diff --git a/modules/binary-caches.nix b/modules/binary-caches.nix
index f1fee1d..9b3d84b 100644
--- a/modules/binary-caches.nix
+++ b/modules/binary-caches.nix
@@ -12,24 +12,15 @@
       ];
       substituters = [
         "https://microvm.cachix.org"
-        "https://dump-dvb.cachix.org"
-        "https://tlm-solutions.cachix.org"
         "https://nix-community.cachix.org"
-        "https://hydra.hq.c3d2.de"
       ];
       trusted-substituters = [
         "https://microvm.cachix.org"
-        "https://dump-dvb.cachix.org"
-        "https://tlm-solutions.cachix.org"
         "https://nix-community.cachix.org"
-        "https://hydra.hq.c3d2.de"
       ];
       trusted-public-keys = [
         "microvm.cachix.org-1:oXnBc6hRE3eX5rSYdRyMYXnfzcCxC7yKPTbZXALsqys="
-        "dump-dvb.cachix.org-1:+Dq7gqpQG4YlLA2X3xJsG1v3BrlUGGpVtUKWk0dTyUU="
-        "tlm-solutions.cachix.org-1:J7qT6AvoNWPSj+59ed5bNESj35DLJNaROqga1EjVIoA="
         "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-        "hydra.hq.c3d2.de:KZRGGnwOYzys6pxgM8jlur36RmkJQ/y8y62e52fj1ps="
       ];
     };
   };