diff --git a/composer.json b/composer.json
index 7687002b4..57c04e477 100644
--- a/composer.json
+++ b/composer.json
@@ -40,7 +40,7 @@
     "php": "~8.4 || ~8.5",
     "defuse/php-encryption": "^2.1",
     "phpmailer/phpmailer": "^7.0",
-    "phpseclib/phpseclib": "^3.0",
+    "phpseclib/phpseclib": "^4.0",
     "php-di/php-di": "^7.1",
     "guzzlehttp/guzzle": "^8.0",
     "monolog/monolog": "^3.0",
diff --git a/composer.lock b/composer.lock
index 5557251dd..9124c2f85 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": "2ac53d9e682af0371201a2e861f34e63",
+    "content-hash": "2ad51454065ff57ce8ecda51bca87479",
     "packages": [
         {
             "name": "aura/sqlquery",
@@ -1242,31 +1242,35 @@
         },
         {
             "name": "phpseclib/phpseclib",
-            "version": "3.0.56",
+            "version": "4.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpseclib/phpseclib.git",
-                "reference": "7adbbe38cde25e2df2116dbf2673c407e24fa305"
+                "reference": "bb7b959c8159957edae6f5084ebbac765d310e16"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpseclib/phpseclib/zipball/7adbbe38cde25e2df2116dbf2673c407e24fa305",
-                "reference": "7adbbe38cde25e2df2116dbf2673c407e24fa305",
+                "url": "https://api.github.com/repos/phpseclib/phpseclib/zipball/bb7b959c8159957edae6f5084ebbac765d310e16",
+                "reference": "bb7b959c8159957edae6f5084ebbac765d310e16",
                 "shasum": ""
             },
             "require": {
-                "paragonie/constant_time_encoding": "^1|^2|^3",
-                "paragonie/random_compat": "^1.4|^2.0|^9.99.99",
-                "php": ">=5.6.1"
+                "paragonie/constant_time_encoding": "^2|^3",
+                "php": ">=8.1",
+                "symfony/polyfill-php82": "^1.26"
             },
             "require-dev": {
-                "phpunit/phpunit": "*"
+                "brianium/paratest": "^7.22",
+                "ext-xml": "*",
+                "php-parallel-lint/php-parallel-lint": "^1.3",
+                "phpunit/phpunit": "^13",
+                "squizlabs/php_codesniffer": "^3.7",
+                "vimeo/psalm": "*"
             },
             "suggest": {
                 "ext-dom": "Install the DOM extension to load XML formatted public keys.",
                 "ext-gmp": "Install the GMP (GNU Multiple Precision) extension in order to speed up arbitrary precision integer arithmetic operations.",
                 "ext-libsodium": "SSH2/SFTP can make use of some algorithms provided by the libsodium-php extension.",
-                "ext-mcrypt": "Install the Mcrypt extension in order to speed up a few other cryptographic operations.",
                 "ext-openssl": "Install the OpenSSL extension in order to speed up a wide variety of cryptographic operations."
             },
             "type": "library",
@@ -1275,7 +1279,7 @@
                     "phpseclib/bootstrap.php"
                 ],
                 "psr-4": {
-                    "phpseclib3\\": "phpseclib/"
+                    "phpseclib4\\": "phpseclib/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -1307,10 +1311,16 @@
                     "name": "Graham Campbell",
                     "email": "graham@alt-three.com",
                     "role": "Developer"
+                },
+                {
+                    "name": "Jack Worman",
+                    "email": "jack.worman@gmail.com",
+                    "homepage": "https://jackworman.com",
+                    "role": "Developer"
                 }
             ],
             "description": "PHP Secure Communications Library - Pure-PHP implementations of RSA, AES, SSH2, SFTP, X.509 etc.",
-            "homepage": "http://phpseclib.sourceforge.net",
+            "homepage": "https://phpseclib.com/",
             "keywords": [
                 "BigInteger",
                 "aes",
@@ -1332,7 +1342,7 @@
             ],
             "support": {
                 "issues": "https://github.com/phpseclib/phpseclib/issues",
-                "source": "https://github.com/phpseclib/phpseclib/tree/3.0.56"
+                "source": "https://github.com/phpseclib/phpseclib/tree/4.0.1"
             },
             "funding": [
                 {
@@ -1348,7 +1358,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2026-08-03T04:36:50+00:00"
+            "time": "2026-08-26T12:15:13+00:00"
         },
         {
             "name": "psr/container",