diff --git a/modules/common.nix b/modules/common.nix
index 4f242fc..d940556 100755
--- a/modules/common.nix
+++ b/modules/common.nix
@@ -4,6 +4,8 @@
 
   nix.settings = {
     experimental-features = [ "nix-command" "flakes" ];
+    substituters = [ "https://nixcache.shelvacu.com" ];
+    trusted-public-keys = [ "nixcache.shelvacu.com:73u5ZGBpPRoVZfgNJQKYYBt9K9Io/jPwgUfuOLsJbsM=" ];
     trusted-users = [ "@wheel" ];
   };