diff --git a/config/settings.py b/config/settings.py
index ca6e1f9..66b2f1f 100644
--- a/config/settings.py
+++ b/config/settings.py
@@ -199,7 +199,7 @@ LLM_CONFIG = {
     'API_KEY': os.environ.get('VOLCENGINE_API_KEY', ''),
     'MODEL_NAME': os.environ.get('VOLCENGINE_MODEL_NAME', 'doubao-seed-1-6-lite-251015'),
     'IMAGE_MODEL_NAME': os.environ.get('VOLCENGINE_IMAGE_MODEL_NAME', 'doubao-seedream-4-5-251128'),
-    'IMAGE_SIZE': os.environ.get('VOLCENGINE_IMAGE_SIZE', '1920x1920'),
+    'IMAGE_SIZE': os.environ.get('VOLCENGINE_IMAGE_SIZE', '2560x1440'),
 }
 
 # Swagger/OpenAPI Settings