diff --git a/modules/nix.nix b/modules/nix.nix
index e6faa54..e67beac 100644
--- a/modules/nix.nix
+++ b/modules/nix.nix
@@ -41,10 +41,11 @@ lib.my.makeSwitch {
         "https://mirror.sjtu.edu.cn/nix-channels/store"
         "https://mirrors.ustc.edu.cn/nix-channels/store"
         "https://nix-community.cachix.org"
-        "https://cache.nixos.org"
+        "https://cache.garnix.io"
       ];
       trusted-public-keys = [
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g="
       ];
     };