diff --git a/src/Helper.php b/src/Helper.php
index 1e41669..2aa9efe 100644
--- a/src/Helper.php
+++ b/src/Helper.php
@@ -93,7 +93,7 @@ public static function modifyConfig(array &$config, string $appType): void
             $mutex = Module::getInstance()->getConfig()->useMutex
                 ? Craft::createObject([
                     'class' => Mutex::class,
-                    'namePrefix' => Module::getInstance()->getConfig()->environmentId,
+                    'namePrefix' => Module::getInstance()->getConfig()->environmentId . ':',
                 ])
                 : $config['components']['mutex'];