diff --git a/charts/postgres-operator/crds/operatorconfigurations.yaml b/charts/postgres-operator/crds/operatorconfigurations.yaml
index c6da405a5..58e84bd2f 100644
--- a/charts/postgres-operator/crds/operatorconfigurations.yaml
+++ b/charts/postgres-operator/crds/operatorconfigurations.yaml
@@ -510,7 +510,7 @@ spec:
                     pattern: '^(\d+m|\d+(\.\d{1,3})?)$'
                   logical_backup_docker_image:
                     type: string
-                    default: "ghcr.io/zalando/postgres-operator/logical-backup:v1.13.0"
+                    default: "ghcr.io/zalando/postgres-operator/logical-backup:v1.15.1"
                   logical_backup_google_application_credentials:
                     type: string
                   logical_backup_job_prefix:
diff --git a/charts/postgres-operator/crds/postgresqls.yaml b/charts/postgres-operator/crds/postgresqls.yaml
index 8083e5e1d..667c58efa 100644
--- a/charts/postgres-operator/crds/postgresqls.yaml
+++ b/charts/postgres-operator/crds/postgresqls.yaml
@@ -278,7 +278,6 @@ spec:
                                     items:
                                       type: string
                         weight:
-                          format: int32
                           type: integer
                   requiredDuringSchedulingIgnoredDuringExecution:
                     type: object
diff --git a/charts/postgres-operator/index.yaml b/charts/postgres-operator/index.yaml
index ad0a890b6..7128b8eb9 100644
--- a/charts/postgres-operator/index.yaml
+++ b/charts/postgres-operator/index.yaml
@@ -3,10 +3,10 @@ entries:
   postgres-operator:
   - apiVersion: v2
     appVersion: 1.15.1
-    created: "2025-12-11T12:43:37.232803735+01:00"
+    created: "2025-12-17T14:48:33.832345061+01:00"
     description: Postgres Operator creates and manages PostgreSQL clusters running
       in Kubernetes
-    digest: 64d9c1d7be7e5bc4661099806b77dc509cb547938c2de6c7105f9665e9ee0aab
+    digest: 9f3edc3d796105c02c04eaae28a78e58fb08c1847a9de012245fd6ac2c0d2c00
     home: https://github.com/zalando/postgres-operator
     keywords:
     - postgres
@@ -25,7 +25,7 @@ entries:
     version: 1.15.1
   - apiVersion: v2
     appVersion: 1.15.0
-    created: "2025-12-11T12:43:37.226030229+01:00"
+    created: "2025-12-17T14:48:33.826117296+01:00"
     description: Postgres Operator creates and manages PostgreSQL clusters running
       in Kubernetes
     digest: 002dd47647bf51fbba023bd1762d807be478cf37de7a44b80cd01ac1f20bd94a
@@ -47,7 +47,7 @@ entries:
     version: 1.15.0
   - apiVersion: v2
     appVersion: 1.14.0
-    created: "2025-12-11T12:43:37.217094172+01:00"
+    created: "2025-12-17T14:48:33.819729144+01:00"
     description: Postgres Operator creates and manages PostgreSQL clusters running
       in Kubernetes
     digest: 36e1571f3f455b213f16cdda7b1158648e8e84deb804ba47ed6b9b6d19263ba8
@@ -69,7 +69,7 @@ entries:
     version: 1.14.0
   - apiVersion: v2
     appVersion: 1.13.0
-    created: "2025-12-11T12:43:37.211148314+01:00"
+    created: "2025-12-17T14:48:33.81038602+01:00"
     description: Postgres Operator creates and manages PostgreSQL clusters running
       in Kubernetes
     digest: a839601689aea0a7e6bc0712a5244d435683cf3314c95794097ff08540e1dfef
@@ -91,7 +91,7 @@ entries:
     version: 1.13.0
   - apiVersion: v2
     appVersion: 1.12.2
-    created: "2025-12-11T12:43:37.202520969+01:00"
+    created: "2025-12-17T14:48:33.803256825+01:00"
     description: Postgres Operator creates and manages PostgreSQL clusters running
       in Kubernetes
     digest: 65858d14a40d7fd90c32bd9fc60021acc9555c161079f43a365c70171eaf21d8
@@ -113,7 +113,7 @@ entries:
     version: 1.12.2
   - apiVersion: v2
     appVersion: 1.11.0
-    created: "2025-12-11T12:43:37.197036041+01:00"
+    created: "2025-12-17T14:48:33.797369053+01:00"
     description: Postgres Operator creates and manages PostgreSQL clusters running
       in Kubernetes
     digest: 3914b5e117bda0834f05c9207f007e2ac372864cf6e86dcc2e1362bbe46c14d9
@@ -135,7 +135,7 @@ entries:
     version: 1.11.0
   - apiVersion: v2
     appVersion: 1.10.1
-    created: "2025-12-11T12:43:37.191421669+01:00"
+    created: "2025-12-17T14:48:33.791368349+01:00"
     description: Postgres Operator creates and manages PostgreSQL clusters running
       in Kubernetes
     digest: cc3baa41753da92466223d0b334df27e79c882296577b404a8e9071411fcf19c
@@ -155,4 +155,4 @@ entries:
     urls:
     - postgres-operator-1.10.1.tgz
     version: 1.10.1
-generated: "2025-12-11T12:43:37.184779748+01:00"
+generated: "2025-12-17T14:48:33.785159183+01:00"
diff --git a/charts/postgres-operator/postgres-operator-1.15.1.tgz b/charts/postgres-operator/postgres-operator-1.15.1.tgz
index 1e9373dbd..7dce6f87d 100644
Binary files a/charts/postgres-operator/postgres-operator-1.15.1.tgz and b/charts/postgres-operator/postgres-operator-1.15.1.tgz differ
diff --git a/docs/administrator.md b/docs/administrator.md
index f28bd93f0..d7cda8e8b 100644
--- a/docs/administrator.md
+++ b/docs/administrator.md
@@ -1498,7 +1498,7 @@ make docker
 
