diff --git a/composer.json b/composer.json
index a2dc2a7f..ec2afdb1 100755
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
         "amphp/amp": "^2",
         "amphp/byte-stream": "^1.5",
         "amphp/parser": "^1",
-        "amphp/process": "^1",
+        "amphp/process": "dev-master as 1.0.2",
         "amphp/sync": "^1.0.1"
     },
     "require-dev": {
@@ -54,6 +54,12 @@
             "php": "7.0.0"
         }
     },
+    "repositories": [
+        {
+            "type": "vcs",
+            "url": "https://github.com/Ekstazi/process"
+        }
+    ],
     "scripts": {
         "check": [
             "@cs",
diff --git a/lib/Context/Context.php b/lib/Context/Context.php
index c3d4a26f..2e4f9a36 100644
--- a/lib/Context/Context.php
+++ b/lib/Context/Context.php
@@ -31,4 +31,11 @@ public function kill();
      * @throws \Amp\Parallel\Sync\PanicError If the context throws an uncaught exception.
      */
     public function join(): Promise;
+
+    /**
+     * Restarts the execution context.
+     * @param $force bool Whether to force restart or wait until finish first
+     * @return Promise
+     */
+    public function restart($force = false): Promise;
 }
diff --git a/lib/Context/Process.php b/lib/Context/Process.php
index 10d43475..def1b6aa 100644
--- a/lib/Context/Process.php
+++ b/lib/Context/Process.php
@@ -358,4 +358,19 @@ public function kill()
     {
         $this->process->kill();
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function restart($force = false): Promise
+    {
+        return call(function () use ($force) {
+            if ($force) {
+                $this->kill();
+            } else {
+                yield $this->join();
+            }
+            yield $this->start();
+        });
+    }
 }
diff --git a/lib/Context/Thread.php b/lib/Context/Thread.php
index 6f644b48..9077b5d1 100644
--- a/lib/Context/Thread.php
+++ b/lib/Context/Thread.php
@@ -193,6 +193,7 @@ public function kill()
             } finally {
                 $this->close();
             }
+            $this->oid = 0;
         }
     }
 
@@ -248,7 +249,7 @@ public function join(): Promise
                 Loop::disable($this->watcher);
                 $this->close();
             }
-
+            $this->oid = 0;
             return $response->getResult();
         });
     }
@@ -308,4 +309,19 @@ public function send($data): Promise
             return $result;
         });
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function restart($force = false): Promise
+    {
+        return call(function () use ($force) {
+            if ($force) {
+                $this->kill();
+            } else {
+                yield $this->join();
+            }
+            yield $this->start();
+        });
+    }
 }
diff --git a/lib/Worker/Internal/WorkerProcess.php b/lib/Worker/Internal/WorkerProcess.php
index 39184e45..3416605e 100644
--- a/lib/Worker/Internal/WorkerProcess.php
+++ b/lib/Worker/Internal/WorkerProcess.php
@@ -60,4 +60,16 @@ public function join(): Promise
     {
         return $this->process->join();
     }
+
+    public function restart($force = false): Promise
+    {
+        return call(function () use ($force) {
+            if ($force) {
+                $this->kill();
+            } else {
+                yield $this->join();
+            }
+            return $this->start();
+        });
+    }
 }
diff --git a/test/Context/AbstractContextTest.php b/test/Context/AbstractContextTest.php
index a406f8f8..a1917668 100644
--- a/test/Context/AbstractContextTest.php
+++ b/test/Context/AbstractContextTest.php
@@ -66,26 +66,6 @@ public function testStartWhileRunningThrowsError()
         });
     }
 
-    /**
-     * @expectedException \Amp\Parallel\Context\StatusError
-     */
-    public function testStartMultipleTimesThrowsError()
-    {
-        $this->assertRunTimeGreaterThan(function () {
-            Loop::run(function () {
-                $context = $this->createContext(function () {
-                    \sleep(1);
-                });
-
-                yield $context->start();
-                yield $context->join();
-
-                yield $context->start();
-                yield $context->join();
-            });
-        }, 2000);
-    }
-
     /**
      * @expectedException \Amp\Parallel\Sync\PanicError
      */
@@ -308,4 +288,84 @@ public function testExitingContextOnSend()
             yield $context->send(\str_pad("", 1024 * 1024, "-"));
         });
     }
+
+    public function testStartAfterJoin()
+    {
+        $this->assertRunTimeGreaterThan(function () {
+            Loop::run(function () {
+                $context = $this->createContext(function () {
+                    \usleep(100000);
+                });
+                for ($i=0; $i<=1;$i++) {
+                    $this->assertFalse($context->isRunning());
+
+                    yield $context->start();
+
+                    $this->assertTrue($context->isRunning());
+
