diff --git a/helpers/add-one.js b/helpers/add-one.js
index 21395c0..f7b0651 100644
--- a/helpers/add-one.js
+++ b/helpers/add-one.js
@@ -1,14 +1,14 @@
 'use strict'
 
+var PouchDBErrors = require('pouchdb-errors')
+var Promise = require('lie')
+
 var toDoc = require('../utils/to-doc')
 var addTimestamps = require('../utils/add-timestamps')
 
 module.exports = function addOne (object) {
-  var Promise = this.constructor.utils.Promise
-  var errors = this.constructor.Errors
-
   if (typeof object !== 'object') {
-    return Promise.reject(errors.NOT_AN_OBJECT)
+    return Promise.reject(PouchDBErrors.NOT_AN_OBJECT)
   }
 
   var method = object.id ? 'put' : 'post'
diff --git a/helpers/find-or-add-one.js b/helpers/find-or-add-one.js
index ee09ac3..c0d8490 100644
--- a/helpers/find-or-add-one.js
+++ b/helpers/find-or-add-one.js
@@ -1,20 +1,23 @@
+module.exports = findOrAddOne
+
+var PouchDBErrors = require('pouchdb-errors')
+var Promise = require('lie')
+
 var toId = require('../utils/to-id')
 var findOne = require('./find-one')
 var addOne = require('./add-one')
 var eventify = require('./eventify')
 
-module.exports = function findOrAddOne (state, idOrObject, newObject) {
+function findOrAddOne (state, idOrObject, newObject) {
   var self = this
-  var Promise = this.constructor.utils.Promise
-  var errors = this.constructor.Errors
   var id = toId(idOrObject)
 
   if (!id) {
-    return Promise.reject(errors.MISSING_ID)
+    return Promise.reject(PouchDBErrors.MISSING_ID)
   }
 
   if (idOrObject === id && !newObject) {
-    return Promise.reject(errors.MISSING_ID)
+    return Promise.reject(PouchDBErrors.MISSING_ID)
   }
 
   return findOne.call(this, id)
diff --git a/helpers/update-many.js b/helpers/update-many.js
index 409f2b1..590899c 100644
--- a/helpers/update-many.js
+++ b/helpers/update-many.js
@@ -1,6 +1,7 @@
 'use strict'
 
 var extend = require('pouchdb-extend')
+var PouchDBErrors = require('pouchdb-errors')
 
 var changeObject = require('../utils/change-object')
 var toDoc = require('../utils/to-doc')
@@ -11,7 +12,6 @@ var findMany = require('./find-many')
 
 module.exports = function updateMany (array, change) {
   var self = this
-  var errors = this.constructor.Errors
   var objects
   var ids = array.map(toId)
 
@@ -33,7 +33,7 @@ module.exports = function updateMany (array, change) {
         return object
       }
       if (typeof passedObject !== 'object') {
-        return errors.NOT_AN_OBJECT
+        return PouchDBErrors.NOT_AN_OBJECT
       }
       return extend(object, passedObject)
     })
diff --git a/helpers/update-one.js b/helpers/update-one.js
index aea338d..7ab971a 100644
--- a/helpers/update-one.js
+++ b/helpers/update-one.js
@@ -1,6 +1,8 @@
 'use strict'
 
 var extend = require('pouchdb-extend')
+var PouchDBErrors = require('pouchdb-errors')
+var Promise = require('lie')
 
 var changeObject = require('../utils/change-object')
 var toDoc = require('../utils/to-doc')
@@ -10,12 +12,10 @@ var findOne = require('./find-one')
 
 module.exports = function updateOne (idOrObject, change) {
   var self = this
-  var Promise = this.constructor.utils.Promise
-  var errors = this.constructor.Errors
   var object
 
   if (typeof idOrObject === 'string' && !change) {
-    return Promise.reject(errors.NOT_AN_OBJECT)
+    return Promise.reject(PouchDBErrors.NOT_AN_OBJECT)
   }
 
   return findOne.call(this, idOrObject)
diff --git a/update-all.js b/update-all.js
index 3a45f2e..f292abc 100644
--- a/update-all.js
+++ b/update-all.js
@@ -1,14 +1,13 @@
-'use strict'
+module.exports = updateAll
 
 var extend = require('pouchdb-extend')
+var Promise = require('lie')
 
 var toObject = require('./utils/to-object')
 var toDoc = require('./utils/to-doc')
 var addTimestamps = require('./utils/add-timestamps')
 var isntDesignDoc = require('./utils/isnt-design-doc')
 
-module.exports = updateAll
-
 /**
  * updates all existing objects
  *
@@ -17,8 +16,6 @@ module.exports = updateAll
  * @return {Promise}
  */
 function updateAll (changedProperties) {
-  var Promise = this.constructor.utils.Promise
-
   var type = typeof changedProperties
   var objects
 
diff --git a/update.js b/update.js
index c8121c3..3f178fa 100644
--- a/update.js
+++ b/update.js
@@ -1,10 +1,10 @@
-'use strict'
+module.exports = update
+
+var Promise = require('lie')
 
 var updateOne = require('./helpers/update-one')
 var updateMany = require('./helpers/update-many')
 
-module.exports = update
-
 /**
  * updates existing object.
  *
@@ -15,7 +15,7 @@ module.exports = update
  */
 function update (objectsOrIds, change) {
   if (typeof objectsOrIds !== 'object' && !change) {
-    return this.constructor.utils.Promise.reject(
+    return Promise.reject(
       new Error('Must provide change')
     )
   }