 10, {min:20,max:20});
+			this.checkBody('octal_').toInt(null, 8);
+			this.checkBody('octal_').toInt(null, 8, {min:8});
+			this.checkBody('octal_').toInt(null, 8, {max:8});
+			this.checkBody('octal_').toInt(null, 8, {min:8,max:8});
 			this.checkBody('float_').toFloat();
 			this.checkBody('bool').toBoolean();
 			this.checkBody('falseValue').notEmpty('value is empty').toBoolean();
@@ -348,6 +367,9 @@ describe('koa-validate' , function(){
 			if(20 !== body.int_ ){
 				this.throw(500);
 			}
+			if(8 !== body.octal_ ){
+				this.throw(500);
+			}
 			if(1.2 !== body.float_ ){
 				this.throw(500);
 			}
@@ -426,6 +448,7 @@ describe('koa-validate' , function(){
 		.post('/sanitizers')
 		.send({
 			int_:'20',
+			octal_:'10',
 			float_:'1.2',
 			bool:'1',
 			falseValue:'false',
diff --git a/validate.js b/validate.js
index e171bd8..6de7ddb 100644
--- a/validate.js
+++ b/validate.js
@@ -161,8 +161,8 @@ Validator.prototype.ensure = function(assertion, tip, shouldBail) {
     return this;
 };
 
-Validator.prototype.isInt = function(tip) {
-	if (this.goOn&& ("number" != typeof this.value && (!isString(this.value) || !v.isInt(this.value)))) {
+Validator.prototype.isInt = function(tip, options) {
+	if (this.goOn&& !v.isInt(String(this.value), options)) {
 		this.addError(tip || this.key + " is not integer.");
 	}
 	return this;
@@ -492,13 +492,13 @@ Validator.prototype.toDate = function() {
 	}
 	return this;
 };
-Validator.prototype.toInt = function(tip) {
-	this.isInt(tip);
+Validator.prototype.toInt = function(tip, radix, options) {
+	this.isInt(tip, options);
 	if (!this.hasError()) {
 		if('number' == typeof(this.value)) {
 			return this;
 		}
-		this.value = this.params[this.key] = v.toInt(this.value);
+		this.value = this.params[this.key] = v.toInt(this.value, radix);
 	}
 	return this;
 };