diff --git a/.env.example b/.env.example
index ce6bdf6..5c4e5f9 100644
--- a/.env.example
+++ b/.env.example
@@ -16,3 +16,5 @@ BASE_UPLOAD_URL=
 BASE_CONTENT_ENTRY_PATH=
 # Command to build your static site, e.g. "sh /path/to/build.sh"
 SITE_BUILD_COMMAND=
+# URL to notify about a new post.
+POST_CREATED_PING_URL=
diff --git a/app/Events/PostContentEvent.php b/app/Events/PostContentEvent.php
new file mode 100644
index 0000000..d135111
--- /dev/null
+++ b/app/Events/PostContentEvent.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Events;
+
+/**
+ * Class PostContentEvent
+ */
+class PostContentEvent extends Event
+{
+    /**
+     * @var string|null
+     */
+    private $url;
+
+    /**
+     * PostContentEvent constructor.
+     *
+     * @param string|null $url
+     */
+    public function __construct(?string $url = null)
+    {
+        $this->url = $url;
+    }
+
+    public function getUrl(): ?string
+    {
+        return $this->url;
+    }
+}
diff --git a/app/Events/RebuildSiteEvent.php b/app/Events/RebuildSiteEvent.php
deleted file mode 100644
index a7700be..0000000
--- a/app/Events/RebuildSiteEvent.php
+++ /dev/null
@@ -1,19 +0,0 @@
-<?php
-
-namespace App\Events;
-
-/**
- * Class RebuildSiteEvent
- */
-class RebuildSiteEvent extends Event
-{
-    /**
-     * Create a new event instance.
-     *
-     * @return void
-     */
-    public function __construct()
-    {
-        //
-    }
-}
diff --git a/app/Http/Controllers/MediaController.php b/app/Http/Controllers/MediaController.php
index 0f698c3..8054a3c 100644
--- a/app/Http/Controllers/MediaController.php
+++ b/app/Http/Controllers/MediaController.php
@@ -2,7 +2,7 @@
 
 namespace App\Http\Controllers;
 
-use App\Events\RebuildSiteEvent;
+use App\Events\PostContentEvent;
 use App\Service\MediaService;
 use Illuminate\Contracts\Events\Dispatcher as DispatcherContract;
 use Illuminate\Http\JsonResponse;
@@ -85,7 +85,7 @@ public function upload(Request $request): JsonResponse
 
         // Even though we're only uploading a file we need to rebuild the site because it copies the actual file across.
         $this->eventDispatcher->dispatch(
-            new RebuildSiteEvent()
+            new PostContentEvent()
         );
 
         return new JsonResponse(
diff --git a/app/Http/Controllers/PostMethodController.php b/app/Http/Controllers/PostMethodController.php
index ba8b866..9bdd78f 100644
--- a/app/Http/Controllers/PostMethodController.php
+++ b/app/Http/Controllers/PostMethodController.php
@@ -2,13 +2,14 @@
 
 namespace App\Http\Controllers;
 
-use App\Events\RebuildSiteEvent;
+use App\Events\PostContentEvent;
 use App\Providers\AbstractProvider;
 use App\Service\ItemWriterService;
 use App\ValueObjects\ItemRequestValueObjectInterface;
 use Illuminate\Contracts\Events\Dispatcher as DispatcherContract;
 use Illuminate\Http\Request;
 use Illuminate\Http\Response;
+use Illuminate\Support\Str;
 
 /**
  * Class PostMethodController
@@ -111,7 +112,7 @@ private function handleCreateItem(ItemRequestValueObjectInterface $newItem): str
 
             $firstThreeWords = implode(' ', $firstThreeWordsArray);
 
-            $slug = str_slug($firstThreeWords, '-');
+            $slug = Str::slug($firstThreeWords, '-');
         }
 
         if (!array_key_exists('mp-slug', $commands) && '' !== $frontMatterProperties->get('name', '')) {
@@ -122,7 +123,7 @@ private function handleCreateItem(ItemRequestValueObjectInterface $newItem): str
             $slug = $commands['mp-slug'];
         }
 
-        $frontMatter['slug'] = str_slug($slug, '-');
+        $frontMatter['slug'] = Str::slug($slug, '-');
 
         $frontMatter['date'] = $now->format(\DateTime::W3C);
 
@@ -145,16 +146,18 @@ private function handleCreateItem(ItemRequestValueObjectInterface $newItem): str
             $pathToWriteTo.'/'.$filename
         );
 
