diff --git a/manifests/alertmanager-alertmanager.yaml b/manifests/alertmanager-alertmanager.yaml
index be59749584e8b2fc35e409e9fd6dba251a71b5e3..351b7a0c9337b2fb9292cc8585633987a1538fc7 100644
--- a/manifests/alertmanager-alertmanager.yaml
+++ b/manifests/alertmanager-alertmanager.yaml
@@ -6,7 +6,7 @@ metadata:
     app.kubernetes.io/component: alert-router
     app.kubernetes.io/name: alertmanager
     app.kubernetes.io/part-of: kube-prometheus
-    app.kubernetes.io/version: v0.21.0
+    app.kubernetes.io/version: 0.21.0
   name: main
   namespace: monitoring
 spec:
@@ -18,11 +18,12 @@ spec:
       app.kubernetes.io/component: alert-router
       app.kubernetes.io/name: alertmanager
       app.kubernetes.io/part-of: kube-prometheus
-      app.kubernetes.io/version: v0.21.0
+      app.kubernetes.io/version: 0.21.0
   replicas: 3
+  resources: {}
   securityContext:
     fsGroup: 2000
     runAsNonRoot: true
     runAsUser: 1000
   serviceAccountName: alertmanager-main
-  version: v0.21.0
+  version: 0.21.0
diff --git a/manifests/alertmanager-secret.yaml b/manifests/alertmanager-secret.yaml
index 9868057f9b92ca72463dd55441a7eb92147786c3..c6ffb204dcc25762bcdff6d14347eb0bf7bf2841 100644
--- a/manifests/alertmanager-secret.yaml
+++ b/manifests/alertmanager-secret.yaml
@@ -6,7 +6,7 @@ metadata:
     app.kubernetes.io/component: alert-router
     app.kubernetes.io/name: alertmanager
     app.kubernetes.io/part-of: kube-prometheus
-    app.kubernetes.io/version: v0.21.0
+    app.kubernetes.io/version: 0.21.0
   name: alertmanager-main
   namespace: monitoring
 stringData:
diff --git a/manifests/alertmanager-service.yaml b/manifests/alertmanager-service.yaml
index f6cd073a4fd4255ec648b76d2daccc68e8bdf544..8c611f9f41fa51209b064c607fb63009cad8ab5d 100644
--- a/manifests/alertmanager-service.yaml
+++ b/manifests/alertmanager-service.yaml
@@ -6,7 +6,7 @@ metadata:
     app.kubernetes.io/component: alert-router
     app.kubernetes.io/name: alertmanager
     app.kubernetes.io/part-of: kube-prometheus
-    app.kubernetes.io/version: v0.21.0
+    app.kubernetes.io/version: 0.21.0
   name: alertmanager-main
   namespace: monitoring
 spec:
diff --git a/manifests/alertmanager-serviceAccount.yaml b/manifests/alertmanager-serviceAccount.yaml
index 4403e398d80188c06dc27d542f6247786c10631c..5a645515f8f1e8d1cb8f92cae76c78f79e1916d2 100644
--- a/manifests/alertmanager-serviceAccount.yaml
+++ b/manifests/alertmanager-serviceAccount.yaml
@@ -6,6 +6,6 @@ metadata:
     app.kubernetes.io/component: alert-router
     app.kubernetes.io/name: alertmanager
     app.kubernetes.io/part-of: kube-prometheus
-    app.kubernetes.io/version: v0.21.0
+    app.kubernetes.io/version: 0.21.0
   name: alertmanager-main
   namespace: monitoring
diff --git a/manifests/alertmanager-serviceMonitor.yaml b/manifests/alertmanager-serviceMonitor.yaml
index f6f22d86cf3ac64afbed12a5fd0b3b4143056e7a..6ff4570544c5bb3f37430d847e5bae6e268b0753 100644
--- a/manifests/alertmanager-serviceMonitor.yaml
+++ b/manifests/alertmanager-serviceMonitor.yaml
@@ -5,7 +5,7 @@ metadata:
     app.kubernetes.io/component: alert-router
     app.kubernetes.io/name: alertmanager
     app.kubernetes.io/part-of: kube-prometheus
-    app.kubernetes.io/version: v0.21.0
+    app.kubernetes.io/version: 0.21.0
   name: alertmanager
   namespace: monitoring
 spec: