diff --git a/docs/errors.md b/docs/errors.md
index 015917f..da0a46b 100644
--- a/docs/errors.md
+++ b/docs/errors.md
@@ -29,6 +29,10 @@ When a request returns with an HTTP status code of `403`.
 
 When a request returns with an HTTP status code of `500`.
 
+## `InvalidScopeError`
+
+When a request returns with an HTTP status code of `400` and the response's body contains an error value of `invalid_scope`.
+
 ## `LoginRequiredError`
 
 Returned when a request that requires authentication is performed without the proper credentials.
diff --git a/src/core/errors/index.js b/src/core/errors/index.js
index eeb065b..e2e8135 100644
--- a/src/core/errors/index.js
+++ b/src/core/errors/index.js
@@ -2,6 +2,7 @@ import { AuthorizationRequiredError } from './authorization-required';
 import { BaseError } from './base';
 import { ForbiddenError } from './forbidden';
 import { InternalServerError } from './internal-server';
+import { InvalidScopeError } from './invalid-scope';
 import { NotFoundError } from './not-found';
 import { OTPRequiredError } from './otp-required';
 import { RateLimitError } from './rate-limit';
@@ -15,6 +16,7 @@ export {
   BaseError,
   ForbiddenError,
   InternalServerError,
+  InvalidScopeError,
   NotFoundError,
   OTPRequiredError,
   RateLimitError,
@@ -28,6 +30,7 @@ export default [
   AuthorizationRequiredError,
   ForbiddenError,
   InternalServerError,
+  InvalidScopeError,
   NotFoundError,
   OTPRequiredError,
   RateLimitError,
diff --git a/src/core/errors/invalid-scope.js b/src/core/errors/invalid-scope.js
new file mode 100644
index 0000000..18b485c
--- /dev/null
+++ b/src/core/errors/invalid-scope.js
@@ -0,0 +1,19 @@
+import { BaseError } from './base';
+
+export class InvalidScopeError extends BaseError {
+  static hasError({ body, status } = {}) {
+    if (!status || (!body || !body.error)) {
+      return false;
+    }
+
+    if (status === 400 && body.error === 'invalid_scope') {
+      return true;
+    }
+
+    return false;
+  }
+
+  constructor() {
+    super('invalid_scope', ...arguments);
+  }
+}
diff --git a/test/core/errors/invalid_scope.spec.js b/test/core/errors/invalid_scope.spec.js
new file mode 100644
index 0000000..52b9ce2
--- /dev/null
+++ b/test/core/errors/invalid_scope.spec.js
@@ -0,0 +1,26 @@
+import { InvalidScopeError } from '../../../src/core';
+
+describe('InvalidScopeError', () => {
+  describe('hasError()', () => {
+    it('should return true if response status is 400 and error code is `invalid_scope`', () => {
+      expect(InvalidScopeError.hasError({ body: { error: 'invalid_scope' }, status: 400 })).toBe(true);
+    });
+
+    it('should return false if response does not contain a `invalid_scope` code', () => {
+      expect(InvalidScopeError.hasError({ body: { error: 'foo' }, status: 400 })).toBe(false);
+    });
+
+    it('should return false if response status is not 400', () => {
+      expect(InvalidScopeError.hasError({ body: { error: 'invalid_scope' }, status: 401 })).toBe(false);
+    });
+  });
+
+  describe('constructor()', () => {
+    it('should set `invalid_scope` message and given properties', () => {
+      const error = new InvalidScopeError({ foo: 'bar' });
+
+      expect(error.foo).toBe('bar');
+      expect(error.message).toBe('invalid_scope');
+    });
+  });
+});
diff --git a/test/core/utils/error-factory.spec.js b/test/core/utils/error-factory.spec.js
index 4933f92..4857f57 100644
--- a/test/core/utils/error-factory.spec.js
+++ b/test/core/utils/error-factory.spec.js
@@ -1,6 +1,7 @@
 import {
   ForbiddenError,
   InternalServerError,
+  InvalidScopeError,
   NotFoundError,
   OTPRequiredError,
   RateLimitError,
@@ -21,6 +22,10 @@ describe('ErrorFactory', () => {
       expect(createError({ status: 500 })).toBeInstanceOf(InternalServerError);
     });
 
+    it('should create an `InvalidScopeError`', () => {
+      expect(createError({ body: { error: 'invalid_scope' }, status: 400 })).toBeInstanceOf(InvalidScopeError);
+    });
+
     it('should create a `NotFoundError`', () => {
       expect(createError({ status: 404 })).toBeInstanceOf(NotFoundError);
     });