diff --git a/composer.json b/composer.json
index 0a02e19..41653e7 100644
--- a/composer.json
+++ b/composer.json
@@ -18,7 +18,7 @@
         "infection/infection": "0.27.11",
         "phpunit/phpunit": "10.5.15",
         "psalm/plugin-phpunit": "0.19.0",
-        "symplify/easy-coding-standard": "12.1.14",
+        "symplify/easy-coding-standard": "12.3.1",
         "vimeo/psalm": "5.24.0"
     },
     "autoload": {
diff --git a/composer.lock b/composer.lock
index abe53c3..dc2565b 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": "3322230176c514a6213af5173848b5ca",
+    "content-hash": "3d082955aeb3bd62237d0023a38bd651",
     "packages": [
         {
             "name": "prewk/result",
@@ -4811,16 +4811,16 @@
         },
         {
             "name": "symplify/easy-coding-standard",
-            "version": "12.1.14",
+            "version": "12.3.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/easy-coding-standard/easy-coding-standard.git",
-                "reference": "e3c4a241ee36704f7cf920d5931f39693e64afd5"
+                "reference": "bd670feae8d0b6da891d29a3c549bd0f4aa48711"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/easy-coding-standard/easy-coding-standard/zipball/e3c4a241ee36704f7cf920d5931f39693e64afd5",
-                "reference": "e3c4a241ee36704f7cf920d5931f39693e64afd5",
+                "url": "https://api.github.com/repos/easy-coding-standard/easy-coding-standard/zipball/bd670feae8d0b6da891d29a3c549bd0f4aa48711",
+                "reference": "bd670feae8d0b6da891d29a3c549bd0f4aa48711",
                 "shasum": ""
             },
             "require": {
@@ -4831,6 +4831,9 @@
                 "phpcsstandards/php_codesniffer": "<3.8",
                 "symplify/coding-standard": "<12.1"
             },
+            "suggest": {
+                "ext-dom": "Needed to support checkstyle output format in class CheckstyleOutputFormatter"
+            },
             "bin": [
                 "bin/ecs"
             ],
@@ -4853,7 +4856,7 @@
             ],
             "support": {
                 "issues": "https://github.com/easy-coding-standard/easy-coding-standard/issues",
-                "source": "https://github.com/easy-coding-standard/easy-coding-standard/tree/12.1.14"
+                "source": "https://github.com/easy-coding-standard/easy-coding-standard/tree/12.3.1"
             },
             "funding": [
                 {
@@ -4865,7 +4868,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2024-02-23T13:10:40+00:00"
+            "time": "2024-07-06T12:33:15+00:00"
         },
         {
             "name": "thecodingmachine/safe",