diff --git a/README.md b/README.md
index 231783d..2ec30f3 100644
--- a/README.md
+++ b/README.md
@@ -4,12 +4,12 @@
 <!-- Version Badge -->
 <img src="https://img.shields.io/badge/Version-1.0.0-blue" alt="Version 1.0.0">
 <!-- PHP Coverage Badge -->
-<img src="https://img.shields.io/badge/PHP%20Coverage-96.36%25-green" alt="PHP Coverage 96.36%">
+<img src="https://img.shields.io/badge/PHP%20Coverage-92.98%25-green" alt="PHP%20Coverage 92.98%">
 <!-- License Badge -->
 <img src="https://img.shields.io/badge/License-GPL--3.0--or--later-34ad9b" alt="License GPL--3.0--or--later">
 </p>
 
-A PHP package for managing dependencies and dependency injection.
+<p>A PHP package for managing dependencies and dependency injection.</p>
 
 ---
 
diff --git a/composer.json b/composer.json
index 498ad34..2db2346 100644
--- a/composer.json
+++ b/composer.json
@@ -29,6 +29,6 @@
       "email": "daniel@winningsoftware.co.uk"
     }
   ],
-  "version": "1.3.0",
+  "version": "1.0.0",
   "license": "GPL-3.0-or-later"
 }
diff --git a/spinner.yaml b/spinner.yaml
new file mode 100644
index 0000000..916e1f5
--- /dev/null
+++ b/spinner.yaml
@@ -0,0 +1,6 @@
+options:
+  environment:
+    server:
+      enabled: false
+    database:
+      enabled: false
\ No newline at end of file
diff --git a/src/AbstractParameterResolver.php b/src/AbstractParameterResolver.php
index 430ea54..6ebacf1 100644
--- a/src/AbstractParameterResolver.php
+++ b/src/AbstractParameterResolver.php
@@ -6,5 +6,5 @@ namespace Loom\DependencyInjectionComponent;
 
 abstract class AbstractParameterResolver
 {
-    abstract public function resolve(string $parameter): string|int|array;
+    abstract public function resolve(string $parameter): string|int|array|bool|float|null;
 }
\ No newline at end of file
diff --git a/src/DependencyManager.php b/src/DependencyManager.php
index 49327d4..dd97143 100644
--- a/src/DependencyManager.php
+++ b/src/DependencyManager.php
@@ -6,10 +6,12 @@ namespace Loom\DependencyInjectionComponent;
 
 use Symfony\Component\Yaml\Yaml;
 
-class DependencyManager
+readonly class DependencyManager
 {
-    public function __construct(private DependencyContainer $container, private ?AbstractParameterResolver $parameterResolver = null)
-    {
+    public function __construct(
+        private readonly DependencyContainer $container,
+        private readonly ?AbstractParameterResolver $parameterResolver = null
+    ) {
     }
 
     /**
diff --git a/src/Exception/NotFoundException.php b/src/Exception/NotFoundException.php
index 2c4236f..d8ed16a 100644
--- a/src/Exception/NotFoundException.php
+++ b/src/Exception/NotFoundException.php
@@ -1,17 +1,15 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Loom\DependencyInjectionComponent\Exception;
 
 use Psr\Container\NotFoundExceptionInterface;
 
 class NotFoundException extends \Exception implements NotFoundExceptionInterface
 {
-    public function __construct(string $message = 'Entry not found', int $code = 0, \Throwable $previous = null)
+    public function __construct(string $message = 'Entry not found', int $code = 0, ?\Throwable $previous = null)
     {
         parent::__construct($message, $code, $previous);
     }
-}
-
-
-
-
+}
\ No newline at end of file