diff --git a/Pipes/UnixPipes.php b/Pipes/UnixPipes.php
index 6f95a332..5fbab213 100644
--- a/Pipes/UnixPipes.php
+++ b/Pipes/UnixPipes.php
@@ -31,12 +31,12 @@ public function __construct(
         parent::__construct($input);
     }
 
-    public function __sleep(): array
+    public function __serialize(): array
     {
         throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
     }
 
-    public function __wakeup(): void
+    public function __unserialize(array $data): void
     {
         throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
     }
diff --git a/Pipes/WindowsPipes.php b/Pipes/WindowsPipes.php
index 116b8e30..f4ab195b 100644
--- a/Pipes/WindowsPipes.php
+++ b/Pipes/WindowsPipes.php
@@ -87,12 +87,12 @@ public function __construct(
         parent::__construct($input);
     }
 
-    public function __sleep(): array
+    public function __serialize(): array
     {
         throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
     }
 
-    public function __wakeup(): void
+    public function __unserialize(array $data): void
     {
         throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
     }
diff --git a/Process.php b/Process.php
index a8beb93d..a683d835 100644
--- a/Process.php
+++ b/Process.php
@@ -197,12 +197,12 @@ public static function fromShellCommandline(string $command, ?string $cwd = null
         return $process;
     }
 
-    public function __sleep(): array
+    public function __serialize(): array
     {
         throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
     }
 
-    public function __wakeup(): void
+    public function __unserialize(array $data): void
     {
         throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
     }