diff --git a/composer.json b/composer.json
index 98c7c626..6a3248df 100644
--- a/composer.json
+++ b/composer.json
@@ -12,7 +12,7 @@
   ],
   "require": {
     "php": "^7.4 || ^8.0",
-    "symfony/yaml": "^5.2.5"
+    "symfony/yaml": "^5.3.6"
   },
   "require-dev": {
     "ergebnis/composer-normalize": "^2.15.0",
diff --git a/composer.lock b/composer.lock
index 88adb0f6..f8b30579 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": "e064873f048086e17948f5d9b62e42b9",
+    "content-hash": "60164acae888449d2e3cce840e50ec06",
     "packages": [
         {
             "name": "symfony/deprecation-contracts",
@@ -154,16 +154,16 @@
         },
         {
             "name": "symfony/yaml",
-            "version": "v5.2.5",
+            "version": "v5.3.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "298a08ddda623485208506fcee08817807a251dd"
+                "reference": "4500fe63dc9c6ffc32d3b1cb0448c329f9c814b7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/298a08ddda623485208506fcee08817807a251dd",
-                "reference": "298a08ddda623485208506fcee08817807a251dd",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/4500fe63dc9c6ffc32d3b1cb0448c329f9c814b7",
+                "reference": "4500fe63dc9c6ffc32d3b1cb0448c329f9c814b7",
                 "shasum": ""
             },
             "require": {
@@ -209,7 +209,7 @@
             "description": "Loads and dumps YAML files",
             "homepage": "https://symfony.com",
             "support": {
-                "source": "https://github.com/symfony/yaml/tree/v5.2.5"
+                "source": "https://github.com/symfony/yaml/tree/v5.3.6"
             },
             "funding": [
                 {
@@ -225,7 +225,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2021-03-06T07:59:01+00:00"
+            "time": "2021-07-29T06:20:01+00:00"
         }
     ],
     "packages-dev": [