diff --git a/filesystem/resources/pbuilder/hooks/D60no-man-db-rebuild b/filesystem/resources/pbuilder/hooks/D60no-man-db-rebuild
index 946d68e..bd73003 100755
--- a/filesystem/resources/pbuilder/hooks/D60no-man-db-rebuild
+++ b/filesystem/resources/pbuilder/hooks/D60no-man-db-rebuild
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Don't rebuild man-db
 
 echo "I: Preseed man-db/auto-update to false"
diff --git a/filesystem/resources/pbuilder/hooks/D70update b/filesystem/resources/pbuilder/hooks/D70update
index 0226518..e844190 100755
--- a/filesystem/resources/pbuilder/hooks/D70update
+++ b/filesystem/resources/pbuilder/hooks/D70update
@@ -1,2 +1,2 @@
-#!/bin/sh
+#!/bin/bash
 /usr/bin/apt-get update