-        $this->eventDispatcher->dispatch(
-            new RebuildSiteEvent()
-        );
-
-        return sprintf(
+        $url = sprintf(
             '%s%d/%02d/%s/',
             env('ME_URL'),
             $now->format('Y'),
             $now->format('m'),
             $frontMatter['slug']
         );
+
+        $this->eventDispatcher->dispatch(
+            new PostContentEvent($url)
+        );
+
+        return $url;
     }
 }
diff --git a/app/Listeners/PostCreatedPingListener.php b/app/Listeners/PostCreatedPingListener.php
new file mode 100644
index 0000000..1ccb193
--- /dev/null
+++ b/app/Listeners/PostCreatedPingListener.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace App\Listeners;
+
+use App\Events\PostContentEvent;
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\RequestException;
+use Illuminate\Log\Logger;
+
+/**
+ * Class PostCreatedPingListener
+ */
+class PostCreatedPingListener
+{
+    /**
+     * @var Client
+     */
+    private $client;
+
+    /**
+     * @var Logger
+     */
+    private $logger;
+
+    /**
+     * PostCreatedPingListener constructor.
+     */
+    public function __construct()
+    {
+        $this->client = new Client();
+        $this->logger = app('logger');
+    }
+
+    /**
+     * @param PostContentEvent $event
+     *
+     * @return void
+     */
+    public function handle(PostContentEvent $event): void
+    {
+        $newPostUrl = $event->getUrl();
+
+        $notifyUrl = env('POST_CREATED_PING_URL', null);
+
+        // If no notification URL has been set then obviously we can't notify anyone.
+        if (null === $newPostUrl || null === $notifyUrl) {
+            return;
+        }
+
+        try {
+            $this->client->post(
+                $notifyUrl,
+                [
+                    'url' => $newPostUrl,
+                ]
+            );
+
+            $this->logger->info(
+                "Notified URL '{notifyUrl}' about new post",
+                [
+                    'notifyUrl' => $notifyUrl,
+                    'newPostUrl' => $newPostUrl,
+                ]
+            );
+        } catch (RequestException $e) {
+            $this->logger->error(
+                "Unable to notify URL '{notifyUrl}' due to a request exception",
+                [
+                    'notifyUrl' => $notifyUrl,
+                    'newPostUrl' => $newPostUrl,
+                    'e' => $e,
+                ]
+            );
+        }
+    }
+}
diff --git a/app/Listeners/RebuildSiteListener.php b/app/Listeners/RebuildSiteListener.php
index d37ec01..3457f89 100644
--- a/app/Listeners/RebuildSiteListener.php
+++ b/app/Listeners/RebuildSiteListener.php
@@ -2,7 +2,7 @@
 
 namespace App\Listeners;
 
-use App\Events\RebuildSiteEvent;
+use App\Events\PostContentEvent;
 use Illuminate\Contracts\Console\Kernel;
 
 /**
@@ -28,11 +28,11 @@ public function __construct(Kernel $console)
     /**
      * Handle the event.
      *
-     * @param RebuildSiteEvent $event
+     * @param PostContentEvent $event
      *
      * @return void
      */
-    public function handle(RebuildSiteEvent $event): void
+    public function handle(PostContentEvent $event): void
     {
         $this->console->call('site:build');
 
diff --git a/app/Service/MediaService.php b/app/Service/MediaService.php
index 873e454..e727655 100644
--- a/app/Service/MediaService.php
+++ b/app/Service/MediaService.php
@@ -173,7 +173,7 @@ public function uploadPhotos(array $photos): array
      */
     public function uploadPhoto(UploadedFile $file): string
     {
-        $filenameAndExtension = str_random(40).'.'.$file->guessExtension();
+        $filenameAndExtension = $file->hashName();
 
         $this
             ->imageManager
diff --git a/app/ServiceProviders/EventServiceProvider.php b/app/ServiceProviders/EventServiceProvider.php
index 76d427a..db66a76 100644
--- a/app/ServiceProviders/EventServiceProvider.php
+++ b/app/ServiceProviders/EventServiceProvider.php
@@ -2,7 +2,8 @@
 
 namespace App\ServiceProviders;
 
-use App\Events\RebuildSiteEvent;
+use App\Events\PostContentEvent;
+use App\Listeners\PostCreatedPingListener;
 use App\Listeners\RebuildSiteListener;
 use Laravel\Lumen\Providers\EventServiceProvider as ServiceProvider;
 
