diff --git a/composer.json b/composer.json
index 017d10f..7447076 100644
--- a/composer.json
+++ b/composer.json
@@ -10,14 +10,27 @@
         }
     ],
     "require": {
-        "php": ">=7.0"
+        "php": "^8.0"
     },
     "suggest": {
-        "ext-primemodule": "Install the native C++ extension for extremely fast factorization (https://github.com/danog/PrimeModule-ext)"
+        "ext-primemodule": "Install the native C++ extension for extremely fast factorization (https://prime.madelineproto.xyz)"
     },
     "autoload": {
         "psr-0": {
             "danog\\": "lib/"
         }
+    },
+    "config": {
+        "allow-plugins": {
+            "phabel/phabel": true
+        }
+    },
+    "require-dev": {
+        "phabel/phabel": "^1"
+    },
+    "extra": {
+        "phabel": {
+            "revision": 0
+        }
     }
 }
diff --git a/lib/danog/PrimeModule.php b/lib/danog/PrimeModule.php
index f2afacc..0a11ec2 100644
--- a/lib/danog/PrimeModule.php
+++ b/lib/danog/PrimeModule.php
@@ -218,13 +218,14 @@ class PrimeModule
         return $res;
     }
 
+    private static ?FFI $ffi = null;
     public static function native_single_cpp($what)
     {
         if (!extension_loaded('primemodule')) {
             if (class_exists(FFI::class)) {
                 try {
-                    $ffi = FFI::load('/usr/include/primemodule-ffi.h');
-                    $result = $ffi->factorizeFFI((string) $what);
+                    self::$ffi = FFI::load('/usr/include/primemodule-ffi.h');
+                    $result = self::$ffi->factorizeFFI((string) $what);
                     if ($result > 0) {
                         return $result;
                     }