diff --git a/src/Bot/init.php b/src/Bot/init.php
index c101238..640cb38 100644
--- a/src/Bot/init.php
+++ b/src/Bot/init.php
@@ -7,5 +7,6 @@ $dotenv->load();
 
 $dotenv->required('BOT_AUTH_TOKEN')->notEmpty();
 $dotenv->required('COMMAND_PREFIX')->notEmpty();
+$dotenv->required('CAT_API_KEY')->notEmpty();
 
 define('PROJECT_ROOT', realpath(__DIR__ . '/../../'));