@@ -17,7 +18,8 @@ class EventServiceProvider extends ServiceProvider
      * @var array
      */
     protected $listen = [
-        RebuildSiteEvent::class => [
+        PostContentEvent::class => [
+            PostCreatedPingListener::class,
             RebuildSiteListener::class,
         ],
     ];
diff --git a/bootstrap/app.php b/bootstrap/app.php
index 23bd29a..0c14e77 100644
--- a/bootstrap/app.php
+++ b/bootstrap/app.php
@@ -111,7 +111,7 @@ function($app) {
         ],
     ],
     'image' => [
-        'driver' => 'Imagick',
+        'driver' => env('IMAGE_LIBRARY', 'gd'),
     ]
 ]);
 
diff --git a/phpunit.xml b/phpunit.xml
index 2103da6..2b92ad6 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -27,5 +27,6 @@
         <env name="BASE_CONTENT_ENTRY_PATH" value="tests/blog/"/>
         <env name="BASE_UPLOAD_PATH" value="tests/blog/images/" />
         <env name="ME_URL" value="http://micropub.test"/>
+        <env name="POST_CREATED_PING_URL" value=""/>
     </php>
 </phpunit>
diff --git a/tests/PostMediaTest.php b/tests/PostMediaTest.php
index dea59ce..78bdc96 100644
--- a/tests/PostMediaTest.php
+++ b/tests/PostMediaTest.php
@@ -1,9 +1,11 @@
 <?php
 
-use App\Events\RebuildSiteEvent;
+use App\Events\PostContentEvent;
 use App\Providers\AbstractProvider;
 use Illuminate\Http\UploadedFile;
 use Illuminate\Support\Facades\Event;
+use Illuminate\Support\Facades\Storage;
+use Symfony\Component\HttpFoundation\Response;
 
 class PostMediaTest extends TestCase
 {
@@ -35,10 +37,10 @@ public function testNewPostUsingFormInput()
 
         $now = new \DateTime();
 
-        Event::assertDispatched(RebuildSiteEvent::class);
+        Event::assertDispatched(PostContentEvent::class);
 
         $this->assertFileExists($this->generateFilename('entry', $now, $slug));
-        $this->assertResponseStatus(201);
+        $this->assertResponseStatus(Response::HTTP_CREATED);
         $this->seeHeader('Location', $this->generateUrl($now, $slug));
     }
 
@@ -58,10 +60,10 @@ public function testNewPostIgnoresUrlsInPostBodyForSlug()
 
         $now = new \DateTime();
 
-        Event::assertDispatched(RebuildSiteEvent::class);
+        Event::assertDispatched(PostContentEvent::class);
 
         $this->assertFileExists($this->generateFilename('entry', $now, $expectedSlug));
-        $this->assertResponseStatus(201);
+        $this->assertResponseStatus(Response::HTTP_CREATED);
         $this->seeHeader('Location', $this->generateUrl($now, $expectedSlug));
     }
 
@@ -82,10 +84,10 @@ public function testNewPostWithCustomSlugUsingFormInput()
 
         $now = new \DateTime();
 
-        Event::assertDispatched(RebuildSiteEvent::class);
+        Event::assertDispatched(PostContentEvent::class);
 
         $this->assertFileExists($this->generateFilename('entry', $now, $slug));
-        $this->assertResponseStatus(201);
+        $this->assertResponseStatus(Response::HTTP_CREATED);
         $this->seeHeader('Location', $this->generateUrl($now, $slug));
     }
 
@@ -107,10 +109,10 @@ public function testNewPostWithCustomTitleUsingFormInput()
 
         $now = new \DateTime();
 
-        Event::assertDispatched(RebuildSiteEvent::class);
+        Event::assertDispatched(PostContentEvent::class);
 
         $this->assertFileExists($this->generateFilename('entry', $now, $slug));
-        $this->assertResponseStatus(201);
+        $this->assertResponseStatus(Response::HTTP_CREATED);
         $this->seeHeader('Location', $this->generateUrl($now, $slug));
         $this->assertContains(
             "title: '${title}'",
@@ -134,7 +136,7 @@ public function testNewPostWithImageAndNoText()
 
         $now = new \DateTime();
 
-        Event::assertDispatched(RebuildSiteEvent::class);
+        Event::assertDispatched(PostContentEvent::class);
 
         $this->assertFileExists($this->generateFilename('entry', $now, strtolower($now->format('l-jS'))));
     }
@@ -145,12 +147,11 @@ public function testCanUploadImage()
 
         $file = UploadedFile::fake()->image('test.jpg');
 
-        $this->post(
-            '/media',
-            [
-                'file' => $file,
-            ]
-        );
+        $this->call('POST', '/media', [], [], ['file' => $file], []);
+
+        $this->assertResponseStatus(Response::HTTP_CREATED);
+        Storage::disk('local')->assertExists('2019/'.$file->hashName().'.original');
+        Storage::disk('local')->assertExists('2019/'.$file->hashName());
     }
 
     private function generateUrl(