diff --git a/manifests/prometheus/prometheus-k8s.yaml b/manifests/prometheus/prometheus-k8s.yaml
index 421c024d14a1abace36792b35852bd4d4be92a48..84bd02a8bc233dcbbf5fff322aedf98cb3f6dff8 100644
--- a/manifests/prometheus/prometheus-k8s.yaml
+++ b/manifests/prometheus/prometheus-k8s.yaml
@@ -21,7 +21,7 @@ spec:
       # memory. Modify based on your target and time-series count for
       # production use. This value is mainly meant for demonstration/testing
       # purposes.
-      memory: 400Mi
+      memory: 4Gi
   alerting:
     alertmanagers:
     - namespace: monitoring