diff --git a/src/config.ts b/src/config.ts
index f26ddbb..e98f349 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -15,7 +15,7 @@ export const config: IConfig = {
   chatPrivateTiggerKeyword:
     configFile.chatPrivateTiggerKeyword ||
     // Try compatible with previous designs
-    (configFile?.botConfig as Array<Map<string, string>>).reduce(
+    (configFile?.botConfig as Array<Map<string, string>>)?.reduce(
       (prev: string, curr: Map<string, string>) =>
         curr.get("trigger_keywords") || "",
       ""