+                    yield $context->join();
+                    $this->assertFalse($context->isRunning());
+                }
+            });
+        }, 200);
+    }
+
+    public function testStartAfterKill()
+    {
+        $this->assertRunTimeLessThan(function () {
+            Loop::run(function () {
+                $context = $this->createContext(function () {
+                    \usleep(100000);
+                });
+                for ($i=0; $i<=1;$i++) {
+                    $this->assertFalse($context->isRunning());
+
+                    yield $context->start();
+
+                    $this->assertTrue($context->isRunning());
+
+                    $this->assertRunTimeLessThan([$context, 'kill'], 1000);
+                    $this->assertFalse($context->isRunning());
+                }
+            });
+        }, 200);
+    }
+
+    public function testRestart()
+    {
+        $this->assertRunTimeGreaterThan(function () {
+            Loop::run(function () {
+                $context = $this->createContext(function () {
+                    \usleep(100000);
+                });
+                $this->assertFalse($context->isRunning());
+                yield $context->start();
+
+                for ($i = 0; $i <= 1; $i++) {
+                    $this->assertTrue($context->isRunning());
+
+                    yield $context->restart();
+                }
+            });
+        }, 200);
+    }
+
+    public function testForceRestart()
+    {
+        $this->assertRunTimeLessThan(function () {
+            Loop::run(function () {
+                $context = $this->createContext(function () {
+                    \usleep(100000);
+                });
+                $this->assertFalse($context->isRunning());
+                yield $context->start();
+
+                for ($i = 0; $i <= 1; $i++) {
+                    $this->assertTrue($context->isRunning());
+
+                    yield $context->restart(true);
+                }
+            });
+        }, 200);
+    }
 }
diff --git a/test/Context/ProcessTest.php b/test/Context/ProcessTest.php
index 17e3beef..7baffd79 100644
--- a/test/Context/ProcessTest.php
+++ b/test/Context/ProcessTest.php
@@ -84,4 +84,76 @@ public function testParseError()
             \var_dump(yield $process->join());
         });
     }
+
+    public function testStartAfterJoin()
+    {
+        $this->assertRunTimeGreaterThan(function () {
+            Loop::run(function () {
+                $context = new Process(__DIR__ . "/wait-process.php");
+                for ($i=0; $i<=1; $i++) {
+                    $this->assertFalse($context->isRunning());
+
+                    yield $context->start();
+
+                    $this->assertTrue($context->isRunning());
+
+                    yield $context->join();
+                    $this->assertFalse($context->isRunning());
+                }
+            });
+        }, 2000);
+    }
+
+    public function testStartAfterKill()
+    {
+        $this->assertRunTimeLessThan(function () {
+            Loop::run(function () {
+                $context = new Process(__DIR__ . "/wait-process.php");
+                for ($i=0; $i<=1;$i++) {
+                    $this->assertFalse($context->isRunning());
+
+                    yield $context->start();
+
+                    $this->assertTrue($context->isRunning());
+
+                    $this->assertRunTimeLessThan([$context, 'kill'], 1000);
+                    $this->assertFalse($context->isRunning());
+                }
+            });
+        }, 2000);
+    }
+
+    public function testRestart()
+    {
+        $this->assertRunTimeGreaterThan(function () {
+            Loop::run(function () {
+                $context = new Process(__DIR__ . "/wait-process.php");
+                $this->assertFalse($context->isRunning());
+                yield $context->start();
+
+                for ($i = 0; $i <= 1; $i++) {
+                    $this->assertTrue($context->isRunning());
+
+                    yield $context->restart();
+                }
+            });
+        }, 2000);
+    }
+
+    public function testForceRestart()
+    {
+        $this->assertRunTimeLessThan(function () {
+            Loop::run(function () {
+                $context = new Process(__DIR__ . "/wait-process.php");
+                $this->assertFalse($context->isRunning());
+                yield $context->start();
+
+                for ($i = 0; $i <= 1; $i++) {
+                    $this->assertTrue($context->isRunning());
+
+                    yield $context->restart(true);
+                }
+            });
+        }, 2000);
+    }
 }
diff --git a/test/Context/wait-process.php b/test/Context/wait-process.php
new file mode 100644
index 00000000..340ef3cb
--- /dev/null
+++ b/test/Context/wait-process.php
@@ -0,0 +1,8 @@
+<?php
+
+use Amp\Parallel\Sync\Channel;
+
+return function (Channel $channel) use ($argv): string {
+    \usleep(1000000);
+    return 'test';
+};