diff --git a/.github/workflows /check.yml b/.github/workflows/check.yml
similarity index 100%
rename from .github/workflows /check.yml
rename to .github/workflows/check.yml
diff --git a/.github/workflows/first.yml b/.github/workflows/first.yml
deleted file mode 100644
index 198cecf..0000000
--- a/.github/workflows/first.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-name: Release
-
-on:
-  push:
-    branches: [ main ]
-
-
-jobs:
-  verify_and_tag:
-    runs-on: ubuntu-latest
-    steps:
-      - name: First interaction
-        uses: actions/first-interaction@v1.3.0
-                
diff --git a/.github/workflows /release.yml b/.github/workflows/release.yml
similarity index 100%
rename from .github/workflows /release.yml
rename to .github/workflows/release.yml
diff --git a/VERSION b/VERSION
index 8acdd82..bc3b3c9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.0.1
+0.0.1alpha1
diff --git a/composer.json b/composer.json
index 5fc8096..c4f20ec 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,6 @@
   "name": "fallegahq/json-test-utils",
   "description": "JSON testing utilities for PHPUnit 11+",
   "type": "library",
-  "version": "0.0.2",
   "require": {
     "php": "^8.2",
     "phpunit/phpunit": "^11"
diff --git a/composer.lock b/composer.lock
index 80c11ee..9d6fe89 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": "9be90141285e7b55e77c2e832c925658",
+    "content-hash": "ce0f8c9bfc2ffd838ae20180a3c1e4ba",
     "packages": [
         {
             "name": "myclabs/deep-copy",
diff --git a/src/JsonValidationException.php b/src/JsonValidationException.php
index a399a8f..33f9574 100644
--- a/src/JsonValidationException.php
+++ b/src/JsonValidationException.php
@@ -11,7 +11,7 @@
 class JsonValidationException extends InvalidArgumentException {
     protected array $errors = [];
 
-    public function __construct(string $message = '', array $errors = [], int $code = 0, Throwable $previous = null) {
+    public function __construct(string $message = '', array $errors = [], int $code = 0, ?Throwable $previous = null) {
         $this->errors = $errors;
         parent::__construct($message, $code, $previous);
     }