diff --git a/cluster/kubernetes/update_test.go b/cluster/kubernetes/update_test.go
index ea2ed46e8..f5ae8c8c9 100644
--- a/cluster/kubernetes/update_test.go
+++ b/cluster/kubernetes/update_test.go
@@ -471,7 +471,7 @@ spec:
       labels:
         name: authfe
       annotations:
-        prometheus.io.port: "8080"
+        prometheus.io/port: "8080"
     spec:
       # blank comment spacers in the following
       containers:
@@ -522,7 +522,7 @@ spec:
       labels:
         name: authfe
       annotations:
-        prometheus.io.port: "8080"
+        prometheus.io/port: "8080"
     spec:
       # blank comment spacers in the following
       containers:
diff --git a/deploy/flux-deployment.yaml b/deploy/flux-deployment.yaml
index 6af51af25..3f6a77990 100644
--- a/deploy/flux-deployment.yaml
+++ b/deploy/flux-deployment.yaml
@@ -13,7 +13,7 @@ spec:
   template:
     metadata:
       annotations:
-        prometheus.io.port: "3031" # tell prometheus to scrape /metrics endpoint's port.
+        prometheus.io/port: "3031" # tell prometheus to scrape /metrics endpoint's port.
       labels:
         name: flux
     spec: