diff --git a/composer.json b/composer.json
index a687e7b..39776c7 100644
--- a/composer.json
+++ b/composer.json
@@ -23,14 +23,21 @@
     "php": ">=5.6.0",
     "ext-json": "*",
     "guzzlehttp/guzzle": "^6.2.1 || ^7.0.1",
-    "phpseclib/phpseclib": "^2.0.11",
+    "phpseclib/phpseclib": "^3.0",
+    "phpseclib/phpseclib2_compat": "^1.0",
     "gree/jose": "^2.2.1"
   },
   "autoload": {
-    "psr-4": { "Hyperwallet\\": "src/Hyperwallet", "ComposerScript\\" : "src/ComposerScript" }
+    "psr-4": {
+      "Hyperwallet\\": "src/Hyperwallet",
+      "ComposerScript\\": "src/ComposerScript"
+    }
   },
-  "autoload-dev" : {
-    "psr-4": { "Hyperwallet\\Tests\\" : "tests/Hyperwallet/Tests", "ComposerScript\\" : "src/ComposerScript" }
+  "autoload-dev": {
+    "psr-4": {
+      "Hyperwallet\\Tests\\": "tests/Hyperwallet/Tests",
+      "ComposerScript\\": "src/ComposerScript"
+    }
   },
   "require-dev": {
     "phpunit/phpunit": "^5.7 || ^7.0.0 || ^9.0",
diff --git a/src/Hyperwallet/Util/HyperwalletEncryption.php b/src/Hyperwallet/Util/HyperwalletEncryption.php
index 73cb652..4c14b15 100644
--- a/src/Hyperwallet/Util/HyperwalletEncryption.php
+++ b/src/Hyperwallet/Util/HyperwalletEncryption.php
@@ -221,9 +221,18 @@ private function getPrivateKey($privateKeyData) {
         array_unshift($coefficients, "phoney");
         unset($coefficients[0]);
 
-        $pemData = (new RSA())->_convertPrivateKey($n, $e, $d, $primes, $exponents, $coefficients);
         $privateKey = new RSA();
-        $privateKey->loadKey($pemData);
+        $privateKey->loadKey(array(
+            'n'  => $n,
+            'e'  => $e,
+            'd'  => $d,
+            'p'  => $p,
+            'q'  => $q,
+            'dp' => $dp,
+            'dq' => $dq,
+            'qi' => $qi
+        ));
+        
         if ($privateKeyData['alg'] == 'RSA-OAEP-256') {
             $privateKey->setHash('sha256');
             $privateKey->setMGFHash('sha256');