diff --git a/assets/Nature_Gehrig_YouTube_cover_yt.jpg b/assets/Nature_Gehrig_YouTube_cover_yt.jpg
new file mode 100644
index 0000000..f3e9ec5
Binary files /dev/null and b/assets/Nature_Gehrig_YouTube_cover_yt.jpg differ
diff --git a/assets/thumbnail_yt.png b/assets/thumbnail_yt.png
deleted file mode 100644
index 06d3d83..0000000
Binary files a/assets/thumbnail_yt.png and /dev/null differ
diff --git a/readme.md b/readme.md
index 8da3fdf..4b014b7 100644
--- a/readme.md
+++ b/readme.md
@@ -2,7 +2,7 @@
 
 <p align="center">
 <a href="https://youtu.be/dwzGhMQCc4Y">
-  <img src="assets/thumbnail_yt.png" alt="DAGR" width="500"/>
+  <img src="assets/Nature_Gehrig_YouTube_cover_yt.jpg" alt="DAGR" width="500"/>
 </a>
 </p>