diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 9c6659e3..20a5aa7a 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -19,10 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: DeterminateSystems/nix-installer-action@main
-      - uses: cachix/cachix-action@v14
-        with:
-          name: kairos
-          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+      - uses: DeterminateSystems/magic-nix-cache-action@main
 
       - name: System Info
         run: |
diff --git a/flake.nix b/flake.nix
index 3197c137..e3a7fd41 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,14 +5,10 @@
     extra-substituters = [
       "https://crane.cachix.org"
       "https://nix-community.cachix.org"
-      "https://kairos.cachix.org"
-      "https://casper-cache.marijan.pro"
     ];
     extra-trusted-public-keys = [
       "crane.cachix.org-1:8Scfpmn9w+hGdXH/Q9tTLiYAE/2dnJYRJP7kl80GuRk="
       "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-      "kairos.cachix.org-1:1EqnyWXEbd4Dn1jCbiWOF1NLOc/bELx+wuqk0ZpbeqQ="
-      "casper-cache.marijan.pro:XIDjpzFQTEuWbnRu47IqSOy6IqyZlunVGvukNROL850="
     ];
   };