diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 4208b5c..ac03171 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.6.0"
+  ".": "0.6.1"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 359b96c..a79ac35 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## 0.6.1 (2026-02-27)
+
+Full Changelog: [v0.6.0...v0.6.1](https://github.com/CASParser/cas-parser-php/compare/v0.6.0...v0.6.1)
+
+### Chores
+
+* **internal:** upgrade phpunit ([6aae9d0](https://github.com/CASParser/cas-parser-php/commit/6aae9d0dbaf7cba07bf7f05db9e306541bf122f2))
+
 ## 0.6.0 (2026-02-23)
 
 Full Changelog: [v0.5.0...v0.6.0](https://github.com/CASParser/cas-parser-php/compare/v0.5.0...v0.6.0)
diff --git a/composer.lock b/composer.lock
index 3f6c209..7a5e63d 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": "5fc63f7c84d94b42416689723c547f69",
+  "content-hash": "ffa287ea8babf60e021f37e62c6c207a",
   "packages": [
     {
       "name": "php-http/discovery",
@@ -194,16 +194,16 @@
   "packages-dev": [
     {
       "name": "brianium/paratest",
-      "version": "v7.8.4",
+      "version": "v7.8.5",
       "source": {
         "type": "git",
         "url": "https://github.com/paratestphp/paratest.git",
-        "reference": "130a9bf0e269ee5f5b320108f794ad03e275cad4"
+        "reference": "9b324c8fc319cf9728b581c7a90e1c8f6361c5e5"
       },
       "dist": {
         "type": "zip",
-        "url": "https://api.github.com/repos/paratestphp/paratest/zipball/130a9bf0e269ee5f5b320108f794ad03e275cad4",
-        "reference": "130a9bf0e269ee5f5b320108f794ad03e275cad4",
+        "url": "https://api.github.com/repos/paratestphp/paratest/zipball/9b324c8fc319cf9728b581c7a90e1c8f6361c5e5",
+        "reference": "9b324c8fc319cf9728b581c7a90e1c8f6361c5e5",
         "shasum": ""
       },
       "require": {
@@ -211,27 +211,27 @@
         "ext-pcre": "*",
         "ext-reflection": "*",
         "ext-simplexml": "*",
-        "fidry/cpu-core-counter": "^1.2.0",
+        "fidry/cpu-core-counter": "^1.3.0",
         "jean85/pretty-package-versions": "^2.1.1",
-        "php": "~8.2.0 || ~8.3.0 || ~8.4.0",
-        "phpunit/php-code-coverage": "^11.0.10",
+        "php": "~8.2.0 || ~8.3.0 || ~8.4.0 || ~8.5.0",
+        "phpunit/php-code-coverage": "^11.0.12",
         "phpunit/php-file-iterator": "^5.1.0",
         "phpunit/php-timer": "^7.0.1",
-        "phpunit/phpunit": "^11.5.24",
+        "phpunit/phpunit": "^11.5.46",
         "sebastian/environment": "^7.2.1",
-        "symfony/console": "^6.4.22 || ^7.3.0",
-        "symfony/process": "^6.4.20 || ^7.3.0"
+        "symfony/console": "^6.4.22 || ^7.3.4 || ^8.0.3",
+        "symfony/process": "^6.4.20 || ^7.3.4 || ^8.0.3"
       },
       "require-dev": {
         "doctrine/coding-standard": "^12.0.0",
         "ext-pcov": "*",
         "ext-posix": "*",
-        "phpstan/phpstan": "^2.1.17",
+        "phpstan/phpstan": "^2.1.33",
         "phpstan/phpstan-deprecation-rules": "^2.0.3",
-        "phpstan/phpstan-phpunit": "^2.0.6",
-        "phpstan/phpstan-strict-rules": "^2.0.4",
-        "squizlabs/php_codesniffer": "^3.13.2",
-        "symfony/filesystem": "^6.4.13 || ^7.3.0"
+        "phpstan/phpstan-phpunit": "^2.0.11",
+        "phpstan/phpstan-strict-rules": "^2.0.7",
+        "squizlabs/php_codesniffer": "^3.13.5",
+        "symfony/filesystem": "^6.4.13 || ^7.3.2 || ^8.0.1"
       },
       "bin": [
         "bin/paratest",
@@ -271,7 +271,7 @@
       ],
       "support": {
         "issues": "https://github.com/paratestphp/paratest/issues",
-        "source": "https://github.com/paratestphp/paratest/tree/v7.8.4"
+        "source": "https://github.com/paratestphp/paratest/tree/v7.8.5"
       },
       "funding": [
         {
@@ -283,7 +283,7 @@
           "type": "paypal"
         }
       ],
-      "time": "2025-06-23T06:07:21+00:00"
+      "time": "2026-01-08T08:02:38+00:00"
     },
     {
       "name": "clue/ndjson-react",
@@ -1412,38 +1412,38 @@
     },
     {
       "name": "pestphp/pest",
-      "version": "v3.8.4",
+      "version": "v3.8.5",
       "source": {
         "type": "git",
         "url": "https://github.com/pestphp/pest.git",
-        "reference": "72cf695554420e21858cda831d5db193db102574"
