diff --git a/services/matrix.nix b/services/matrix.nix
index b2f114e..8f5bb25 100644
--- a/services/matrix.nix
+++ b/services/matrix.nix
@@ -18,7 +18,7 @@
       port = [ service_configs.ports.matrix ];
       server_name = service_configs.https.domain;
       allow_registration = true;
-      registration_token_file = ../secrets/matrix_reg_token;
+      registration_token = lib.strings.trim (builtins.readFile ../secrets/matrix_reg_token);
 
       new_user_displayname_suffix = "";