diff --git a/composer.json b/composer.json
index df6b7bf..570fab2 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
         "ext-json": "*",
         "roave/security-advisories": "dev-latest",
         "phpunit/phpunit": "10.5.64",
-        "squizlabs/php_codesniffer": "4.0.1"
+        "squizlabs/php_codesniffer": "4.0.4"
     },
     "autoload": {
         "psr-4": {
diff --git a/composer.lock b/composer.lock
index dcbdda5..987ca03 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": "a40438eff0ae7c696dcb164941f8998a",
+    "content-hash": "537303bf972255bc6db950470651753f",
     "packages": [
         {
             "name": "personnummer/personnummer",
@@ -2475,19 +2475,20 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "4.0.1",
+            "version": "4.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHPCSStandards/PHP_CodeSniffer.git",
-                "reference": "0525c73950de35ded110cffafb9892946d7771b5"
+                "reference": "bbdc3d0532623e21838b7041a4364383a8126f96"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHPCSStandards/PHP_CodeSniffer/zipball/0525c73950de35ded110cffafb9892946d7771b5",
-                "reference": "0525c73950de35ded110cffafb9892946d7771b5",
+                "url": "https://api.github.com/repos/PHPCSStandards/PHP_CodeSniffer/zipball/bbdc3d0532623e21838b7041a4364383a8126f96",
+                "reference": "bbdc3d0532623e21838b7041a4364383a8126f96",
                 "shasum": ""
             },
             "require": {
+                "ext-libxml": "*",
                 "ext-simplexml": "*",
                 "ext-tokenizer": "*",
                 "ext-xmlwriter": "*",
@@ -2496,6 +2497,10 @@
             "require-dev": {
                 "phpunit/phpunit": "^8.4.0 || ^9.3.4 || ^10.5.32 || 11.3.3 - 11.5.28 || ^11.5.31"
             },
+            "suggest": {
+                "ext-iconv": "For accurate character length calculation when the checked files contain multi-byte characters.",
+                "ext-pcntl": "For parallel processing support via the --parallel CLI option."
+            },
             "bin": [
                 "bin/phpcbf",
                 "bin/phpcs"
@@ -2550,7 +2555,7 @@
                     "type": "thanks_dev"
                 }
             ],
-            "time": "2025-11-10T16:43:36+00:00"
+            "time": "2026-08-06T02:45:27+00:00"
         },
         {
             "name": "theseer/tokenizer",