diff --git a/dot_config/nix/nix.conf b/dot_config/nix/nix.conf
index c7d7291..6b39021 100644
--- a/dot_config/nix/nix.conf
+++ b/dot_config/nix/nix.conf
@@ -1 +1,3 @@
 experimental-features = nix-command flakes
+substituters = https://cache.nixos.org https://nix-shell.cachix.org https://php-src-nix.cachix.org
+trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= nix-shell.cachix.org-1:kat3KoRVbilxA6TkXEtTN9IfD4JhsQp1TPUHg652Mwc= php-src-nix.cachix.org-1:3IMVbxfljrbI1NZjuML/2eHLsmHEXfzKGY0kEA20qWY=