diff --git a/packaging/linux/flatpak/ai.storyteller.effectcraft.yml b/packaging/linux/flatpak/ai.storyteller.effectcraft.yml
index 7dd7a8d68..0797c5ea2 100644
--- a/packaging/linux/flatpak/ai.storyteller.effectcraft.yml
+++ b/packaging/linux/flatpak/ai.storyteller.effectcraft.yml
@@ -20,6 +20,7 @@ sdk-extensions:
   - org.freedesktop.Sdk.Extension.rust-stable
 command: effectcraft
 finish-args:
+  - --filesystem=xdg-data/ArtCraft/versions:ro
   # Display: Wayland first; X11 only when no Wayland compositor is running.
   - --socket=wayland
   - --socket=fallback-x11