 # build in image in minikube docker env
 eval $(minikube docker-env)
-docker build -t ghcr.io/zalando/postgres-operator-ui:v1.13.0 .
+docker build -t ghcr.io/zalando/postgres-operator-ui:v1.15.1 .
 
 # apply UI manifests next to a running Postgres Operator
 kubectl apply -f manifests/
diff --git a/docs/developer.md b/docs/developer.md
index 0429f951c..b5f59c246 100644
--- a/docs/developer.md
+++ b/docs/developer.md
@@ -43,7 +43,7 @@ Build the operator with the `make docker` command. You may define the TAG
 variable to assign an explicit tag to your Docker image and the IMAGE to set
 the image name. By default, the tag is computed with
 `git describe --tags --always --dirty` and the image is
-`registry.opensource.zalan.do/acid/postgres-operator`
+`ghcr.io/zalando/postgres-operator`
 
 ```bash
 export TAG=$(git describe --tags --always --dirty)
@@ -72,7 +72,7 @@ make docker
 
 # kind
 make docker
-kind load docker-image registry.opensource.zalan.do/acid/postgres-operator:${TAG} --name <kind-cluster-name>
+kind load docker-image ghcr.io/zalando/postgres-operator:${TAG} --name <kind-cluster-name>
 ```
 
 Then create a new Postgres Operator deployment.
@@ -276,10 +276,10 @@ Examples for fake K8s objects can be found in:
 
 The operator provides reference end-to-end (e2e) tests to
 ensure various infrastructure parts work smoothly together. The test code is available at `e2e/tests`.
-The special `registry.opensource.zalan.do/acid/postgres-operator-e2e-tests-runner` image is used to run the tests. The container mounts the local `e2e/tests` directory at runtime, so whatever you modify in your local copy of the tests will be executed by a test runner. By maintaining a separate test runner image we avoid the need to re-build the e2e test image on every build. 
+The special `ghcr.io/zalando/postgres-operator-e2e-tests-runner` image is used to run the tests. The container mounts the local `e2e/tests` directory at runtime, so whatever you modify in your local copy of the tests will be executed by a test runner. By maintaining a separate test runner image we avoid the need to re-build the e2e test image on every build.
 
-Each e2e execution tests a Postgres Operator image built from the current git branch. The test
-runner creates a new local K8s cluster using [kind](https://kind.sigs.k8s.io/),
+Each e2e execution tests a Postgres Operator image built from the current git branch.
+The test runner creates a new local K8s cluster using [kind](https://kind.sigs.k8s.io/),
 utilizes provided manifest examples, and runs e2e tests contained in the `tests`
 folder. The K8s API client in the container connects to the `kind` cluster via
 the standard Docker `bridge` network. The kind cluster is deleted if tests
diff --git a/docs/reference/operator_parameters.md b/docs/reference/operator_parameters.md
index 7e7cbeaf0..5662d6b8e 100644
--- a/docs/reference/operator_parameters.md
+++ b/docs/reference/operator_parameters.md
@@ -824,7 +824,7 @@ grouped under the `logical_backup` key.
   runs `pg_dumpall` on a replica if possible and uploads compressed results to
   an S3 bucket under the key `/<configured-s3-bucket-prefix>/<pg_cluster_name>/<cluster_k8s_uuid>/logical_backups`.
   The default image is the same image built with the Zalando-internal CI
-  pipeline. Default: "ghcr.io/zalando/postgres-operator/logical-backup:v1.13.0"
+  pipeline. Default: "ghcr.io/zalando/postgres-operator/logical-backup:v1.15.1"
 
