diff --git a/services/transmission.nix b/services/transmission.nix
index e78cb07..8f29018 100644
--- a/services/transmission.nix
+++ b/services/transmission.nix
@@ -67,7 +67,7 @@ in {
         };
 
         # automatically allow transmission.settings.peer-port
-        openFirewall = true;
+        openPeerPorts = true;
       }
       // (optionalAttrs (cfg.secretConfigFile != null) {
         credentialsFile = cfg.secretConfigFile;