diff --git a/configure_build.sh b/configure_build.sh
index 92975f1..8f886de 100755
--- a/configure_build.sh
+++ b/configure_build.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Setup steps to preform before the actual build
 INSTANCE_HOST=${1:-pl.example.com}
 TREEBIRD_HOST=${2:-treebird.example.com}