diff --git a/llo-index.yml b/llo-index.yml
index c33631c..6e79a55 100644
--- a/llo-index.yml
+++ b/llo-index.yml
@@ -26,6 +26,7 @@
       points: "1" # ELO
       output:
         log: "console"
+        mimetype: "text/plain"
   llospec1:
     display_name: "title1"
     swarmlabservice: "os2"