diff --git a/hosts/mirror-fsn/services/knotmirror.nix b/hosts/mirror-fsn/services/knotmirror.nix
index a8c37b1..a1eeee8 100644
--- a/hosts/mirror-fsn/services/knotmirror.nix
+++ b/hosts/mirror-fsn/services/knotmirror.nix
@@ -30,4 +30,8 @@
     after = ["postgresql.service"];
     environment.MIRROR_METRICS_LISTEN = "0.0.0.0:7100";
   };
+  services.redis.servers.knotmirror.settings = {
+    maxmemory = "8gb";
+    maxmemory-policy = "allkeys-lru";
+  };
 }