diff --git a/bin/clone.sh b/bin/clone.sh
index d1195b3f..e40aa117 100755
--- a/bin/clone.sh
+++ b/bin/clone.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 if [ "$#" -ne 1 ] || ! [ -d "$1" ]; then
   echo "Usage: $0 DIRECTORY_TO_CLONE_INTO" >&2