 * **logical_backup_google_application_credentials**
   Specifies the path of the google cloud service account json file. Default is empty.
diff --git a/e2e/Dockerfile b/e2e/Dockerfile
index 4ad55c136..98bbf755a 100644
--- a/e2e/Dockerfile
+++ b/e2e/Dockerfile
@@ -1,27 +1,20 @@
 # An image to run e2e tests.
 # The image does not include the tests; all necessary files are bind-mounted when a container starts.
-FROM ubuntu:20.04
+FROM python:3.11-slim
 LABEL maintainer="Team ACID @ Zalando <team-acid@zalando.de>"
 
 ENV TERM xterm-256color
 
-COPY requirements.txt ./
-
-RUN apt-get update \
-    && apt-get install --no-install-recommends -y \
-           python3 \
-           python3-setuptools \
-           python3-pip \
-           curl \
-           vim \
-    && pip3 install --no-cache-dir -r requirements.txt \
+RUN apt-get -qq -y update \
+ # https://www.psycopg.org/docs/install.html#psycopg-vs-psycopg-binary
+    && apt-get -qq -y install --no-install-recommends curl vim python3-dev \
     && curl -LO https://dl.k8s.io/release/v1.32.9/bin/linux/amd64/kubectl \
     && chmod +x ./kubectl \
     && mv ./kubectl /usr/local/bin/kubectl \
-    && apt-get clean \
+    && apt-get -qq -y clean \
     && rm -rf /var/lib/apt/lists/*
 
-# working line
-# python3 -m unittest discover -v --failfast -k test_e2e.EndToEndTestCase.test_lazy_spilo_upgrade --start-directory tests
-ENTRYPOINT ["python3", "-m", "unittest"]
-CMD ["discover","-v","--failfast","--start-directory","/tests"]
\ No newline at end of file
+COPY requirements.txt ./
+RUN pip install -r ./requirements.txt
+
+CMD ["python", "-m", "unittest", "discover", "-v", "--failfast", "--start-directory", "/tests"]
\ No newline at end of file
diff --git a/e2e/Makefile b/e2e/Makefile
index 52d24e9e5..5fa0de471 100644
--- a/e2e/Makefile
+++ b/e2e/Makefile
@@ -11,7 +11,7 @@ endif
 LOCAL_BUILD_FLAGS ?= $(BUILD_FLAGS)
 LDFLAGS ?= -X=main.version=$(VERSION)
 
-IMAGE            ?= registry.opensource.zalan.do/acid/$(BINARY)
+IMAGE            ?= ghcr.io/zalando/$(BINARY)
 VERSION          ?= $(shell git describe --tags --always --dirty)
 TAG              ?= $(VERSION)
 GITHEAD          = $(shell git rev-parse --short HEAD)
@@ -46,7 +46,7 @@ tools:
 	# install pinned version of 'kind'
 	# go install must run outside of a dir with a (module-based) Go project !
 	# otherwise go install updates project's dependencies and/or behaves differently
-	cd "/tmp" && GO111MODULE=on go install sigs.k8s.io/kind@v0.24.0
+	cd "/tmp" && GO111MODULE=on go install sigs.k8s.io/kind@v0.27.0
 
 e2etest: tools copy clean
 	./run.sh main
diff --git a/e2e/exec_into_env.sh b/e2e/exec_into_env.sh
index 59acbeeb4..a46efecbd 100755
--- a/e2e/exec_into_env.sh
+++ b/e2e/exec_into_env.sh
@@ -2,8 +2,8 @@
 
 export cluster_name="postgres-operator-e2e-tests"
 export kubeconfig_path="/tmp/kind-config-${cluster_name}"
-export operator_image="registry.opensource.zalan.do/acid/postgres-operator:latest"
-export e2e_test_runner_image="registry.opensource.zalan.do/acid/postgres-operator-e2e-tests-runner:0.4"
+export operator_image="ghcr.io/zalando/postgres-operator:latest"
+export e2e_test_runner_image="ghcr.io/zalando/postgres-operator-e2e-tests-runner:latest"
 
 docker run -it --entrypoint /bin/bash --network=host -e "TERM=xterm-256color" \
     --mount type=bind,source="$(readlink -f ${kubeconfig_path})",target=/root/.kube/config \
diff --git a/e2e/requirements.txt b/e2e/requirements.txt
index d904585be..30b656552 100644
--- a/e2e/requirements.txt
+++ b/e2e/requirements.txt
@@ -1,3 +1,3 @@
-kubernetes==29.2.0
+kubernetes==31.0.0
 timeout_decorator==0.5.0
-pyyaml==6.0.1
+pyyaml==6.0.3
diff --git a/e2e/run.sh b/e2e/run.sh
index d289cb3f4..b0f13f92e 100755
--- a/e2e/run.sh
+++ b/e2e/run.sh
@@ -9,7 +9,7 @@ IFS=$'\n\t'
 readonly cluster_name="postgres-operator-e2e-tests"
 readonly kubeconfig_path="/tmp/kind-config-${cluster_name}"
 readonly spilo_image="registry.opensource.zalan.do/acid/spilo-17-e2e:0.3"
-readonly e2e_test_runner_image="registry.opensource.zalan.do/acid/postgres-operator-e2e-tests-runner:0.4"
+readonly e2e_test_runner_image="ghcr.io/zalando/postgres-operator-e2e-tests-runner:latest"
 
