diff --git a/.vscode/settings.json b/.vscode/settings.json
index 1e69f7f..b203bbd 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -12,6 +12,7 @@
     "aliquota",
     "Amazônia",
     "autoload",
+    "boletos",
     "borderô",
     "Borderos",
     "borderôs",
diff --git a/README.md b/README.md
index 835efe4..05ea974 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 Pacote de integração com a [API v3 do ERP Bling](https://developer.bling.com.br)
 para Javascript/TypeScript. O mais completo existente.
 
-Atualizado com a versão `v306` da API ([veja o registro de alterações](https://developer.bling.com.br/changelogs#2024-08-16)).
+Atualizado com a versão `v307` da API ([veja o registro de alterações](https://developer.bling.com.br/changelogs#2024-08-21)).
 
 **Atenção**: a versão 5.0.0+ do `bling-erp-api` para Javascript/TypeScript
 utiliza a API v3 do Bling. Caso deseja utilizar a API v2 do Bling,
diff --git a/src/entities/contasReceber/__tests__/cancel-bank-slips-response.ts b/src/entities/contasReceber/__tests__/cancel-bank-slips-response.ts
index 8ed70b2..30860da 100644
--- a/src/entities/contasReceber/__tests__/cancel-bank-slips-response.ts
+++ b/src/entities/contasReceber/__tests__/cancel-bank-slips-response.ts
@@ -1,9 +1,15 @@
 export default null
 
 export const cancelBankSlipRequest = {
-  type2FA: 1,
-  code2FA: '111111',
-  idOrigem: 16853468718,
-  idDuplicata: 16853468712,
-  reason: 'motivo'
+  autenticacao: {
+    tipo: 1 as const,
+    codigo: "111111"
+  },
+  origem: {
+    id: 5436875653
+  },
+  conta: {
+    id: 6423836115
+  },
+  motivo: "Cancelado por força maior"
 }
diff --git a/src/entities/contasReceber/__tests__/get-bank-slips-response.ts b/src/entities/contasReceber/__tests__/get-bank-slips-response.ts
index cbbbac9..347929b 100644
--- a/src/entities/contasReceber/__tests__/get-bank-slips-response.ts
+++ b/src/entities/contasReceber/__tests__/get-bank-slips-response.ts
@@ -1,18 +1,18 @@
 export default {
-  numberSale: '149',
-  numberNF: '000001',
-  amountAccounts: 1,
-  amountValuesAccounts: 111.2,
-  haveAccountWithIntegration: true,
-  accounts: [
+  venda: {
+    numero: "123"
+  },
+  notaFiscal: {
+    numero: "000001"
+  },
+  valorTotal: 111.2,
+  contas: [
     {
       id: 1328793273,
-      idExternal: 'BWbXB',
-      dueDate: '2023-09-12',
-      value: 111.2,
-      situation: 'aberto' as const,
-      iconSituation: 'aberto',
-      descriptionSituation: 'Em aberto'
+      numeroExterno: "BWbXB",
+      vencimento: "2023-09-12",
+      valor: 111.2,
+      situacao: 1 as const
     }
   ]
 }
diff --git a/src/entities/contasReceber/index.ts b/src/entities/contasReceber/index.ts
index 5646add..6160945 100644
--- a/src/entities/contasReceber/index.ts
+++ b/src/entities/contasReceber/index.ts
@@ -88,23 +88,23 @@ export class ContasReceber extends Entity {
   }
 
