diff --git a/contrib/nuke-graph-directory.sh b/contrib/nuke-graph-directory.sh
index 5eeb45c8bd..fbe85e1e21 100755
--- a/contrib/nuke-graph-directory.sh
+++ b/contrib/nuke-graph-directory.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 
 dir="$1"