diff --git a/hosts/fw.cloonar.com/configuration.nix b/hosts/fw.cloonar.com/configuration.nix
index 9a3cdff..dab9a37 100644
--- a/hosts/fw.cloonar.com/configuration.nix
+++ b/hosts/fw.cloonar.com/configuration.nix
@@ -47,6 +47,10 @@
     "openssl-1.1.1w"
   ];
 
+  nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [
+    "mongodb"
+  ];
+
   time.timeZone = "Europe/Vienna";
 
   services.logind.extraConfig = "RuntimeDirectorySize=2G";