diff --git a/.circleci/config.yml b/.circleci/config.yml
index c6e960ae2ecd16ff7de29bd300a4b46da99743a8..6792ed3e0c429f38be66e9b2a26349bd6680d0c1 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -27,12 +27,12 @@ jobs:
     environment:
       # Add privatestorage's and haskell.nix[1] nix caches for builds.  [1]
       # https://input-output-hk.github.io/haskell.nix/tutorials/getting-started/#setting-up-the-binary-cache
-      EXTRA_SUBSTITUTERS: "http://saxtons.private.storage/ https://hydra.iohk.io/"
+      EXTRA_SUBSTITUTERS: "https://hydra.iohk.io/"
 
       # We needed to explictly specify the key for cache.nixos.org until we
       # are using a version of nix that has
       # https://github.com/NixOS/nix/commit/ff4dea63c9403880500f82ce273713ecf793d2d9
-      TRUSTED_PUBLIC_KEYS: "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= saxtons.private.storage:MplOcEH8G/6mRlhlKkbA8GdeFR3dhCFsSszrspE/ZwY= hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
+      TRUSTED_PUBLIC_KEYS: "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ="
 
     steps:
       # Get *our* source code.