diff --git a/.gitignore b/.gitignore
index 3001e63..c788e08 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,8 @@
+composer.lock
+
+custom.type.properties
+custom.task.properties
+
 .buildpath
 .DS_Store
 .idea
@@ -6,7 +11,6 @@
 .*.sw*
 .*.un~
 build/
-composer.lock
 nbproject
 tmp/
-/vendor
\ No newline at end of file
+/vendor
diff --git a/composer.json b/composer.json
index 71a9251..990dd30 100644
--- a/composer.json
+++ b/composer.json
@@ -10,13 +10,23 @@
             "email": "matthias@krauser.eu"
         }
     ],
+    "prefer-stable": true,
+    "minimum-stability": "dev",
     "require": {
-        "php": ">=5.3",
-        "phing/phing": ">=2.7.0"
+        "php": "^7.3 || ^7.4 || ^8.0 || ^8.1 || ^8.2 || ^8.3",
+        "ext-json": "*",
+        "mehr-als-nix/parallel": "^1.0",
+        "phing/phing": "*"
     },
     "autoload": {
         "psr-4": {
             "MaK\\Phing\\Task\\": "src/"
         }
+    },
+    "config": {
+        "sort-packages": true,
+        "allow-plugins": {
+            "phing/phing-composer-configurator": true
+        }
     }
-}
\ No newline at end of file
+}
diff --git a/src/ForeachParallelTask.php b/src/ForeachParallelTask.php
index 2145ada..cc2e40a 100644
--- a/src/ForeachParallelTask.php
+++ b/src/ForeachParallelTask.php
@@ -20,16 +20,18 @@
 
 namespace MaK\Phing\Task;
 
-use \BuildException;
-use \FileList;
-use \FileSet;
-use \Mapper;
-use \PhingFile;
-use \Project;
-use \Task;
-
-use \DocBlox_Parallel_Manager,
-    \DocBlox_Parallel_Worker;
+use MehrAlsNix\Parallel\Manager;
+use MehrAlsNix\Parallel\Worker;
+use Phing\Exception\BuildException;
+use Phing\Io\File;
+use Phing\Io\FileSystem;
+use Phing\Project;
+use Phing\Task;
+use Phing\Task\System\PhingTask;
+use Phing\Task\System\PropertyTask;
+use Phing\Type\FileList;
+use Phing\Type\FileSet;
+use Phing\Type\Mapper;
 
 /**
  * <foreach_parallel> task
@@ -63,6 +65,12 @@
  */
 class ForeachParallelTask extends Task
 {
+    /**
+     * The called Phing task.
+     *
+     * @var PhingTask
+     */
+    private $callee;
 
     /** Delimter-separated list of values to process. */
     private $list;
@@ -107,7 +115,7 @@ class ForeachParallelTask extends Task
      * Total number of directories processed
      * @var integer
      */
-    private $total_dirs  = 0;
+    private $total_dirs = 0;
 
     private function getCallee()
     {
@@ -116,6 +124,7 @@ private function getCallee()
         $callee->setTaskName($this->getTaskName());
         $callee->setLocation($this->getLocation());
         $callee->init();
+        $this->callee = $callee;
 
         return $callee;
     }
@@ -136,17 +145,14 @@ public function main()
             throw new BuildException("You must supply a target to perform");
         }
 
-        @include_once 'phing/contrib/DocBlox/Parallel/Manager.php';
-        @include_once 'phing/contrib/DocBlox/Parallel/Worker.php';
-        @include_once 'phing/contrib/DocBlox/Parallel/WorkerPipe.php';
-        if (!class_exists('DocBlox_Parallel_Worker')) {
+        if (!class_exists(Worker::class)) {
             throw new BuildException(
-                'ForeachParallelTask depends on DocBlox being installed and on include_path.',
+                'ForeachParallelTask depends on phpDocumentor/Parallel being installed and on include_path.',
                 $this->getLocation()
             );
         }
 
-        $parallelManager = new DocBlox_Parallel_Manager();
+        $parallelManager = new Manager();
         $parallelManager->setProcessLimit($this->threadCount);
 
         $mapper = null;
@@ -170,7 +176,8 @@ public function main()
                     }
                     $value = array_shift($value);
                 }
-                $this->log("Setting param '$this->param' to value '$value'" . ($premapped ? " (mapped from '$premapped')" : ''), Project::MSG_VERBOSE);
+                $this->log("Setting param '$this->param' to value '$value'" . ($premapped ? " (mapped from '$premapped')" : ''),
+                    Project::MSG_VERBOSE);
                 $callee = $this->getCallee();
                 $callee->setTarget($this->calleeTarget);
                 $callee->setInheritAll(true);
@@ -180,7 +187,7 @@ public function main()
                 $prop->setOverride(true);
                 $prop->setName($this->param);
                 $prop->setValue($value);
-                $worker = new DocBlox_Parallel_Worker(
+                $worker = new Worker(
                     array($callee, 'main'),
                     array($callee)
                 );
@@ -198,9 +205,9 @@ public function main()
 
