diff --git a/php/src/Docker/DockerActionManager.php b/php/src/Docker/DockerActionManager.php
index 8ccbe1ec..d9f3d539 100644
--- a/php/src/Docker/DockerActionManager.php
+++ b/php/src/Docker/DockerActionManager.php
@@ -736,7 +736,7 @@ readonly class DockerActionManager {
             $output = json_decode($this->guzzleClient->get($url)->getBody()->getContents(), true);
             $containerChecksum = $output['Image'];
             $tagArray = explode(':', $output['Config']['Image']);
-            if (isset($tagArray[1])) {
+            if (count($tagArray) ===  2) {
                 $tag = $tagArray[1];
             } else {
                 error_log("No tag was found when getting the current channel. You probably did not follow the documentation correctly. Changing the channel to the default 'latest'.");