diff --git a/vector_engine_node.py b/vector_engine_node.py
index 72b16f8..6b57614 100644
--- a/vector_engine_node.py
+++ b/vector_engine_node.py
@@ -121,7 +121,7 @@ class VectorEngineGemini(VectorEngineBase):
                     "multiline": True,
                     "default": "You are an AI assistant skilled in generating images and editing pictures."
                 }),
-                "aspect_ratio": (["1:1", "2:3", "3:2", "4:3", "3:4", "16:9", "9:16"], {
+                "aspect_ratio": (["Auto"", 1:1", "2:3", "3:2", "4:3", "3:4", "16:9", "9:16"], {
                     "default": "1:1"
                 }),
                 "image_size": (["1K", "2K", "4K"], {
@@ -194,7 +194,7 @@ class VectorEngineGemini(VectorEngineBase):
                 "generationConfig": {
                     "responseModalities": ["TEXT", "IMAGE"],
                     "imageConfig": {
-                        "aspectRatio": aspect_ratio,
+                        "aspectRatio": "" if aspect_ratio == "Auto" else aspect_ratio,
                         "imageSize": image_size
                     }
                 }