+        "reference": "7796630eafcfd1c02660cecdde3bc6984fbf01f4"
       },
       "dist": {
         "type": "zip",
-        "url": "https://api.github.com/repos/pestphp/pest/zipball/72cf695554420e21858cda831d5db193db102574",
-        "reference": "72cf695554420e21858cda831d5db193db102574",
+        "url": "https://api.github.com/repos/pestphp/pest/zipball/7796630eafcfd1c02660cecdde3bc6984fbf01f4",
+        "reference": "7796630eafcfd1c02660cecdde3bc6984fbf01f4",
         "shasum": ""
       },
       "require": {
-        "brianium/paratest": "^7.8.4",
-        "nunomaduro/collision": "^8.8.2",
-        "nunomaduro/termwind": "^2.3.1",
+        "brianium/paratest": "^7.8.5",
+        "nunomaduro/collision": "^8.8.3",
+        "nunomaduro/termwind": "^2.3.3",
         "pestphp/pest-plugin": "^3.0.0",
         "pestphp/pest-plugin-arch": "^3.1.1",
         "pestphp/pest-plugin-mutate": "^3.0.5",
         "php": "^8.2.0",
-        "phpunit/phpunit": "^11.5.33"
+        "phpunit/phpunit": "^11.5.50"
       },
       "conflict": {
         "filp/whoops": "<2.16.0",
-        "phpunit/phpunit": ">11.5.33",
+        "phpunit/phpunit": ">11.5.50",
         "sebastian/exporter": "<6.0.0",
         "webmozart/assert": "<1.11.0"
       },
       "require-dev": {
         "pestphp/pest-dev-tools": "^3.4.0",
         "pestphp/pest-plugin-type-coverage": "^3.6.1",
-        "symfony/process": "^7.3.0"
+        "symfony/process": "^7.4.4"
       },
       "bin": [
         "bin/pest"
@@ -1508,7 +1508,7 @@
       ],
       "support": {
         "issues": "https://github.com/pestphp/pest/issues",
-        "source": "https://github.com/pestphp/pest/tree/v3.8.4"
+        "source": "https://github.com/pestphp/pest/tree/v3.8.5"
       },
       "funding": [
         {
@@ -1520,7 +1520,7 @@
           "type": "github"
         }
       ],
-      "time": "2025-08-20T19:12:42+00:00"
+      "time": "2026-01-28T01:33:45+00:00"
     },
     {
       "name": "pestphp/pest-plugin",
@@ -2627,28 +2627,28 @@
     },
     {
       "name": "phpunit/php-file-iterator",
-      "version": "5.1.0",
+      "version": "5.1.1",
       "source": {
         "type": "git",
         "url": "https://github.com/sebastianbergmann/php-file-iterator.git",
-        "reference": "118cfaaa8bc5aef3287bf315b6060b1174754af6"
+        "reference": "2f3a64888c814fc235386b7387dd5b5ed92ad903"
       },
       "dist": {
         "type": "zip",
-        "url": "https://api.github.com/repos/sebastianbergmann/php-file-iterator/zipball/118cfaaa8bc5aef3287bf315b6060b1174754af6",
-        "reference": "118cfaaa8bc5aef3287bf315b6060b1174754af6",
+        "url": "https://api.github.com/repos/sebastianbergmann/php-file-iterator/zipball/2f3a64888c814fc235386b7387dd5b5ed92ad903",
+        "reference": "2f3a64888c814fc235386b7387dd5b5ed92ad903",
         "shasum": ""
       },
       "require": {
         "php": ">=8.2"
       },
       "require-dev": {
-        "phpunit/phpunit": "^11.0"
+        "phpunit/phpunit": "^11.3"
       },
       "type": "library",
       "extra": {
         "branch-alias": {
-          "dev-main": "5.0-dev"
+          "dev-main": "5.1-dev"
         }
       },
       "autoload": {
@@ -2676,15 +2676,27 @@
       "support": {
         "issues": "https://github.com/sebastianbergmann/php-file-iterator/issues",
         "security": "https://github.com/sebastianbergmann/php-file-iterator/security/policy",
-        "source": "https://github.com/sebastianbergmann/php-file-iterator/tree/5.1.0"
+        "source": "https://github.com/sebastianbergmann/php-file-iterator/tree/5.1.1"
       },
       "funding": [
         {
           "url": "https://github.com/sebastianbergmann",
           "type": "github"
+        },
+        {
+          "url": "https://liberapay.com/sebastianbergmann",
+          "type": "liberapay"
+        },
+        {
+          "url": "https://thanks.dev/u/gh/sebastianbergmann",
+          "type": "thanks_dev"
+        },
+        {
+          "url": "https://tidelift.com/funding/github/packagist/phpunit/php-file-iterator",
+          "type": "tidelift"
         }
       ],
-      "time": "2024-08-27T05:02:59+00:00"
+      "time": "2026-02-02T13:52:54+00:00"
     },
     {
       "name": "phpunit/php-invoker",
