diff --git a/src/ncc/Enums/CompilerExtensions.php b/src/ncc/Enums/CompilerExtensions.php
index 0c280d6..04fcc60 100644
--- a/src/ncc/Enums/CompilerExtensions.php
+++ b/src/ncc/Enums/CompilerExtensions.php
@@ -22,11 +22,7 @@
 
     namespace ncc\Enums;
 
-    final class CompilerExtensions
+    enum CompilerExtensions : string
     {
-        public const PHP = 'php';
-
-        public const ALL = [
-            CompilerExtensions::PHP
-        ];
+        case PHP = 'php';
     }
\ No newline at end of file
diff --git a/src/ncc/Managers/ProjectManager.php b/src/ncc/Managers/ProjectManager.php
index e84f69e..c33b5a8 100644
--- a/src/ncc/Managers/ProjectManager.php
+++ b/src/ncc/Managers/ProjectManager.php
@@ -160,7 +160,7 @@
 
             return match (strtolower($this->project_configuration->getProject()->getCompiler()->getExtension()))
             {
-                CompilerExtensions::PHP => match (strtolower($configuration->getBuildType()))
+                CompilerExtensions::PHP->value => match (strtolower($configuration->getBuildType()))
                 {
                     BuildOutputType::NCC_PACKAGE => (new NccCompiler($this))->build($build_configuration, $options),
                     BuildOutputType::EXECUTABLE => (new ExecutableCompiler($this))->build($build_configuration, $options),
@@ -258,7 +258,7 @@
         {
             return match ($this->getProjectConfiguration()->getProject()->getCompiler()->getExtension())
             {
-                CompilerExtensions::PHP => ComponentFileExtensions::PHP,
+                CompilerExtensions::PHP->value => ComponentFileExtensions::PHP,
                 default => throw new NotSupportedException(
                     sprintf('The compiler extension \'%s\' is not supported', $this->getProjectConfiguration()->getProject()->getCompiler()->getExtension())
                 ),
@@ -485,7 +485,7 @@
                 throw new IOException(sprintf('Project source directory "%s" was not created', $project_src));
             }
 
-            $project = new ProjectConfiguration\Project(new ProjectConfiguration\Compiler(CompilerExtensions::PHP));
+            $project = new ProjectConfiguration\Project(new ProjectConfiguration\Compiler(CompilerExtensions::PHP->value));
             $assembly = new ProjectConfiguration\Assembly(
                 Resolver::composerName($composer_json->getName()),
                 Resolver::composerNameToPackage($composer_json->getName()),
diff --git a/src/ncc/Objects/ProjectConfiguration/Compiler.php b/src/ncc/Objects/ProjectConfiguration/Compiler.php
index b2017d5..a118006 100644
--- a/src/ncc/Objects/ProjectConfiguration/Compiler.php
+++ b/src/ncc/Objects/ProjectConfiguration/Compiler.php
@@ -77,7 +77,7 @@
             /** @noinspection DegradedSwitchInspection */
             switch($extension)
             {
-                case CompilerExtensions::PHP:
+                case CompilerExtensions::PHP->value:
 
                     if($minimum_version === null)
                     {
@@ -185,7 +185,8 @@
             }
 
             /** @noinspection InArrayMissUseInspection */
-            if(!in_array($this->extension, CompilerExtensions::ALL, true))
+            // TODO: Fix this, not a proper use of cases()
+            if(!in_array($this->extension, CompilerExtensions::cases(), true))
             {
                 throw new NotSupportedException('The compiler extension \'' . $this->extension . '\' is not supported');
             }