diff --git a/manifests/postgres-instance.yaml b/manifests/postgres-instance.yaml
index d503cbb..9249405 100644
--- a/manifests/postgres-instance.yaml
+++ b/manifests/postgres-instance.yaml
@@ -11,12 +11,12 @@ metadata:
   # namespace in k8s where the pods will be created
   namespace: zalando-postgres
 spec:
-  dockerImage: registry.opensource.zalan.do/acid/spilo-11:1.6-p1
+  dockerImage: registry.opensource.zalan.do/acid/spilo-cdp-12:1.6-p16
   # required parameter from patroni
   teamId: "Postgres"
   # size and accessmode(=defined in storageclass) for persistent volume claim
   volume:
-    size: 15Gi
+    size: 5Gi
     storageClass: standard
   # number of pods
   # 1 is master, others replicas
@@ -32,27 +32,29 @@ spec:
     foo: zalando  # dbname: owner
   # needed for shared_memory, in docker default=64mb 
   enableShmVolume: true
+  enableMasterLoadBalancer: true
+  enableReplicaLoadBalancer: true
   allowedSourceRanges:  # load balancers' source ranges for both master and replica services
   - 192.168.0.0/16
   postgresql:
-    version: "11"
+    version: "12"
     # parameters for postgresql.conf
     # can be edited after kubectl apply for example and restart spilo service
     parameters:
       listen_addresses: '*'
-      shared_buffers: "128MB"
-      max_connections: "100"
+      shared_buffers: "32MB"
+      max_connections: "10"
       log_statement: "all"
       log_destination: "stderr"
       log_directory: "/var/log/postgresql"
   # define the minimum and limit of resources of an postgres database container 
   resources:
     requests:
-      cpu: 100m
-      memory: 275Mi
+      cpu: 10m
+      memory: 100Mi
     limits:
-      cpu: 300m
-      memory: 300Mi
+      cpu: 500m
+      memory: 500Mi
   # parameters for initializing database    
   patroni:
     initdb:
@@ -63,5 +65,4 @@ spec:
     # entries for host-based access file in postgres  
     pg_hba:
     - hostssl all all 0.0.0.0/0 scram-sha-256
-    - host    all all 0.0.0.0/0 scram-sha-256
-    - host    all all 0.0.0.0/0 md5
\ No newline at end of file
+    - host    all all 0.0.0.0/0 scram-sha-256
\ No newline at end of file
diff --git a/manifests/postgres-operator.yaml b/manifests/postgres-operator.yaml
index 5561024..93b9cc4 100644
--- a/manifests/postgres-operator.yaml
+++ b/manifests/postgres-operator.yaml
@@ -21,7 +21,7 @@ spec:
       # every postgres-operator Deployment Pod contains one container
       containers:
       - name: postgres-operator
-        image: registry.opensource.zalan.do/acid/postgres-operator:latest
+        image: registry.opensource.zalan.do/acid/postgres-operator:v1.3.1
         imagePullPolicy: IfNotPresent
         # set requested and limited resources for the container
         resources:
diff --git a/reset_postgres_operator_setup.sh b/reset_postgres_operator_setup.sh
index 2a710c0..af15a89 100644
--- a/reset_postgres_operator_setup.sh
+++ b/reset_postgres_operator_setup.sh
@@ -16,4 +16,14 @@ kubectl delete postgresql postgres-instance -n zalando-postgres
 
 sleep 3
 
-kubectl delete service postgres-instance postgres-instance-config postgres-instance-repl -n zalando-postgres
\ No newline at end of file
+kubectl delete service postgres-instance postgres-instance-config postgres-instance-repl -n zalando-postgres
+
+kubectl delete deployment postgres-operator -n zalando-postgres
+
+kubectl delete statefulset postgres-instance -n zalando-postgres
+
+kubectl delete pvc pgdata-postgres-instance-0 -n zalando-postgres
+
+kubectl delete pvc pgdata-postgres-instance-1 -n zalando-postgres
+
+kubectl delete pvc pgdata-postgres-instance-2 -n zalando-postgres
\ No newline at end of file
diff --git a/storageclasses_longhorn/default-gce.yml b/storageclasses_longhorn/default-gce.yml
new file mode 100644
index 0000000..6b01d41
--- /dev/null
+++ b/storageclasses_longhorn/default-gce.yml
@@ -0,0 +1,8 @@
+kind: StorageClass
+apiVersion: storage.k8s.io/v1
+metadata:
+  name: standard
+  annotations:
+provisioner: kubernetes.io/gce-pd
+parameters:
+  type: pd-standard
\ No newline at end of file