 export GOPATH=${GOPATH-~/go}
 export PATH=${GOPATH}/bin:$PATH
@@ -19,11 +19,11 @@ echo "Kubeconfig path: ${kubeconfig_path}"
 
 function pull_images(){
   operator_tag=$(git describe --tags --always --dirty)
-  if [[ -z $(docker images -q registry.opensource.zalan.do/acid/postgres-operator:${operator_tag}) ]]
+  if [[ -z $(docker images -q ghcr.io/zalando/postgres-operator:${operator_tag}) ]]
   then
-    docker pull registry.opensource.zalan.do/acid/postgres-operator:latest
+    docker pull ghcr.io/zalando/postgres-operator:latest
   fi
-  operator_image=$(docker images --filter=reference="registry.opensource.zalan.do/acid/postgres-operator" --format "{{.Repository}}:{{.Tag}}" | head -1)
+  operator_image=$(docker images --filter=reference="ghcr.io/zalando/postgres-operator" --format "{{.Repository}}:{{.Tag}}" | head -1)
 }
 
 function start_kind(){
diff --git a/manifests/postgresql.crd.yaml b/manifests/postgresql.crd.yaml
index 39d751cef..7a1b21a4d 100644
--- a/manifests/postgresql.crd.yaml
+++ b/manifests/postgresql.crd.yaml
@@ -276,7 +276,6 @@ spec:
                                     items:
                                       type: string
                         weight:
-                          format: int32
                           type: integer
                   requiredDuringSchedulingIgnoredDuringExecution:
                     type: object
diff --git a/pkg/apis/acid.zalan.do/v1/crds.go b/pkg/apis/acid.zalan.do/v1/crds.go
index 3f6bf25d9..b89cb1448 100644
--- a/pkg/apis/acid.zalan.do/v1/crds.go
+++ b/pkg/apis/acid.zalan.do/v1/crds.go
@@ -436,8 +436,7 @@ var PostgresCRDResourceValidation = apiextv1.CustomResourceValidation{
 												},
 											},
 											"weight": {
-												Type:   "integer",
-												Format: "int32",
+												Type: "integer",
 											},
 										},
 									},
@@ -768,9 +767,9 @@ var PostgresCRDResourceValidation = apiextv1.CustomResourceValidation{
 							},
 						},
 						OneOf: []apiextv1.JSONSchemaProps{
-							apiextv1.JSONSchemaProps{Required: []string{"s3_wal_path"}},
-							apiextv1.JSONSchemaProps{Required: []string{"gs_wal_path"}},
-							apiextv1.JSONSchemaProps{Required: []string{"standby_host"}},
+							{Required: []string{"s3_wal_path"}},
+							{Required: []string{"gs_wal_path"}},
+							{Required: []string{"standby_host"}},
 						},
 					},
 					"streams": {
diff --git a/pkg/apis/acid.zalan.do/v1/util_test.go b/pkg/apis/acid.zalan.do/v1/util_test.go
index 5e4913ffe..9f3fe9bde 100644
--- a/pkg/apis/acid.zalan.do/v1/util_test.go
+++ b/pkg/apis/acid.zalan.do/v1/util_test.go
@@ -787,8 +787,6 @@ func TestPostgresListMeta(t *testing.T) {
 			if a := tt.out.GetListMeta(); reflect.DeepEqual(a, tt.out.ListMeta) {
 				t.Errorf("GetObjectMeta expected: %v, got: %v", tt.out.ListMeta, a)
 			}
-
-			return
 		})
 	}
 }
diff --git a/ui/Dockerfile b/ui/Dockerfile
index 8ed70c2c0..63170a24b 100644
--- a/ui/Dockerfile
+++ b/ui/Dockerfile
@@ -17,7 +17,7 @@ WORKDIR /app
 
 RUN apt-get -qq -y update \
  # https://www.psycopg.org/docs/install.html#psycopg-vs-psycopg-binary
- && apt-get -qq -y install --no-install-recommends g++ libpq-dev python3-dev python3-distutils \
+ && apt-get -qq -y install --no-install-recommends g++ libpq-dev python3-dev \
  && apt-get -qq -y clean \
  && rm -rf /var/lib/apt/lists/*