diff --git a/scripts/combine.lua b/scripts/combine.lua
index 652a0fd..85b4f26 100644
--- a/scripts/combine.lua
+++ b/scripts/combine.lua
@@ -24,7 +24,7 @@ ngx.log(ngx.INFO, 'REQ_BODY -> ', ngx.req.get_body_data())
 local images = req_body["payload"]["images"]
 
 local combined_uuid = uuid.generate_v4()
-local combined = file_dir .. "/" .. combined_uuid .. ".png";
+local combined = file_dir .. "/" .. combined_uuid .. ".jpeg";
 
 local len = table.getn(images)
 if len == 0 then