diff --git a/modules/services/matrix/default.nix b/modules/services/matrix/default.nix
index 3cab50f..ace0863 100644
--- a/modules/services/matrix/default.nix
+++ b/modules/services/matrix/default.nix
@@ -42,7 +42,9 @@ in {
         base_url = "https://${matrixSubdomain}";
         server_name = cfg.serverName;
       };
-      "m.identity_server" = {};
+      "m.identity_server" = {
+        "base_url" = "https://vector.im";
+      };
       "org.matrix.msc3575.proxy" = if cfg.slidingSync.enable then {
         "url" = "https://${matrixSubdomain}";
       } else { };