diff --git a/hu.kramo.Cartridges.json b/hu.kramo.Cartridges.json
index 82130da..40a20d3 100644
--- a/hu.kramo.Cartridges.json
+++ b/hu.kramo.Cartridges.json
@@ -10,12 +10,12 @@
         "--device=dri",
         "--socket=wayland",
         "--talk-name=org.freedesktop.Flatpak",
-        "--filesystem=~/.steam/steam/",
-        "--filesystem=xdg-config/heroic/",
-        "--filesystem=xdg-data/bottles/",
-        "--filesystem=~/.var/app/com.valvesoftware.Steam/data/Steam/",
-        "--filesystem=~/.var/app/com.heroicgameslauncher.hgl/config/heroic/",
-        "--filesystem=~/.var/app/com.usebottles.bottles/data/bottles/"
+        "--filesystem=~/.steam/steam/:ro",
+        "--filesystem=xdg-config/heroic/:ro",
+        "--filesystem=xdg-data/bottles/:ro",
+        "--filesystem=~/.var/app/com.valvesoftware.Steam/data/Steam/:ro",
+        "--filesystem=~/.var/app/com.heroicgameslauncher.hgl/config/heroic/:ro",
+        "--filesystem=~/.var/app/com.usebottles.bottles/data/bottles/:ro"
     ],
     "cleanup" : [
         "/include",