diff --git a/eeg_backend/src/main/resources/application-dev.yml b/eeg_backend/src/main/resources/application-dev.yml
index 6a628c0..90503b3 100644
--- a/eeg_backend/src/main/resources/application-dev.yml
+++ b/eeg_backend/src/main/resources/application-dev.yml
@@ -12,7 +12,7 @@ spring:
 jwt:
   secret: dev-only-secret-do-not-use-in-production-2025
 app:
-  cors-origins: http://localhost:4200
+  cors-origins: http://localhost:4200,https://preview.coolify.mueller-dev.com
 eda:
   simulation:
     consent-delay-ms: 3000