diff --git a/services/monitoring/tempo.nix b/services/monitoring/tempo.nix
index e5ecfc4..ef0c4ae 100644
--- a/services/monitoring/tempo.nix
+++ b/services/monitoring/tempo.nix
@@ -5,6 +5,7 @@
     settings = {
       server = {
         http_listen_port = 3200;
+        grpc_listen_port = 3201;
       };
       distributor = {
         receivers = {