         // filesets
         foreach ($this->filesets as $fs) {
-            $ds       = $fs->getDirectoryScanner($this->project);
+            $ds = $fs->getDirectoryScanner($this->project);
             $srcFiles = $ds->getIncludedFiles();
-            $srcDirs  = $ds->getIncludedDirectories();
+            $srcDirs = $ds->getIncludedDirectories();
 
             $this->process($parallelManager, $this->getCallee(), $fs->getDir($this->project), $srcFiles, $srcDirs);
         }
@@ -208,21 +215,23 @@ public function main()
         $parallelManager->execute();
 
         if ($this->list === null) {
-            $this->log("Processed {$this->total_dirs} directories and {$this->total_files} files", Project::MSG_VERBOSE);
+            $this->log("Processed {$this->total_dirs} directories and {$this->total_files} files",
+                Project::MSG_VERBOSE);
         } else {
-            $this->log("Processed $total_entries entr" . ($total_entries > 1 ? 'ies' : 'y') . " in list", Project::MSG_VERBOSE);
+            $this->log("Processed $total_entries entr" . ($total_entries > 1 ? 'ies' : 'y') . " in list",
+                Project::MSG_VERBOSE);
         }
     }
 
     /**
      * Processes a list of files & directories
      *
-     * @param Task      $callee
-     * @param PhingFile $fromDir
-     * @param array     $srcFiles
-     * @param array     $srcDirs
+     * @param Task $callee
+     * @param File $fromDir
+     * @param array $srcFiles
+     * @param array $srcDirs
      */
-    protected function process(DocBlox_Parallel_Manager $parallelManager, Task $callee, PhingFile $fromDir, $srcFiles, $srcDirs)
+    protected function process(Manager $parallelManager, Task $callee, File $fromDir, $srcFiles, $srcDirs)
     {
         $mapper = null;
 
@@ -254,14 +263,15 @@ protected function process(DocBlox_Parallel_Manager $parallelManager, Task $call
             }
 
             if ($this->param) {
-                $this->log("Setting param '$this->param' to value '$value'" . ($premapped ? " (mapped from '$premapped')" : ''), Project::MSG_VERBOSE);
+                $this->log("Setting param '$this->param' to value '$value'" . ($premapped ? " (mapped from '$premapped')" : ''),
+                    Project::MSG_VERBOSE);
                 $prop = $callee->createProperty();
                 $prop->setOverride(true);
                 $prop->setName($this->param);
                 $prop->setValue($value);
             }
 
-            $worker = new DocBlox_Parallel_Worker(
+            $worker = new Worker(
                 array($callee, 'main'),
                 array($callee)
             );
@@ -272,7 +282,7 @@ protected function process(DocBlox_Parallel_Manager $parallelManager, Task $call
         $dircount = count($srcDirs);
         $this->total_dirs += $dircount;
 
-        for ($j = 0; $j <  $dircount; $j++) {
+        for ($j = 0; $j < $dircount; $j++) {
             $value = $srcDirs[$j];
             $premapped = "";
 
@@ -293,14 +303,15 @@ protected function process(DocBlox_Parallel_Manager $parallelManager, Task $call
             }
 
             if ($this->param) {
-                $this->log("Setting param '$this->param' to value '$value'" . ($premapped ? " (mapped from '$premapped')" : ''), Project::MSG_VERBOSE);
+                $this->log("Setting param '$this->param' to value '$value'" . ($premapped ? " (mapped from '$premapped')" : ''),
+                    Project::MSG_VERBOSE);
                 $prop = $callee->createProperty();
                 $prop->setOverride(true);
                 $prop->setName($this->param);
                 $prop->setValue($value);
             }
 
-            $worker = new DocBlox_Parallel_Worker(
+            $worker = new Worker(
                 array($callee, 'main'),
                 array($callee)
             );
@@ -311,27 +322,27 @@ protected function process(DocBlox_Parallel_Manager $parallelManager, Task $call
 
     public function setList($list)
     {
-        $this->list = (string) $list;
+        $this->list = (string)$list;
     }
 
     public function setTarget($target)
     {
-        $this->calleeTarget = (string) $target;
+        $this->calleeTarget = (string)$target;
     }
 
     public function setParam($param)
     {
-        $this->param = (string) $param;
+        $this->param = (string)$param;
     }
 
     public function setAbsparam($absparam)
     {
-        $this->absparam = (string) $absparam;
+        $this->absparam = (string)$absparam;
     }
 
     public function setDelimiter($delimiter)
     {
-        $this->delimiter = (string) $delimiter;
+        $this->delimiter = (string)$delimiter;
     }
 
     /**
@@ -363,7 +374,7 @@ public function addFileSet(FileSet $fs)
     public function createMapper()
     {
         if ($this->mapperElement !== null) {
-            throw new BuildException("Cannot define more than one mapper", $this->location);
+            throw new BuildException("Cannot define more than one mapper", $this->getLocation());
         }
         $this->mapperElement = new Mapper($this->project);
 
@@ -371,7 +382,7 @@ public function createMapper()
     }
 
     /**
-     * @return Property
+     * @return PropertyTask
      */
     public function createProperty()
     {
@@ -386,6 +397,6 @@ public function createFileList()
     {
         $num = array_push($this->filelists, new FileList());
 
-        return $this->filelists[$num-1];
+        return $this->filelists[$num - 1];
     }
 }