diff --git a/system/nix/substituters.nix b/system/nix/substituters.nix
index d444ddb..5a04bb6 100644
--- a/system/nix/substituters.nix
+++ b/system/nix/substituters.nix
@@ -3,21 +3,14 @@
     substituters = [
       # high priority since it's almost always used
       "https://cache.nixos.org?priority=10"
-
-      "https://attic.xuyh0120.win/lantian"
       "https://chaotic-nyx.cachix.org/"
-      "https://fufexan.cachix.org"
       "https://niri.cachix.org"
       "https://nix-community.cachix.org"
     ];
 
     trusted-public-keys = [
       "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
-
       "chaotic-nyx.cachix.org-1:HfnXSw4pj95iI/n17rIDy40agHj12WfF+Gqk6SonIT8="
-      "fufexan.cachix.org-1:LwCDjCJNJQf5XD2BV+yamQIMZfcKWR9ISIFy5curUsY="
-      "lantian:EeAUQ+W+6r7EtwnmYjeVwx5kOGEBpjlBfPlzGlTNvHc="
-      "someone.cachix.org-1:2K7KEjzbd3U+qMQRte/DGqttosw8EGgGVvu8vKu8D6A="
       "niri.cachix.org-1:Wv0OmO7PsuocRKzfDoJ3mulSl7Z6oezYhGhR+3W2964="
       "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
     ];