diff --git a/public/assets/stp_image.jpg b/public/assets/stp_image.jpg
new file mode 100644
index 0000000..c39b546
Binary files /dev/null and b/public/assets/stp_image.jpg differ
diff --git a/public/assets/stp_image.png b/public/assets/stp_image.png
deleted file mode 100644
index 05e6625..0000000
Binary files a/public/assets/stp_image.png and /dev/null differ
diff --git a/src/constants.ts b/src/constants.ts
index 850ea62..cd9a826 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -19,8 +19,8 @@ export const SHARE_TARGET_PICKER_FIXED_ARGUMENT_LIST = [
     label: 'image',
     value: {
       type: 'image',
-      originalContentUrl: `${base}/assets/stp_image.png`,
-      previewImageUrl: `${base}/assets/stp_image.png`,
+      originalContentUrl: `${base}/assets/stp_image.jpg`,
+      previewImageUrl: `${base}/assets/stp_image.jpg`,
     },
   },
   {
@@ -28,7 +28,7 @@ export const SHARE_TARGET_PICKER_FIXED_ARGUMENT_LIST = [
     value: {
       type: 'video',
       originalContentUrl: `${base}/assets/stp_video.mp4`,
-      previewImageUrl: `${base}/assets/stp_video.mp4`,
+      previewImageUrl: `${base}/assets/stp_image.jpg`,
       trackingId: 'track-id',
     },
   },