diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 58a25e9..5ff9b6f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-version: [ 7.4, 8.0, 8.1 ]
+        php-version: [ 8.0, 8.1 ]
 
     steps:
       - name: Checkout source code
diff --git a/composer.json b/composer.json
index 96cd0d8..90cf7f8 100644
--- a/composer.json
+++ b/composer.json
@@ -11,12 +11,12 @@
   ],
   "minimum-stability": "stable",
   "require": {
-    "php": "^7.4|^8.0|^8.1",
-    "ext-json": "*",
-    "complex-heart/domain-model": "^1.0.0"
+    "php": "^8.0.2",
+    "complex-heart/domain-model": "^2.0.0",
+    "ext-json": "*"
   },
   "require-dev": {
-    "phpstan/phpstan": "^0.12.64",
+    "phpstan/phpstan": "^1.9.0",
     "pestphp/pest": "^1.4"
   },
   "autoload": {
diff --git a/src/Domain/Criteria.php b/src/Domain/Criteria.php
index 8aff547..b515d05 100644
--- a/src/Domain/Criteria.php
+++ b/src/Domain/Criteria.php
@@ -17,11 +17,11 @@ final class Criteria implements ValueObject
 {
     use IsValueObject;
 
-    private FilterGroup $filters;
+    private FilterGroup $filters; // @phpstan-ignore-line
 
-    private Order $order;
+    private Order $order; // @phpstan-ignore-line
 
-    private Page $page;
+    private Page $page; // @phpstan-ignore-line
 
     /**
      * Criteria constructor.
diff --git a/src/Domain/Filter.php b/src/Domain/Filter.php
index 0873961..a240a66 100644
--- a/src/Domain/Filter.php
+++ b/src/Domain/Filter.php
@@ -22,21 +22,21 @@ final class Filter implements ValueObject
      *
      * @var string
      */
-    private string $field;
+    private string $field; // @phpstan-ignore-line
 
     /**
      * The filter operator.
      *
      * @var Operator
      */
-    private Operator $operator;
+    private Operator $operator; // @phpstan-ignore-line
 
     /**
      * The filter field value.
      *
      * @var mixed
      */
-    private $value;
+    private $value; // @phpstan-ignore-line
 
     /**
      * Filter constructor.
@@ -67,7 +67,7 @@ public static function create(string $field, Operator $operator, $value): self
     public static function createFromArray(array $filter): self
     {
         // check if the array is indexed or associative.
-        $isIndexed = fn($source): bool => !([] === $source) && array_keys($source) === range(0, count($source) - 1);
+        $isIndexed = fn($source): bool => ([] !== $source) && array_keys($source) === range(0, count($source) - 1);
 
         return ($isIndexed($filter))
             ? self::create($filter[0], new Operator($filter[1]), $filter[2])
diff --git a/src/Domain/Order.php b/src/Domain/Order.php
index 7bf99a7..941e4d2 100644
--- a/src/Domain/Order.php
+++ b/src/Domain/Order.php
@@ -27,7 +27,7 @@ final class Order implements ValueObject
      *
      * @var string
      */
-    private string $by;
+    private string $by; // @phpstan-ignore-line
 
     /**
      * Used to sort the result-set in ascending or descending order.
@@ -35,7 +35,7 @@ final class Order implements ValueObject
      *
      * @var string
      */
-    private string $type;
+    private string $type; // @phpstan-ignore-line
 
     /**
      * Order constructor.
diff --git a/src/Domain/Page.php b/src/Domain/Page.php
index 1de56d6..fcb6f14 100644
--- a/src/Domain/Page.php
+++ b/src/Domain/Page.php
@@ -18,9 +18,9 @@ final class Page implements ValueObject
 {
     use IsValueObject;
 
-    private int $limit;
+    private int $limit; // @phpstan-ignore-line
 
-    private int $offset;
+    private int $offset; // @phpstan-ignore-line
 
     /**
      * Page constructor.
@@ -62,4 +62,4 @@ public function __toString(): string
     {
         return sprintf('%s.%s', $this->limit, $this->offset);
     }
-}
\ No newline at end of file
+}