   /**
-   * Obtém os boletos - Bling conta.
+   * Obtém boletos de contas a receber.
    *
    * @param {IGetBankSlipsParams} params Parâmetros da busca.
    *
    * @returns {Promise<IGetBankSlipsResponse>}
    * @throws {BlingApiException|BlingInternalException}
    *
-   * @see https://developer.bling.com.br/referencia#/Contas%20a%20Receber/get_contas_receber_view_bankslips
+   * @see https://developer.bling.com.br/referencia#/Contas%20a%20Receber/get_contas_receber_boletos
    */
   public async getBankSlips(
     params: IGetBankSlipsParams
   ): Promise<IGetBankSlipsResponse> {
     return await this.repository.index({
-      endpoint: 'contas/receber/view/bankslips',
+      endpoint: 'contas/receber/boletos',
       params: {
         idOrigem: params.idOrigem,
-        situations: params.situations
+        situacoes: params.situacoes
       }
     })
   }
@@ -158,7 +158,7 @@ export class ContasReceber extends Entity {
    */
   public async cancelBankSlips(body: ICancelBankSlipsBody): Promise<null> {
     return await this.repository.store({
-      endpoint: 'contas/receber/cancel/bankslips',
+      endpoint: 'contas/receber/boletos/cancelar',
       body
     })
   }
diff --git a/src/entities/contasReceber/interfaces/cancel-bank-slips.interface.ts b/src/entities/contasReceber/interfaces/cancel-bank-slips.interface.ts
index e891853..197980b 100644
--- a/src/entities/contasReceber/interfaces/cancel-bank-slips.interface.ts
+++ b/src/entities/contasReceber/interfaces/cancel-bank-slips.interface.ts
@@ -1,37 +1,15 @@
-interface ContasReceberBankSlipsCancelUnicoDTO {
-  type2FA: number
-  code2FA: string
-  /**
-   * caso for cancelar uma conta sem idOrigem enviar o valor `0`
-   */
-  idOrigem: number
-  idDuplicata: number
-  reason: string
+import { ITipoAutenticacao } from "../types/tipo-autenticacao.type"
+
+export interface ICancelBankSlipsBody {
+  autenticacao?: {
+    tipo: ITipoAutenticacao
+    codigo: string
+  },
+  origem?: {
+    id: number
+  },
+  conta?: {
+    id: number
+  },
+  motivo: string
 }
-
-interface ContasReceberBankSlipsCancelTodosDTO {
-  type2FA: number
-  code2FA: string
-  idOrigem: number
-  reason: string
-}
-
-interface ContasReceberBankSlipsCancelUnicoSem2FADTO {
-  /**
-   * caso for cancelar uma conta sem idOrigem enviar o valor `0`
-   */
-  idOrigem: number
-  idDuplicata: number
-  reason: string
-}
-
-interface ContasReceberBankSlipsCancelTodosSem2FADTO {
-  idOrigem: number
-  reason: string
-}
-
-export type ICancelBankSlipsBody =
-  | ContasReceberBankSlipsCancelUnicoDTO
-  | ContasReceberBankSlipsCancelTodosDTO
-  | ContasReceberBankSlipsCancelUnicoSem2FADTO
-  | ContasReceberBankSlipsCancelTodosSem2FADTO
diff --git a/src/entities/contasReceber/interfaces/get-bank-slips.interface.ts b/src/entities/contasReceber/interfaces/get-bank-slips.interface.ts
index 31a2c84..3514c67 100644
--- a/src/entities/contasReceber/interfaces/get-bank-slips.interface.ts
+++ b/src/entities/contasReceber/interfaces/get-bank-slips.interface.ts
@@ -1,23 +1,23 @@
-import { ISituacaoString } from '../types/situacao.type'
+import { ISituacao } from '../types/situacao.type'
 
 export interface IGetBankSlipsParams {
   idOrigem: number
-  situations?: ISituacaoString[]
+  situacoes?: ISituacao[]
 }
 
