diff --git a/platforms/wordpress/gantry5/composer.json b/platforms/wordpress/gantry5/composer.json
index 8735fa00f..20c0e8cfc 100644
--- a/platforms/wordpress/gantry5/composer.json
+++ b/platforms/wordpress/gantry5/composer.json
@@ -6,7 +6,7 @@
     "require": {
         "php": ">=5.6.20",
         "symfony/event-dispatcher": "~3.4",
-        "symfony/yaml": "~3.4",
+        "symfony/yaml": "5.4.0",
         "pimple/pimple": "~3.2",
         "filp/whoops": "~2.5",
         "rockettheme/toolbox": "~1.5",
diff --git a/platforms/wordpress/gantry5/composer.lock b/platforms/wordpress/gantry5/composer.lock
index 5d5070300..bf43bd7ed 100644
--- a/platforms/wordpress/gantry5/composer.lock
+++ b/platforms/wordpress/gantry5/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": "570caa196fda8bcd0a5c5bb16da9c95d",
+    "content-hash": "8c92ac528f93d34a0f5b21eb6746b2f2",
     "packages": [
         {
             "name": "altorouter/altorouter",
@@ -755,6 +755,73 @@
             },
             "time": "2022-01-06T18:16:18+00:00"
         },
+        {
+            "name": "symfony/deprecation-contracts",
+            "version": "v2.5.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/deprecation-contracts.git",
+                "reference": "e8b495ea28c1d97b5e0c121748d6f9b53d075c66"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/deprecation-contracts/zipball/e8b495ea28c1d97b5e0c121748d6f9b53d075c66",
+                "reference": "e8b495ea28c1d97b5e0c121748d6f9b53d075c66",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "2.5-dev"
+                },
+                "thanks": {
+                    "name": "symfony/contracts",
+                    "url": "https://github.com/symfony/contracts"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "function.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "A generic function and convention to trigger deprecation notices",
+            "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/deprecation-contracts/tree/v2.5.2"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-01-02T09:53:40+00:00"
+        },
         {
             "name": "symfony/event-dispatcher",
             "version": "v3.4.47",
@@ -915,31 +982,35 @@
         },
         {
             "name": "symfony/yaml",
-            "version": "v3.4.47",
+            "version": "v5.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "88289caa3c166321883f67fe5130188ebbb47094"
+                "reference": "034ccc0994f1ae3f7499fa5b1f2e75d5e7a94efc"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/88289caa3c166321883f67fe5130188ebbb47094",
-                "reference": "88289caa3c166321883f67fe5130188ebbb47094",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/034ccc0994f1ae3f7499fa5b1f2e75d5e7a94efc",
+                "reference": "034ccc0994f1ae3f7499fa5b1f2e75d5e7a94efc",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.5.9|>=7.0.8",
-                "symfony/polyfill-ctype": "~1.8"
+                "php": ">=7.2.5",
+                "symfony/deprecation-contracts": "^2.1|^3",
+                "symfony/polyfill-ctype": "^1.8"
             },
             "conflict": {
-                "symfony/console": "<3.4"
+                "symfony/console": "<5.3"
             },
             "require-dev": {
-                "symfony/console": "~3.4|~4.0"
+                "symfony/console": "^5.3|^6.0"
             },
             "suggest": {
                 "symfony/console": "For validating YAML files using the lint command"
             },
+            "bin": [
+                "Resources/bin/yaml-lint"
+            ],
             "type": "library",
             "autoload": {
                 "psr-4": {
@@ -963,10 +1034,10 @@
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Symfony Yaml Component",
+            "description": "Loads and dumps YAML files",
             "homepage": "https://symfony.com",
             "support": {
-                "source": "https://github.com/symfony/yaml/tree/v3.4.47"
+                "source": "https://github.com/symfony/yaml/tree/v5.4.0"
             },
             "funding": [
                 {
@@ -982,7 +1053,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2020-10-24T10:57:07+00:00"
+            "time": "2021-11-28T15:25:38+00:00"
         },
         {
             "name": "timber/timber",