diff --git a/composer.json b/composer.json
index c5386244..29bd1154 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     "guzzlehttp/guzzle": "^6.3",
     "ext-json": "^1.5",
     "ext-reflection": "*",
-    "symfony/yaml": "^4.3"
+    "symfony/yaml": "^3.0 || ^4.3"
   },
   "authors": [
     {
diff --git a/composer.lock b/composer.lock
index 7adcbbf3..1f054906 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "7a5d225017cd9ff41bdd25ed63a20a77",
+    "content-hash": "a54038a9842f8776f6679ea1d030209f",
     "packages": [
         {
             "name": "bitpay/key-utils",
@@ -385,7 +385,7 @@
         },
         {
             "name": "symfony/yaml",
-            "version": "v4.3.6",
+            "version": "v4.3.8",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
@@ -446,16 +446,16 @@
     "packages-dev": [
         {
             "name": "doctrine/instantiator",
-            "version": "1.2.0",
+            "version": "1.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "a2c590166b2133a4633738648b6b064edae0814a"
+                "reference": "ae466f726242e637cebdd526a7d991b9433bacf1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/a2c590166b2133a4633738648b6b064edae0814a",
-                "reference": "a2c590166b2133a4633738648b6b064edae0814a",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/ae466f726242e637cebdd526a7d991b9433bacf1",
+                "reference": "ae466f726242e637cebdd526a7d991b9433bacf1",
                 "shasum": ""
             },
             "require": {
@@ -498,7 +498,7 @@
                 "constructor",
                 "instantiate"
             ],
-            "time": "2019-03-17T17:37:11+00:00"
+            "time": "2019-10-21T16:45:58+00:00"
         },
         {
             "name": "myclabs/deep-copy",
diff --git a/examples/ConfigGenerator.php b/examples/ConfigGenerator.php
index e149dfa8..f63af951 100644
--- a/examples/ConfigGenerator.php
+++ b/examples/ConfigGenerator.php
@@ -204,20 +204,20 @@
     "BitPayConfiguration" => [
         "Environment" => $env,
         "EnvConfig"   => [
-            $env => [
-                "PrivateKeyPath"   => $privateKeyname,
-                "PrivateKeySecret" => $yourMasterPassword,
+            'Test' => [
+                "PrivateKeyPath"   => $isProd ? null : __DIR__."/".$privateKeyname,
+                "PrivateKeySecret" => $isProd ? null : $yourMasterPassword,
                 "ApiTokens"        => [
-                    "merchant" => $merchantToken,
-                    "payroll"  => $payrolToken,
+                    "merchant" => $isProd ? null : $merchantToken,
+                    "payroll"  => $isProd ? null : $payrolToken,
                 ],
             ],
             'Prod' => [
-                "PrivateKeyPath"   => $privateKeyname,
-                "PrivateKeySecret" => $yourMasterPassword,
+                "PrivateKeyPath"   => $isProd ? __DIR__."/".$privateKeyname : null,
+                "PrivateKeySecret" => $isProd ? $yourMasterPassword : null,
                 "ApiTokens"        => [
-                    "merchant" => $merchantToken,
-                    "payroll"  => $payrolToken,
+                    "merchant" => $isProd ? $merchantToken : null,
+                    "payroll"  => $isProd ? $payrolToken : null,
                 ],
             ],
         ],
diff --git a/src/BitPaySDK/Client.php b/src/BitPaySDK/Client.php
index 7542db74..d75b9b70 100644
--- a/src/BitPaySDK/Client.php
+++ b/src/BitPaySDK/Client.php
@@ -44,9 +44,9 @@
  * Class Client
  * @package Bitpay
  * @author  Antonio Buedo
- * @version 3.2.1911
+ * @version 3.3.1911
  * See bitpay.com/api for more information.
- * date 05.11.2019
+ * date 15.11.2019
  */
 class Client
 {
diff --git a/src/BitPaySDK/Env.php b/src/BitPaySDK/Env.php
index 147400c3..07fafccc 100644
--- a/src/BitPaySDK/Env.php
+++ b/src/BitPaySDK/Env.php
@@ -11,5 +11,5 @@ interface Env
     const TestUrl          = "https://test.bitpay.com/";
     const ProdUrl          = "https://bitpay.com/";
     const BitpayApiVersion = "2.0.0";
-    const BitpayPluginInfo = "BitPay_PHP_Client_v3.2.1911";
+    const BitpayPluginInfo = "BitPay_PHP_Client_v3.3.1911";
 }
\ No newline at end of file