 export interface IGetBankSlipsResponse {
-  numberSale: string
-  numberNF: string
-  amountAccounts: number
-  amountValuesAccounts: number
-  haveAccountWithIntegration: boolean
-  accounts: {
+  venda: {
+    numero: string
+  },
+  notaFiscal: {
+    numero: string
+  },
+  valorTotal: number
+  contas: {
     id: number
-    idExternal: string
-    dueDate: string
-    value: number
-    situation: ISituacaoString
-    iconSituation: string
-    descriptionSituation: string
+    numeroExterno: string
+    vencimento: string
+    valor: number
+    situacao: ISituacao
   }[]
 }
diff --git a/src/entities/contasReceber/types/tipo-autenticacao.type.ts b/src/entities/contasReceber/types/tipo-autenticacao.type.ts
new file mode 100644
index 0000000..6ecfd4e
--- /dev/null
+++ b/src/entities/contasReceber/types/tipo-autenticacao.type.ts
@@ -0,0 +1,5 @@
+/**
+ * - `1`: Código de autenticação por dois fatores
+ * - `4`: Senha de 6 dígitos do app Bling Conta
+ */
+export type ITipoAutenticacao = 1 | 4
diff --git a/src/entities/naturezasDeOperacoes/__tests__/index.spec.ts b/src/entities/naturezasDeOperacoes/__tests__/index.spec.ts
index 478d472..61e89a5 100644
--- a/src/entities/naturezasDeOperacoes/__tests__/index.spec.ts
+++ b/src/entities/naturezasDeOperacoes/__tests__/index.spec.ts
@@ -1,11 +1,11 @@
 import { Chance } from 'chance'
 import { NaturezasDeOperacoes } from '..'
 import { InMemoryBlingRepository } from '../../../repositories/bling-in-memory.repository'
-import { ICalculateItemTaxResponse } from '../interfaces/calculate-item-tax.interface'
+import { IObtainTaxResponse } from '../interfaces/obtain-tax.interface'
 import { IGetResponse } from '../interfaces/get.interface'
-import calculateItemTaxResponse, {
-  calculateItemTaxRequestBody
-} from './calculate-item-tax-response'
+import obtainTaxResponse, {
+  obtainTaxRequestBody
+} from './obtain-tax-response'
 import getResponse from './get-response'
 
 const chance = Chance()
@@ -44,24 +44,24 @@ describe('Naturezas de Operação entity', () => {
     expect(typingResponseTest).toBe(getResponse)
   })
 
-  it('should calculate item tax successfully', async () => {
+  it('should obtain tax successfully', async () => {
     const spy = jest.spyOn(repository, 'store')
     const idNaturezaOperacao = chance.natural()
-    repository.setResponse(calculateItemTaxResponse)
+    repository.setResponse(obtainTaxResponse)
 
-    const response = await entity.calculateItemTax({
+    const response = await entity.obtainTax({
       idNaturezaOperacao,
-      ...calculateItemTaxRequestBody
+      ...obtainTaxRequestBody
     })
 
     expect(spy).toHaveBeenCalledWith({
       endpoint: `naturezas-operacoes/${idNaturezaOperacao}/calcular-imposto-item`,
-      body: calculateItemTaxRequestBody
+      body: obtainTaxRequestBody
     })
-    expect(response).toBe(calculateItemTaxResponse)
+    expect(response).toBe(obtainTaxResponse)
 
-    const typingResponseTest: ICalculateItemTaxResponse =
-      calculateItemTaxResponse
-    expect(typingResponseTest).toBe(calculateItemTaxResponse)
+    const typingResponseTest: IObtainTaxResponse =
+      obtainTaxResponse
+    expect(typingResponseTest).toBe(obtainTaxResponse)
   })
 })
diff --git a/src/entities/naturezasDeOperacoes/__tests__/calculate-item-tax-response.ts b/src/entities/naturezasDeOperacoes/__tests__/obtain-tax-response.ts
similarity index 99%
rename from src/entities/naturezasDeOperacoes/__tests__/calculate-item-tax-response.ts
rename to src/entities/naturezasDeOperacoes/__tests__/obtain-tax-response.ts
index b963690..dd52c14 100644
--- a/src/entities/naturezasDeOperacoes/__tests__/calculate-item-tax-response.ts
+++ b/src/entities/naturezasDeOperacoes/__tests__/obtain-tax-response.ts
@@ -213,7 +213,7 @@ export default {
   }
 }
 
