diff --git a/backend/kustomize/base/database/kustomization.yaml b/backend/kustomize/base/database/kustomization.yaml
index 4f00f0a32ad21a5c1ec0aa19fc18c31e0c472946..5971848234bf7baf263e5d05c0d38de3e280d3d4 100644
--- a/backend/kustomize/base/database/kustomization.yaml
+++ b/backend/kustomize/base/database/kustomization.yaml
@@ -7,3 +7,4 @@ namePrefix: database-
 commonLabels:
   app.kubernetes.io/name: postgresql
   app.kubernetes.io/component: database
+  app.kubernetes.io/managed-by: kustomize
diff --git a/backend/kustomize/base/kustomization.yaml b/backend/kustomize/base/kustomization.yaml
index 863e61003372f9bec5dbc608f157f534b876e7fd..77deb384575f3b38e52f4b3fde154a686ba382f2 100644
--- a/backend/kustomize/base/kustomization.yaml
+++ b/backend/kustomize/base/kustomization.yaml
@@ -6,3 +6,4 @@ resources:
 namePrefix: oetzi-
 commonLabels:
   app.kubernetes.io/part-of: oetzi
+  app.kubernetes.io/managed-by: kustomize
diff --git a/backend/kustomize/base/webserver/kustomization.yaml b/backend/kustomize/base/webserver/kustomization.yaml
index fac5e68ce9e095d68b8ff436d4e75009a037caa1..bc21d8802ae2bdec8286a9d730a739c415afa863 100644
--- a/backend/kustomize/base/webserver/kustomization.yaml
+++ b/backend/kustomize/base/webserver/kustomization.yaml
@@ -7,3 +7,4 @@ namePrefix: webserver-
 commonLabels:
   app.kubernetes.io/name: nodejs
   app.kubernetes.io/component: webserver
+  app.kubernetes.io/managed-by: kustomize
diff --git a/backend/kustomize/overlays/dev/kustomization.yaml b/backend/kustomize/overlays/dev/kustomization.yaml
index bfaf3679aa87d94a1a16ab47f04a4d064225e2bf..8c65202f309dacadd6c4c5aa92726b4638dc8a16 100644
--- a/backend/kustomize/overlays/dev/kustomization.yaml
+++ b/backend/kustomize/overlays/dev/kustomization.yaml
@@ -3,6 +3,7 @@ resources:
   - ../../base
 commonLabels:
   environment: dev
+  app.kubernetes.io/managed-by: kustomize
 patchesStrategicMerge:
   - database.deployment.yaml
   - webserver.deployment.yaml
diff --git a/backend/kustomize/overlays/stg/kustomization.yaml b/backend/kustomize/overlays/stg/kustomization.yaml
index 85bf48f3b3a634267b43a735aded8bb35dd79592..f00dcf7bdb0d4ea4109deddad54c055863e399a5 100644
--- a/backend/kustomize/overlays/stg/kustomization.yaml
+++ b/backend/kustomize/overlays/stg/kustomization.yaml
@@ -3,6 +3,7 @@ resources:
   - ../../base
 commonLabels:
   environment: stg
+  app.kubernetes.io/managed-by: kustomize
 patchesStrategicMerge:
   - database.deployment.yaml
   - webserver.deployment.yaml