diff --git a/src/store/generationPreferenceStore.ts b/src/store/generationPreferenceStore.ts
index 29c40281..3bac0273 100644
--- a/src/store/generationPreferenceStore.ts
+++ b/src/store/generationPreferenceStore.ts
@@ -49,7 +49,7 @@ function createInitialImagePreference(): ImageGenerationPreference {
   return {
     type: "image",
     model: createPopiserverDefaultImageModel(),
-    aspectRatio: "16:9",
+    aspectRatio: "9:16",
     resolution: "1K",
     imageCount: 1,
   };
@@ -59,7 +59,7 @@ function createInitialVideoPreference(): VideoGenerationPreference {
   return {
     type: "video",
     model: createPopiserverDefaultVideoModel(),
-    aspectRatio: "16:9",
+    aspectRatio: "9:16",
     resolution: DEFAULT_VIDEO_RESOLUTION,
     durationSeconds: DEFAULT_VIDEO_DURATION_SECONDS,
     soundEnabled: true,