diff --git a/modules/dev-services.nix b/modules/dev-services.nix
index 547a039..639c359 100644
--- a/modules/dev-services.nix
+++ b/modules/dev-services.nix
@@ -202,7 +202,7 @@ in
       package = pkgs-unstable.mautrix-slack or (pkgs-unstable.callPackage ../pkgs/mautrix-slack {});
 
       matrix = {
-        homeserverUrl = "http://localhost:${toString cfg.matrix.port}";
+        homeserverUrl = "http://127.0.0.1:${toString cfg.matrix.port}";
         serverName = cfg.matrix.serverName;
       };