diff --git a/etc/diskspace/clean-old-stack-libs.sh b/etc/diskspace/clean-old-stack-libs.sh
index 18b5606b..761f9a67 100755
--- a/etc/diskspace/clean-old-stack-libs.sh
+++ b/etc/diskspace/clean-old-stack-libs.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 set -e