diff --git a/package.json b/package.json
index 228364c..51372a0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@platformbuilders/validations",
-  "version": "0.0.2",
+  "version": "0.0.3",
   "description": "",
   "author": "Platform Builders <apps@platformbuilders.io>",
   "repository": {
diff --git a/src/isValidCnpj.ts b/src/isValidCnpj.ts
index e15c6d5..17c548b 100644
--- a/src/isValidCnpj.ts
+++ b/src/isValidCnpj.ts
@@ -1,5 +1,5 @@
 import * as CNPJ from '@fnando/cnpj';
 import { toOnlyNumbers } from '@platformbuilders/helpers';
 
-export const isValidCnpj = (value: string): boolean =>
-  CNPJ.isValid(toOnlyNumbers(value));
+export const isValidCnpj = (value?: string): boolean =>
+  value ? CNPJ.isValid(toOnlyNumbers(value)) : false;
diff --git a/src/isValidCpf.ts b/src/isValidCpf.ts
index f5e3c4b..755daae 100644
--- a/src/isValidCpf.ts
+++ b/src/isValidCpf.ts
@@ -1,5 +1,5 @@
 import * as CPF from '@fnando/cpf';
 import { toOnlyNumbers } from '@platformbuilders/helpers';
 
-export const isValidCpf = (value: string): boolean =>
-  CPF.isValid(toOnlyNumbers(value));
+export const isValidCpf = (value?: string): boolean =>
+  value ? CPF.isValid(toOnlyNumbers(value)) : false;