diff --git a/os/common.nix b/os/common.nix
index ddecd63..b53dd21 100644
--- a/os/common.nix
+++ b/os/common.nix
@@ -3,7 +3,7 @@
   nix.package = pkgs.nixVersions.latest;
   nix.settings = {
     experimental-features = [ "nix-command" "flakes" ];
-    extra-substituters = [ "https://nixcache.antoinevaure.fr/" ];
+    extra-substituters = [ "https://nixcache.antoinevaure.fr/?priority=50" ];
     extra-trusted-public-keys = [ "nixcache.antoinevaure.fr:KbcKN97zPmsDUCNAXj5g1/WWJEk2WnyMgI6CmwgX/QY=" ];
   };
   nixpkgs.config.allowUnfree = true;