diff --git a/src/bot.js b/src/bot.js
index dd804d1..b076dbc 100644
--- a/src/bot.js
+++ b/src/bot.js
@@ -33,6 +33,11 @@ config.whitelist = Object.keys(
 ).map((x) => +x);
 
 console.info(config);
+if (!process.env.BOT_TOKEN) {
+	throw new Error(
+		"BOT_TOKEN not defined. Please, run docker container: docker run <params> <container> --env-file .env",
+	);
+}
 
 config.admins = Object.fromEntries(config.admins.map((x) => [x, true]));
 config.whitelist = Object.fromEntries(config.whitelist.map((x) => [x, true]));