diff --git a/gunther/configuration.nix b/gunther/configuration.nix
index 948ef49..b779e3b 100755
--- a/gunther/configuration.nix
+++ b/gunther/configuration.nix
@@ -183,13 +183,13 @@
   programs.zsh.enable = true;
   users.defaultUserShell = pkgs.zsh;
 
-  # Binary Cache for Haskell.nix
-  nix.settings.trusted-public-keys = [
-    "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
-  ];
+  # # Binary Cache for Haskell.nix
+  # nix.settings.trusted-public-keys = [
+  #   "hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
+  # ];
   nix.settings.substituters = [
     "https://aseipp-nix-cache.global.ssl.fastly.net" 
-    "https://cache.iog.io"
+    # "https://cache.iog.io"
   ];
 
   # environment variables