diff --git a/src/core/config.js b/src/core/config.js
index f79d6d2..d512cfa 100644
--- a/src/core/config.js
+++ b/src/core/config.js
@@ -20,7 +20,7 @@ export const TILE_FOLDER = path.join(__dirname, `./${TILE_FOLDER_REL}`);
 
 export const ASSET_SERVER = process.env.ASSET_SERVER || '.';
 
-export const CAPTCHA_URL = process.env.CAPTCHA_URL || 'http://localhost:8080';
+export const CAPTCHA_URL = process.env.CAPTCHA_URL || '';
 
 export const USE_XREALIP = process.env.USE_XREALIP || false;