diff --git a/src/ncc/Classes/NccExtension/ConstantCompiler.php b/src/ncc/Classes/NccExtension/ConstantCompiler.php
index 14cfdcd..62594b8 100644
--- a/src/ncc/Classes/NccExtension/ConstantCompiler.php
+++ b/src/ncc/Classes/NccExtension/ConstantCompiler.php
@@ -150,10 +150,10 @@
 
             return str_replace(
                 [
-                    InstallConstants::INSTALL_PATH,
-                    InstallConstants::INSTALL_PATH_BIN,
-                    InstallConstants::INSTALL_PATH_SRC,
-                    InstallConstants::INSTALL_PATH_DATA
+                    InstallConstants::INSTALL_PATH->value,
+                    InstallConstants::INSTALL_PATH_BIN->value,
+                    InstallConstants::INSTALL_PATH_SRC->value,
+                    InstallConstants::INSTALL_PATH_DATA->value
                 ],
                 [
                     $installation_paths->getInstallationpath(),
diff --git a/src/ncc/Enums/SpecialConstants/InstallConstants.php b/src/ncc/Enums/SpecialConstants/InstallConstants.php
index 34c587e..5e160b5 100644
--- a/src/ncc/Enums/SpecialConstants/InstallConstants.php
+++ b/src/ncc/Enums/SpecialConstants/InstallConstants.php
@@ -22,13 +22,13 @@
 
     namespace ncc\Enums\SpecialConstants;
 
-    final class InstallConstants
+    enum InstallConstants : string
     {
-        public const INSTALL_PATH = '%INSTALL_PATH%';
+        case INSTALL_PATH = '%INSTALL_PATH%';
 
-        public const INSTALL_PATH_BIN = '%INSTALL_PATH.BIN%';
+        case INSTALL_PATH_BIN = '%INSTALL_PATH.BIN%';
 
-        public const INSTALL_PATH_SRC = '%INSTALL_PATH.SRC%';
+        case INSTALL_PATH_SRC = '%INSTALL_PATH.SRC%';
 
-        public const INSTALL_PATH_DATA = '%INSTALL_PATH.DATA%';
+        case INSTALL_PATH_DATA = '%INSTALL_PATH.DATA%';
     }
\ No newline at end of file