diff --git a/atmosphere/flows.py b/atmosphere/flows.py
index c54c82e..aac1e74 100644
--- a/atmosphere/flows.py
+++ b/atmosphere/flows.py
@@ -164,6 +164,7 @@
                     "ports": [
                         {
                             "name": "metrics",
+                            "protocol": "TCP",
                             "port": 9150,
                             "targetPort": 9150,
                         }