diff --git a/composer.lock b/composer.lock
index 45963ded209..26b90860271 100644
--- a/composer.lock
+++ b/composer.lock
@@ -13,17 +13,17 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/ChristophWurst/nextcloud_composer.git",
-                "reference": "56056903c03bf8c29b2a2822153951c8f783a85a"
+                "reference": "8bd067e9ce95dcf1ee6beaa3b27a0f13a14ae901"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/ChristophWurst/nextcloud_composer/zipball/56056903c03bf8c29b2a2822153951c8f783a85a",
-                "reference": "56056903c03bf8c29b2a2822153951c8f783a85a",
+                "url": "https://api.github.com/repos/ChristophWurst/nextcloud_composer/zipball/8bd067e9ce95dcf1ee6beaa3b27a0f13a14ae901",
+                "reference": "8bd067e9ce95dcf1ee6beaa3b27a0f13a14ae901",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.4 || ~8.0 || ~8.1",
-                "psr/container": "^1.0",
+                "psr/container": "^1.1.1",
                 "psr/event-dispatcher": "^1.0",
                 "psr/log": "^1.1"
             },
@@ -31,7 +31,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "24.0.0-dev"
+                    "dev-master": "25.0.0-dev"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -49,7 +49,7 @@
                 "issues": "https://github.com/ChristophWurst/nextcloud_composer/issues",
                 "source": "https://github.com/ChristophWurst/nextcloud_composer/tree/master"
             },
-            "time": "2022-03-01T01:41:01+00:00"
+            "time": "2022-07-09T02:03:24+00:00"
         },
         {
             "name": "composer/pcre",
diff --git a/lib/Service/SessionService.php b/lib/Service/SessionService.php
index bfe43726d0e..105da897ace 100644
--- a/lib/Service/SessionService.php
+++ b/lib/Service/SessionService.php
@@ -226,8 +226,13 @@ public function updateSession(int $documentId, int $sessionId, string $sessionTo
 
 	private function getColorForGuestName(string $guestName = null): string {
 		$guestName = $this->userId ?? $guestName;
-		$uniqueGuestId = !empty($guestName) ? $guestName : $this->secureRandom->generate(12);
-		$color = $this->avatarManager->getGuestAvatar($uniqueGuestId)->avatarBackgroundColor($uniqueGuestId);
-		return sprintf("#%02x%02x%02x", $color->r, $color->g, $color->b);
+		$uniqueGuestId = empty($guestName)
+			? $this->secureRandom->generate(12)
+			: $guestName;
+
+		return $this->avatarManager
+			->getGuestAvatar($uniqueGuestId)
+			->avatarBackgroundColor($uniqueGuestId)
+			->name();
 	}
 }