diff --git a/core-deployments.yaml b/core-deployments.yaml
index 7c4be39..37ede65 100644
--- a/core-deployments.yaml
+++ b/core-deployments.yaml
@@ -109,6 +109,7 @@ spec:
   syncPolicy:
     syncOptions:
     - CreateNamespace=true
+    - ServerSideApply=true
 
     automated:
       selfHeal: false
diff --git a/prometheus/values.yaml b/prometheus/values.yaml
index 36cdbaf..be01d39 100644
--- a/prometheus/values.yaml
+++ b/prometheus/values.yaml
@@ -5,7 +5,6 @@ alertmanager:
       repository: aaronriedel/alertmanager
       tag: "latest"
     replicas: 2
-    externalUrl: alertmanager.services.yolokube.de
   config:
     global:
       resolve_timeout: 5m
@@ -105,7 +104,6 @@ prometheus:
     annotations:
       nginx.org/basic-auth-secret: prometheus-basic-auth-secret
   prometheusSpec:
-    externalUrl: prometheus.services.yolokube.de
     replicas: 2
   servicePerReplica:
     enabled: true
\ No newline at end of file