diff --git a/debian/control b/debian/control
index a7b591e..92210d8 100644
--- a/debian/control
+++ b/debian/control
@@ -6,12 +6,13 @@ Build-Depends: debhelper-compat (= 13),
                libaccountsservice-dev,
                libdbus-1-dev,
                libpolkit-gobject-1-dev,
-               meson (>= 1.3.0)
+               meson (>= 1.3.0),
+               systemd-dev
 Standards-Version: 4.1.1
 
 Package: elementary-default-settings
 Architecture: all
-Depends: libglib2.0-bin, elementary-icon-theme, ${misc:Depends}
+Depends: libglib2.0-bin, elementary-icon-theme, flatpak (>= 1.17.0), ${misc:Depends}
 Replaces: libgtk-3-0
 Description: Default settings for elementary OS
  This package contains various system defaults for elementary OS.
diff --git a/debian/elementary-default-settings.postinst b/debian/elementary-default-settings.postinst
new file mode 100644
index 0000000..df772bf
--- /dev/null
+++ b/debian/elementary-default-settings.postinst
@@ -0,0 +1,8 @@
+#!/bin/sh -e
+
+# Remove the flag file that flatpak-preinstalld.service generates before the DEBHELPER token, where debhelper starts
+# that service, to make sure flatpak preinstall is executed on package update in case we add new default app
+# to the .preinstall file (see "man debhelper" for details about the DEBHELPER token)
+rm -f /var/lib/flatpak/.preinstall-finished
+
+#DEBHELPER#
diff --git a/debian/install b/debian/install
index 219987d..c908ee9 100644
--- a/debian/install
+++ b/debian/install
@@ -14,3 +14,8 @@ usr/share/glib-2.0/schemas
 usr/share/xdg-desktop-portal
 etc/netplan/01-network-manager-all.yml
 etc/NetworkManager/conf.d/10-globally-managed-devices.conf
+usr/share/flatpak/preinstall.d/
+usr/lib/systemd/system/flatpak-preinstalld.service
+var/lib/flatpak/repo/appcenter.trustedkeys.gpg
+var/lib/flatpak/repo/flathub.trustedkeys.gpg
+var/lib/flatpak/repo/config