diff --git a/modules/nix-common/default.nix b/modules/nix-common/default.nix
index f8d145f..7efe506 100644
--- a/modules/nix-common/default.nix
+++ b/modules/nix-common/default.nix
@@ -50,6 +50,7 @@ in
           "https://marcus7070.cachix.org"
           "https://devenv.cachix.org"
           "https://elixir-tools.cachix.org"
+          "https://staging.attic.rs/attic-ci"
         ];
 
         trusted-public-keys = [
@@ -57,6 +58,7 @@ in
           "marcus7070.cachix.org-1:JawxHSgnYsgNYJmNqZwvLjI4NcOwrcEZDToWlT3WwXw="
           "devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw="
           "elixir-tools.cachix.org-1:GfK9E139Ysi+YWeS1oNN9OaTfQjqpLwlBaz+/73tBjU="
+          "attic-ci:U5Sey4mUxwBXM3iFapmP0/ogODXywKLRNgRPQpEXxbo="
         ];
         experimental-features = [
           "nix-command"