diff --git a/src/bot.ts b/src/bot.ts
index f42f971..ce9eb0b 100755
--- a/src/bot.ts
+++ b/src/bot.ts
@@ -12,7 +12,7 @@ import { declare_commands, handle_autocomplete, handle_command } from "./lib/com
 
 
 const log = log_from(import.meta);
-const subjects = fs.readFileSync('/modules.conf', 'utf-8').split('\n');
+const subjects = new Set(fs.readFileSync('/modules.conf', 'utf-8').split('\n'));
 
 async function main() {
 	const debug_server = Deno.env.get("DEBUG");