diff --git a/lib/mockBuilder.js b/lib/mockBuilder.js
index 35f9b91..831f3b9 100644
--- a/lib/mockBuilder.js
+++ b/lib/mockBuilder.js
@@ -1,9 +1,13 @@
 'use strict'
 
 const schemaParser = require('easygraphql-parser')
-const { memoizedField, clearMemoizedFields } = require('../util')
+const settings = require('./settings')
+
+function mockBuilder (schemaCode, customMock, seed) {
+  if (seed) settings['seed'] = seed
+
+  const { memoizedField, clearMemoizedFields } = require('../util')
 
-function mockBuilder (schemaCode, customMock) {
   // Parse the schema on the GQL file to create a cutom object easier to loop
   // and create mocks.
   const schema = schemaParser(schemaCode)
diff --git a/lib/settings.js b/lib/settings.js
new file mode 100644
index 0000000..2917d95
--- /dev/null
+++ b/lib/settings.js
@@ -0,0 +1,2 @@
+const settings = {}
+module.exports = settings
diff --git a/util/chance.js b/util/chance.js
new file mode 100644
index 0000000..6c8f6a4
--- /dev/null
+++ b/util/chance.js
@@ -0,0 +1,7 @@
+const settings = require('../lib/settings')
+
+const Chance = require('chance')
+
+const chance = settings.seed ? new Chance(settings.seed) : new Chance()
+
+module.exports = chance
diff --git a/util/index.js b/util/index.js
index 11196d1..d289f11 100644
--- a/util/index.js
+++ b/util/index.js
@@ -9,7 +9,7 @@ const randomBooleanData = require('./randomData/boolean')
 const { randomNumber } = require('./utils')
 
 let cache = {}
-const memoize = (fn) => {
+const memoize = fn => {
   return (type, customMock, schema) => {
     if (type in cache) {
       return cache[type]
@@ -17,7 +17,10 @@ const memoize = (fn) => {
       // To handle cycles in schema types put a reference to the mocked field in
       // the cache before attempting to compute its properties.
       const result = {}
-      if (schema[type].type === 'InterfaceTypeDefinition' && schema[type].implementedTypes.length) {
+      if (
+        schema[type].type === 'InterfaceTypeDefinition' &&
+        schema[type].implementedTypes.length
+      ) {
         result['__typename'] = schema[type].implementedTypes[0]
       } else {
         result['__typename'] = type
@@ -99,16 +102,14 @@ function createData (field, schemaName, customMock = {}, schema) {
             // Validate if is enun value
             if (schema[field.type].values.length > 0) {
               dataArr.push(selecteEnumVal(field, schema))
-            // validate if is union
+              // validate if is union
             } else if (schema[field.type].types.length > 0) {
               const types = getUnionVals(field, schema)
               types.forEach(type =>
                 dataArr.push(memoizedField(type, customMock, schema))
               )
             } else {
-              dataArr.push(
-                memoizedField(field.type, customMock, schema)
-              )
+              dataArr.push(memoizedField(field.type, customMock, schema))
             }
           }
           return dataArr
diff --git a/util/randomData/number.js b/util/randomData/number.js
index 58a8804..b5321ae 100644
--- a/util/randomData/number.js
+++ b/util/randomData/number.js
@@ -1,11 +1,9 @@
 'use strict'
 
-const Chance = require('chance')
+const chance = require('../chance')
 const constants = require('../constants')
 const { randomNumber } = require('../utils')
 
-const chance = new Chance()
-
 function randomNumberData (field, float) {
   let data
 
@@ -73,11 +71,10 @@ function createDataType (field, float) {
 
 function createRandomNumber (float) {
   if (float) {
-    const precision = 100
-    return Math.floor(Math.random() * (10 * precision - 1 * precision) + 1 * precision) / (1 * precision)
+    return chance.floating({ min: 0, max: 10, fixed: 2 })
   }
 
-  return Math.floor(Math.random() * 11)
+  return chance.integer({ min: 0, max: 10 })
 }
 
 module.exports = randomNumberData
diff --git a/util/randomData/string.js b/util/randomData/string.js
index d4d07ab..cab4a59 100644
--- a/util/randomData/string.js
+++ b/util/randomData/string.js
@@ -1,11 +1,9 @@
 'use strict'
 
-const Chance = require('chance')
+const chance = require('../chance')
 const constants = require('../constants')
 const { randomNumber } = require('../utils')
 
-const chance = new Chance()
-
 function randomStringData (field) {
   let data
 
@@ -102,7 +100,7 @@ function createRandomString (length) {
   const chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
   length = length || randomNumber(5, 20)
   let result = ''
-  for (let i = length; i > 0; --i) result += chars[randomNumber(0, chars.length)]
+  for (let i = length; i > 0; --i) { result += chars[randomNumber(0, chars.length)] }
   return result
 }
 
diff --git a/util/utils.js b/util/utils.js
index a4667b3..2bd7e33 100644
--- a/util/utils.js
+++ b/util/utils.js
@@ -1,5 +1,7 @@
+const chance = require('./chance')
+
 function randomNumber (min, max) {
-  return Math.floor(Math.random() * (max - min + 1)) + min
+  return chance.integer({ min, max })
 }
 
 module.exports = { randomNumber }