diff --git a/manifests/alertmanager-alertmanager.yaml b/manifests/alertmanager-alertmanager.yaml
index 87f98b33..17ec2328 100644
--- a/manifests/alertmanager-alertmanager.yaml
+++ b/manifests/alertmanager-alertmanager.yaml
@@ -6,7 +6,7 @@ metadata:
   name: main
   namespace: monitoring
 spec:
-  baseImage: quay.io/prometheus/alertmanager
+  image: quay.io/prometheus/alertmanager:v0.20.0
   nodeSelector:
     kubernetes.io/os: linux
   replicas: 3
diff --git a/manifests/prometheus-prometheus.yaml b/manifests/prometheus-prometheus.yaml
index 1c8422d5..62c1c0b7 100644
--- a/manifests/prometheus-prometheus.yaml
+++ b/manifests/prometheus-prometheus.yaml
@@ -11,7 +11,7 @@ spec:
     - name: alertmanager-main
       namespace: monitoring
       port: web
-  baseImage: quay.io/prometheus/prometheus
+  image: quay.io/prometheus/prometheus:v2.15.2
   nodeSelector:
     kubernetes.io/os: linux
   podMonitorNamespaceSelector: {}