From eb971aaaac8804f97e076a2d2d00e30e490958da Mon Sep 17 00:00:00 2001
From: terrafrost <terrafrost@gmail.com>
Date: Fri, 18 Mar 2022 12:47:40 -0500
Subject: [PATCH] BigInteger: fix deprecation notice

---
 phpseclib/Math/BigInteger.php                 | 1 +
 phpseclib/Math/BigInteger/Engines/Engine.php  | 1 +
 phpseclib/Math/Common/FiniteField/Integer.php | 1 +
 3 files changed, 3 insertions(+)

diff --git a/phpseclib/Math/BigInteger.php b/phpseclib/Math/BigInteger.php
index adf50838..c7b997cb 100644
--- a/phpseclib/Math/BigInteger.php
+++ b/phpseclib/Math/BigInteger.php
@@ -443,6 +443,7 @@ class BigInteger implements \JsonSerializable
      *
      * Will be called, automatically, when json_encode() is called on a BigInteger object.
      */
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         $result = ['hex' => $this->toHex(true)];
diff --git a/phpseclib/Math/BigInteger/Engines/Engine.php b/phpseclib/Math/BigInteger/Engines/Engine.php
index fe6bff80..a332c5c1 100644
--- a/phpseclib/Math/BigInteger/Engines/Engine.php
+++ b/phpseclib/Math/BigInteger/Engines/Engine.php
@@ -376,6 +376,7 @@ abstract class Engine implements \JsonSerializable
      *
      * Will be called, automatically, when json_encode() is called on a BigInteger object.
      */
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         $result = ['hex' => $this->toHex(true)];
diff --git a/phpseclib/Math/Common/FiniteField/Integer.php b/phpseclib/Math/Common/FiniteField/Integer.php
index 120026e7..cd980273 100644
--- a/phpseclib/Math/Common/FiniteField/Integer.php
+++ b/phpseclib/Math/Common/FiniteField/Integer.php
@@ -31,6 +31,7 @@ abstract class Integer implements \JsonSerializable
      * PHP Serialize isn't supported because unserializing would require the factory be
      * serialized as well and that just sounds like too much
      */
+    #[\ReturnTypeWillChange]
     public function jsonSerialize()
     {
         return ['hex' => $this->toHex(true)];