diff --git a/lam/composer.json b/lam/composer.json
index 4943a8a4a..ee99804b9 100644
--- a/lam/composer.json
+++ b/lam/composer.json
@@ -17,7 +17,7 @@
 
     "phpmailer/phpmailer": "^7",
 
-    "phpseclib/phpseclib": "^3.0",
+    "phpseclib/phpseclib": "^4.0",
     "paragonie/random_compat": "^2.0",
 
     "christian-riesen/base32": "^2",
diff --git a/lam/composer.lock b/lam/composer.lock
index 181f0feea..645e04a23 100644
--- a/lam/composer.lock
+++ b/lam/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": "8b6abda1ac8721f940f1ccfa1902029c",
+    "content-hash": "70202ed6bdf7d3ab062c94646a9c161f",
     "packages": [
         {
             "name": "aws/aws-crt-php",
@@ -2287,31 +2287,35 @@
         },
         {
             "name": "phpseclib/phpseclib",
-            "version": "3.0.55",
+            "version": "4.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpseclib/phpseclib.git",
-                "reference": "db9744e6d47e742b1f974e965ad49bdd041105af"
+                "reference": "86669f07ca2ed75357329c910064a72c8ad1f507"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpseclib/phpseclib/zipball/db9744e6d47e742b1f974e965ad49bdd041105af",
-                "reference": "db9744e6d47e742b1f974e965ad49bdd041105af",
+                "url": "https://api.github.com/repos/phpseclib/phpseclib/zipball/86669f07ca2ed75357329c910064a72c8ad1f507",
+                "reference": "86669f07ca2ed75357329c910064a72c8ad1f507",
                 "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",
@@ -2320,7 +2324,7 @@
                     "phpseclib/bootstrap.php"
                 ],
                 "psr-4": {
-                    "phpseclib3\\": "phpseclib/"
+                    "phpseclib4\\": "phpseclib/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -2352,10 +2356,16 @@
                     "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",
@@ -2377,7 +2387,7 @@
             ],
             "support": {
                 "issues": "https://github.com/phpseclib/phpseclib/issues",
-                "source": "https://github.com/phpseclib/phpseclib/tree/3.0.55"
+                "source": "https://github.com/phpseclib/phpseclib/tree/4.0.0"
             },
             "funding": [
                 {
@@ -2393,7 +2403,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2026-06-14T23:24:10+00:00"
+            "time": "2026-08-23T03:21:49+00:00"
         },
         {
             "name": "phpstan/phpdoc-parser",
@@ -6794,5 +6804,5 @@
     "platform-overrides": {
         "php": "8.2"
     },
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.9.0"
 }