diff --git a/client/ayon_maya/plugins/publish/extract_thumbnail.py b/client/ayon_maya/plugins/publish/extract_thumbnail.py
index 3897a403..9f6f18ec 100644
--- a/client/ayon_maya/plugins/publish/extract_thumbnail.py
+++ b/client/ayon_maya/plugins/publish/extract_thumbnail.py
@@ -74,7 +74,7 @@ def process(self, instance):
 
         representation = {
             "name": "thumbnail",
-            "ext": "jpg",
+            "ext": "png",
             "files": thumbnail,
             "stagingDir": dst_staging,
             "thumbnail": True