diff --git a/conf/resin.conf b/conf/resin.conf
index 29c3bb4..fc7b05c 100644
--- a/conf/resin.conf
+++ b/conf/resin.conf
@@ -64,6 +64,7 @@
     <!-- define the servers in the cluster -->
     <server id="" address="127.0.0.1" port="5079">
       <watchdog-port>5078</watchdog-port>
+      <jvm-arg>-Djava.awt.headless=true</jvm-arg>
     </server>
 
     <!-- includes the web-app-default for default web-app behavior -->