diff --git a/src/components/auth/RegisterForm.tsx b/src/components/auth/RegisterForm.tsx
index eccce2a..3cfab54 100644
--- a/src/components/auth/RegisterForm.tsx
+++ b/src/components/auth/RegisterForm.tsx
@@ -22,7 +22,7 @@ const RegisterForm = ({ isLoading, setIsLoading }: RegisterFormProps) => {
   const [nome, setNome] = useState('');
   const [empresa, setEmpresa] = useState('');
   const [email, setEmail] = useState('');
-  const [whatsapp, setWhatsapp] = useState('55');
+  const [whatsapp, setWhatsapp] = useState('55()');
   const [senha, setSenha] = useState('');
   const [confirmaSenha, setConfirmaSenha] = useState('');
 
@@ -37,13 +37,19 @@ const RegisterForm = ({ isLoading, setIsLoading }: RegisterFormProps) => {
     }
     
     // Formata com parênteses para o DDD
-    if (nums.length > 7) {
-      return `${nums.slice(0, 2)}(${nums.slice(2, 4)})${nums.slice(4)}`;
-    } else if (nums.length > 4) {
-      return `${nums.slice(0, 2)}(${nums.slice(2)}`;
+    if (nums.length > 4) {
+      const codigo = nums.slice(0, 2); // 55
+      const ddd = nums.slice(2, 4); // DDD
+      const numero = nums.slice(4); // Resto do número
+      
+      if (nums.length > 6) {
+        return `${codigo}(${ddd})${numero}`;
+      } else {
+        return `${codigo}(${ddd}${numero.length > 0 ? ')' + numero : ''}`;
+      }
     }
     
-    return nums;
+    return nums.length >= 2 ? `${nums.slice(0, 2)}(${nums.slice(2)}` : nums;
   };
 
   // Função para cadastrar usuário
@@ -79,7 +85,7 @@ const RegisterForm = ({ isLoading, setIsLoading }: RegisterFormProps) => {
       // Garantir que todos os parâmetros sejam incluídos na chamada para a função registrar_usuario
       const { data, error } = await supabase.rpc('registrar_usuario', {
         nome,
-        empresa,
+        empresa: empresa || null,
         email,
         senha,
         whatsapp: whatsappLimpo
diff --git a/supabase/functions/update-register-function-sql/index.ts b/supabase/functions/update-register-function-sql/index.ts
index 12e9172..ee5f05c 100644
--- a/supabase/functions/update-register-function-sql/index.ts
+++ b/supabase/functions/update-register-function-sql/index.ts
@@ -25,3 +25,77 @@
 // END;
 // $function$
 
+import { createClient } from 'https://esm.sh/@supabase/supabase-js@2'
+
+const corsHeaders = {
+  'Access-Control-Allow-Origin': '*',
+  'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey, content-type',
+}
+
+Deno.serve(async (req) => {
+  // Handle CORS preflight requests
+  if (req.method === 'OPTIONS') {
+    return new Response(null, { headers: corsHeaders })
+  }
+
+  try {
+    const supabaseUrl = Deno.env.get('SUPABASE_URL')!
+    const supabaseServiceKey = Deno.env.get('SUPABASE_SERVICE_ROLE_KEY')!
+    
+    const supabase = createClient(supabaseUrl, supabaseServiceKey)
+
+    console.log('Updating registrar_usuario function...')
+
+    // Update the registrar_usuario function to include whatsapp parameter
+    const { data, error } = await supabase.rpc('exec', {
+      sql: `
+        CREATE OR REPLACE FUNCTION public.registrar_usuario(
+          nome text,
+          empresa text,
+          email text,
+          senha text,
+          whatsapp text
+        ) RETURNS uuid
+        LANGUAGE plpgsql
+        SECURITY DEFINER
+        AS $function$
+        DECLARE
+          novo_usuario_id UUID;
+        BEGIN
+          -- Inserir novo usuário com senha hash
+          INSERT INTO public.usuarios (nome, empresa, email, senha, whatsapp)
+          VALUES (nome, empresa, email, crypt(senha, gen_salt('bf')), whatsapp)
+          RETURNING id INTO novo_usuario_id;
+          
+          -- Retorna o ID do usuário criado
+          RETURN novo_usuario_id;
+        END;
+        $function$
+      `
+    })
+
+    if (error) {
+      console.error('Error updating function:', error)
+      return new Response(JSON.stringify({ error: error.message }), {
+        status: 500,
+        headers: { ...corsHeaders, 'Content-Type': 'application/json' }
+      })
+    }
+
+    console.log('Function updated successfully')
+    
+    return new Response(JSON.stringify({ 
+      message: 'registrar_usuario function updated successfully',
+      data 
+    }), {
+      headers: { ...corsHeaders, 'Content-Type': 'application/json' }
+    })
+
+  } catch (error) {
+    console.error('Error:', error)
+    return new Response(JSON.stringify({ error: error.message }), {
+      status: 500,
+      headers: { ...corsHeaders, 'Content-Type': 'application/json' }
+    })
+  }
+})