diff --git a/app/Console/Commands/UpdateCommand.php b/app/Console/Commands/UpdateCommand.php
index d39d89e20..84877d0a2 100644
--- a/app/Console/Commands/UpdateCommand.php
+++ b/app/Console/Commands/UpdateCommand.php
@@ -33,6 +33,7 @@ class UpdateCommand extends Command
         '0.1.7',
         '0.1.8',
         '0.1.9',
+        '0.2.1',
     ];
 
     protected $version;
@@ -76,10 +77,15 @@ class UpdateCommand extends Command
             case '0.1.8':
                 $this->info('You are running an older version that doesn\'t require any updates!');
                 break;
+
             case '0.1.9':
                 $this->update019();
                 break;
 
+            case '0.2.1':
+                $this->update021();
+                break;
+
             default:
                 # code...
                 break;
@@ -127,6 +133,34 @@ class UpdateCommand extends Command
         $bar->finish();
     }
 
+    public function update021()
+    {
+        $this->buildVersionFile();
+        $v = $this->getVersionFile();
+        if($v['updated'] == true) {
+            $this->info('Already up to date!');
+            exit;
+        }
+
+        $statusCount = Status::count();
+        $this->info('Running updates ...');
+        $bar = $this->output->createProgressBar($statusCount);
+        Status::has('media')->chunk(200, function($statuses) use ($bar) {
+
+            foreach($statuses as $status) {
+                if($status->firstMedia()) {
+                    $media = $status->firstMedia();
+                    if(in_array($media->mime, ['image/jpeg', 'image/png'])) {
+                        ImageThumbnail::dispatch($media);
+                    }
+                }
+                $bar->advance();
+            }
+        });
+        $this->updateVersionFile('0.2.1', true);
+        $bar->finish();
+    }
+
     protected function buildVersionFile()
     {
         $path = storage_path('app/version.json');
diff --git a/app/Util/ActivityPub/Helpers.php b/app/Util/ActivityPub/Helpers.php
index 9e79b65dd..e6f52530d 100644
--- a/app/Util/ActivityPub/Helpers.php
+++ b/app/Util/ActivityPub/Helpers.php
@@ -20,7 +20,7 @@ use App\Jobs\AvatarPipeline\CreateAvatar;
 use App\Jobs\RemoteFollowPipeline\RemoteFollowImportRecent;
 use App\Jobs\ImageOptimizePipeline\{ImageOptimize,ImageThumbnail};
 use App\Jobs\StatusPipeline\NewStatusPipeline;
-use HttpSignatures\{GuzzleHttpSignatures, KeyStore, Context, Verifier};
+use App\Util\HttpSignatures\{GuzzleHttpSignatures, KeyStore, Context, Verifier};
 use Symfony\Bridge\PsrHttpMessage\Factory\DiactorosFactory;
 
 class Helpers {
@@ -309,31 +309,27 @@ class Helpers {
     {
         $profile = $senderProfile;
         $keyId = $profile->keyId();
-        $privateKey = openssl_pkey_get_private($profile->private_key);
 
-
-        $date = date('D, d M Y h:i:s').' GMT';
+        $date = new \DateTime('UTC');
+        $date = $date->format('D, d M Y H:i:s \G\M\T');
         $host = parse_url($url, PHP_URL_HOST);
+        $path = parse_url($url, PHP_URL_PATH);
         $headers = [
-        	'(request-target)' => 'post '.parse_url($url, PHP_URL_PATH),
-            'Date'         => $date,
-            'Host'		   => $host,
-            'Content-Type' => 'application/activity+json',
+            'date'         => $date,
+            'host'		   => $host,
+            'content-type' => 'application/activity+json',
         ];
-        if($body) {
-        	$payload = is_string($body) ? $body : json_encode($body);
-        	$digest = base64_encode(hash('sha256', $payload, true));
-        	$headers['Digest'] = 'SHA-256=' . $digest;
-        }
-        $stringToSign = self::_headersToSigningString($headers);
-        $signedHeaders = implode(' ', array_map('strtolower', array_keys($headers)));
-		openssl_sign($stringToSign, $signature, $privateKey, OPENSSL_ALGO_SHA256);
-    	openssl_free_key($privateKey);
-	    $signature = base64_encode($signature);
-    	$signatureHeader = 'keyId="'.$keyId.'",headers="'.$signedHeaders.'",algorithm="rsa-sha256",signature="'.$signature.'"';
-    	unset($headers['(request-target)']);
-    	$headers['Signature'] = $signatureHeader;
-    	Zttp::withHeaders($headers)->post($url, $body);
+
+        $context = new Context([
+            'keys' => [$profile->keyId() => $profile->private_key],
+            'algorithm' => 'rsa-sha256',
+            'headers' => ['(request-target)', 'date', 'host', 'content-type'],
+        ]);
+
+        $handlerStack = GuzzleHttpSignatures::defaultHandlerFromContext($context);
+        $client = new Client(['handler' => $handlerStack]);
+
+        $response = $client->request('POST', $url, ['headers' => $headers, 'json' => $body]);
         return;
     }