diff --git a/packaging/linux/flatpak/ai.storyteller.deckcraft.yml b/packaging/linux/flatpak/ai.storyteller.deckcraft.yml
index b99365c2..8c1d1e24 100644
--- a/packaging/linux/flatpak/ai.storyteller.deckcraft.yml
+++ b/packaging/linux/flatpak/ai.storyteller.deckcraft.yml
@@ -18,6 +18,7 @@ sdk-extensions:
   - org.freedesktop.Sdk.Extension.rust-stable
 command: deckcraft
 finish-args:
+  - --filesystem=xdg-data/ArtCraft/versions:ro
   # Display: Wayland first; X11 only when no Wayland compositor is running.
   - --socket=wayland
   - --socket=fallback-x11