diff --git a/composer.json b/composer.json
index 509605b1ca..bb675c651e 100644
--- a/composer.json
+++ b/composer.json
@@ -24,6 +24,7 @@
 		"ext-libxml": "*",
 		"ext-mbstring": "*",
 		"ext-openssl": "*",
+		"ext-posix": "*",
 		"ext-simplexml": "*",
 		"ext-xml": "*",
 		"asika/simple-console": "^1.0",
@@ -34,6 +35,7 @@
 		"friendica/json-ld": "^1.0",
 		"geekwright/po": "^2.0",
 		"guzzlehttp/guzzle": "^6.5",
+		"kornrunner/blurhash": "^1.2",
 		"league/html-to-markdown": "^4.8",
 		"level-2/dice": "^4",
 		"lightopenid/lightopenid": "dev-master",
@@ -49,6 +51,7 @@
 		"phpseclib/phpseclib": "^3.0",
 		"pragmarx/google2fa": "^5.0",
 		"pragmarx/recovery": "^0.2",
+		"psr/clock": "^1.0",
 		"psr/container": "^1.0",
 		"psr/log": "^1.1",
 		"seld/cli-prompt": "^1.0",
@@ -71,9 +74,7 @@
 		"npm-asset/moment": "^2.24",
 		"npm-asset/perfect-scrollbar": "0.6.16",
 		"npm-asset/textcomplete": "^0.18.2",
-		"npm-asset/typeahead.js": "^0.11.1",
-		"kornrunner/blurhash": "^1.2",
-		"psr/clock": "^1.0"
+		"npm-asset/typeahead.js": "^0.11.1"
 	},
 	"repositories": [
 		{
diff --git a/src/Core/Worker/Repository/Process.php b/src/Core/Worker/Repository/Process.php
index eb8fb07e32..b18a5b443d 100644
--- a/src/Core/Worker/Repository/Process.php
+++ b/src/Core/Worker/Repository/Process.php
@@ -112,7 +112,7 @@ class Process extends BaseRepository
 		try {
 			$processes = $this->db->select(static::$table_name, ['pid'], ['hostname' => $this->currentHost]);
 			while ($process = $this->db->fetch($processes)) {
-				if (!posix_kill($process['pid'], 0)) {
+				if (!\posix_kill($process['pid'], 0)) {
 					$this->db->delete(static::$table_name, ['pid' => $process['pid']]);
 				}
 			}