diff --git a/manifests/prometheus/prometheus-k8s.yaml b/manifests/prometheus/prometheus-k8s.yaml
index 63e9c3f7c027b09d5dfbcc1b61e10d68d4895001..df432c403aa60ef870fac381fb2d9128473d01fa 100644
--- a/manifests/prometheus/prometheus-k8s.yaml
+++ b/manifests/prometheus/prometheus-k8s.yaml
@@ -10,7 +10,7 @@ spec:
   serviceAccountName: prometheus-k8s
   serviceMonitorSelector:
     matchExpression:
-    - {key: k8s-apps, operator: Exists}
+    - {key: k8s-app, operator: Exists}
   ruleSelector:
     matchLabels:
       role: prometheus-rulefiles