diff --git a/plugin.yml b/plugin.yml
index 27cd165..b55696f 100644
--- a/plugin.yml
+++ b/plugin.yml
@@ -1,7 +1,7 @@
 name: OpenFilesLeakDebugger
 main: dktapps\OpenFilesLeakDebugger\Main
 version: 0.1.0
-api: 3.0.0
+api: 4.0.0
 load: STARTUP
 author: dktapps
 description: Debugger for file descriptor leaks
diff --git a/src/dktapps/OpenFilesLeakDebugger/Main.php b/src/dktapps/OpenFilesLeakDebugger/Main.php
index 85c6e83..1855dde 100644
--- a/src/dktapps/OpenFilesLeakDebugger/Main.php
+++ b/src/dktapps/OpenFilesLeakDebugger/Main.php
@@ -2,7 +2,9 @@
 
 namespace dktapps\OpenFilesLeakDebugger;
 
+use pocketmine\errorhandler\ErrorToExceptionHandler;
 use pocketmine\plugin\PluginBase;
+use pocketmine\utils\Process;
 use pocketmine\utils\Utils;
 
 class Main extends PluginBase{
@@ -38,8 +40,9 @@ public function onEnable() : void{
 						$cmd = "lsof -p " . getmypid();
 						break;
 				}
+
 				if($cmd !== null){
-					@Utils::execute($cmd, $stdout, $stderr);
+					@Process::execute($cmd, $stdout, $stderr);
 					$this->getLogger()->emergency("File descriptor leak results:");
 					$this->getLogger()->emergency("stdout:\n$stdout");
 					$this->getLogger()->emergency("stderr:\n$stderr");
@@ -49,7 +52,7 @@ public function onEnable() : void{
 				}
 			}
 
-			return Utils::errorExceptionHandler($severity, $message, $file, $line);
+			return ErrorToExceptionHandler::handle($severity, $message, $file, $line);
 		});
 
 		//For testing the plugin itself only.