@@ -2872,16 +2884,16 @@
     },
     {
       "name": "phpunit/phpunit",
-      "version": "11.5.33",
+      "version": "11.5.50",
       "source": {
         "type": "git",
         "url": "https://github.com/sebastianbergmann/phpunit.git",
-        "reference": "5965e9ff57546cb9137c0ff6aa78cb7442b05cf6"
+        "reference": "fdfc727f0fcacfeb8fcb30c7e5da173125b58be3"
       },
       "dist": {
         "type": "zip",
-        "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/5965e9ff57546cb9137c0ff6aa78cb7442b05cf6",
-        "reference": "5965e9ff57546cb9137c0ff6aa78cb7442b05cf6",
+        "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/fdfc727f0fcacfeb8fcb30c7e5da173125b58be3",
+        "reference": "fdfc727f0fcacfeb8fcb30c7e5da173125b58be3",
         "shasum": ""
       },
       "require": {
@@ -2895,17 +2907,17 @@
         "phar-io/manifest": "^2.0.4",
         "phar-io/version": "^3.2.1",
         "php": ">=8.2",
-        "phpunit/php-code-coverage": "^11.0.10",
+        "phpunit/php-code-coverage": "^11.0.12",
         "phpunit/php-file-iterator": "^5.1.0",
         "phpunit/php-invoker": "^5.0.1",
         "phpunit/php-text-template": "^4.0.1",
         "phpunit/php-timer": "^7.0.1",
         "sebastian/cli-parser": "^3.0.2",
         "sebastian/code-unit": "^3.0.3",
-        "sebastian/comparator": "^6.3.2",
+        "sebastian/comparator": "^6.3.3",
         "sebastian/diff": "^6.0.2",
         "sebastian/environment": "^7.2.1",
-        "sebastian/exporter": "^6.3.0",
+        "sebastian/exporter": "^6.3.2",
         "sebastian/global-state": "^7.0.2",
         "sebastian/object-enumerator": "^6.0.1",
         "sebastian/type": "^5.1.3",
@@ -2953,7 +2965,7 @@
       "support": {
         "issues": "https://github.com/sebastianbergmann/phpunit/issues",
         "security": "https://github.com/sebastianbergmann/phpunit/security/policy",
-        "source": "https://github.com/sebastianbergmann/phpunit/tree/11.5.33"
+        "source": "https://github.com/sebastianbergmann/phpunit/tree/11.5.50"
       },
       "funding": [
         {
@@ -2977,7 +2989,7 @@
           "type": "tidelift"
         }
       ],
-      "time": "2025-08-16T05:19:02+00:00"
+      "time": "2026-01-27T05:59:18+00:00"
     },
     {
       "name": "psr/container",
@@ -3936,16 +3948,16 @@
     },
     {
       "name": "sebastian/comparator",
-      "version": "6.3.2",
+      "version": "6.3.3",
       "source": {
         "type": "git",
         "url": "https://github.com/sebastianbergmann/comparator.git",
-        "reference": "85c77556683e6eee4323e4c5468641ca0237e2e8"
+        "reference": "2c95e1e86cb8dd41beb8d502057d1081ccc8eca9"
       },
       "dist": {
         "type": "zip",
-        "url": "https://api.github.com/repos/sebastianbergmann/comparator/zipball/85c77556683e6eee4323e4c5468641ca0237e2e8",
-        "reference": "85c77556683e6eee4323e4c5468641ca0237e2e8",
+        "url": "https://api.github.com/repos/sebastianbergmann/comparator/zipball/2c95e1e86cb8dd41beb8d502057d1081ccc8eca9",
+        "reference": "2c95e1e86cb8dd41beb8d502057d1081ccc8eca9",
         "shasum": ""
       },
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@@ -4004,7 +4016,7 @@
       "support": {
         "issues": "https://github.com/sebastianbergmann/comparator/issues",
         "security": "https://github.com/sebastianbergmann/comparator/security/policy",
-        "source": "https://github.com/sebastianbergmann/comparator/tree/6.3.2"
+        "source": "https://github.com/sebastianbergmann/comparator/tree/6.3.3"
       },
       "funding": [
         {
@@ -4024,7 +4036,7 @@
           "type": "tidelift"
         }
       ],
-      "time": "2025-08-10T08:07:46+00:00"
+      "time": "2026-01-24T09:26:40+00:00"
     },
     {
       "name": "sebastian/complexity",
@@ -6668,5 +6680,5 @@
   "platform-overrides": {
     "php": "8.3"
   },
-  "plugin-api-version": "2.6.0"
+  "plugin-api-version": "2.9.0"
 }
diff --git a/src/Version.php b/src/Version.php
index 2ffda3d..1ab3ce7 100644
--- a/src/Version.php
+++ b/src/Version.php
@@ -5,5 +5,5 @@
 namespace CasParser;
 
 // x-release-please-start-version
-const VERSION = '0.6.0';
+const VERSION = '0.6.1';
 // x-release-please-end