-export const calculateItemTaxRequestBody = {
+export const obtainTaxRequestBody = {
   tipoNota: 1 as const,
   uf: 'RS' as const,
   municipio: {
diff --git a/src/entities/naturezasDeOperacoes/index.ts b/src/entities/naturezasDeOperacoes/index.ts
index 9db4e40..a0fabc4 100644
--- a/src/entities/naturezasDeOperacoes/index.ts
+++ b/src/entities/naturezasDeOperacoes/index.ts
@@ -1,9 +1,9 @@
 import { Entity } from '../@shared/entity'
 import {
-  ICalculateItemTaxBody,
-  ICalculateItemTaxParams,
-  ICalculateItemTaxResponse
-} from './interfaces/calculate-item-tax.interface'
+  IObtainTaxBody,
+  IObtainTaxParams,
+  IObtainTaxResponse
+} from './interfaces/obtain-tax.interface'
 import { IGetParams, IGetResponse } from './interfaces/get.interface'
 
 /**
@@ -35,21 +35,21 @@ export class NaturezasDeOperacoes extends Entity {
   }
 
   /**
-   * Calcula os impostos de um item.
+   * Obtém regras de tributação da natureza de operação.
    *
-   * @param {ICalculateItemTaxParams & ICalculateItemTaxBody} params O conteúdo para o cálculo.
+   * @param {IObtainTaxParams & IObtainTaxBody} params O conteúdo para o cálculo.
    *
-   * @returns {Promise<ICalculateItemTaxResponse>}
+   * @returns {Promise<IObtainTaxResponse>}
    * @throws {BlingApiException|BlingInternalException}
    *
-   * @see https://developer.bling.com.br/referencia#/Naturezas%20de%20Opera%C3%A7%C3%B5es/post_naturezas_operacoes__idNaturezaOperacao__calcular_imposto_item
+   * @see https://developer.bling.com.br/referencia#/Naturezas%20de%20Opera%C3%A7%C3%B5es/post_naturezas_operacoes__idNaturezaOperacao__obter_tributacao
    */
-  public async calculateItemTax(
-    params: ICalculateItemTaxParams & ICalculateItemTaxBody
-  ): Promise<ICalculateItemTaxResponse> {
+  public async obtainTax(
+    params: IObtainTaxParams & IObtainTaxBody
+  ): Promise<IObtainTaxResponse> {
     const { idNaturezaOperacao, ...body } = params
     return await this.repository.store({
-      endpoint: `naturezas-operacoes/${idNaturezaOperacao}/calcular-imposto-item`,
+      endpoint: `naturezas-operacoes/${idNaturezaOperacao}/obter-tributacao`,
       body
     })
   }
diff --git a/src/entities/naturezasDeOperacoes/interfaces/calculate-item-tax.interface.ts b/src/entities/naturezasDeOperacoes/interfaces/obtain-tax.interface.ts
similarity index 97%
rename from src/entities/naturezasDeOperacoes/interfaces/calculate-item-tax.interface.ts
rename to src/entities/naturezasDeOperacoes/interfaces/obtain-tax.interface.ts
index 594e662..0e6494a 100644
--- a/src/entities/naturezasDeOperacoes/interfaces/calculate-item-tax.interface.ts
+++ b/src/entities/naturezasDeOperacoes/interfaces/obtain-tax.interface.ts
@@ -6,14 +6,14 @@ import { IMotivoDesoneracaoICMS } from '../types/motivo-desoneracao-icms.type'
 import { ITipoNota } from '../types/tipo-nota.type'
 import { ITributacao } from '../types/tributacao.type'
 
-export interface ICalculateItemTaxParams {
+export interface IObtainTaxParams {
   /**
    * ID da natureza de operação
    */
   idNaturezaOperacao: number
 }
 
-export interface ICalculateItemTaxBody {
+export interface IObtainTaxBody {
   tipoNota: ITipoNota
   uf: IUF
   municipio: { id: number }
@@ -32,7 +32,7 @@ export interface ICalculateItemTaxBody {
   }
 }
 
-export interface ICalculateItemTaxResponse {
+export interface IObtainTaxResponse {
   data: {
     faturada?: boolean
     observacoes?: string