diff --git a/polymer/synthesis.sh b/polymer/synthesis.sh
index 40520d1fe..db257a9b5 100755
--- a/polymer/synthesis.sh
+++ b/polymer/synthesis.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # some paths
 top=/var/www/synthesis/eduke32