diff --git a/.github/workflows/build-mysql-container.yaml b/.github/workflows/build-mysql-container.yaml
index 1fc8e49f..abe1b61f 100644
--- a/.github/workflows/build-mysql-container.yaml
+++ b/.github/workflows/build-mysql-container.yaml
@@ -45,7 +45,7 @@ jobs:
     strategy:
       matrix:
         mysql-version: ${{ fromJson(needs.filter.outputs.mysql-versions) }}
-        k8s-version: [ "1.30.0" ]
+        k8s-version: [ "1.29.4" ]
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
diff --git a/.github/workflows/ci-e2e.yaml b/.github/workflows/ci-e2e.yaml
index 04003891..546005c3 100644
--- a/.github/workflows/ci-e2e.yaml
+++ b/.github/workflows/ci-e2e.yaml
@@ -45,7 +45,7 @@ jobs:
     strategy:
       matrix:
         mysql-version: ["8.0.37"]
-        k8s-version: ["1.28.9", "1.29.4", "1.30.0"]
+        k8s-version: ["1.27.13", "1.28.9", "1.29.4"]
     runs-on:
       group: moco
     steps:
@@ -68,7 +68,7 @@ jobs:
     strategy:
       matrix:
         mysql-version: ["8.0.35", "8.0.36", "8.0.37"]
-        k8s-version: ["1.30.0"]
+        k8s-version: ["1.29.4"]
     runs-on:
       group: moco
     steps:
diff --git a/.github/workflows/helm.yaml b/.github/workflows/helm.yaml
index 6a587ada..14ffc76d 100644
--- a/.github/workflows/helm.yaml
+++ b/.github/workflows/helm.yaml
@@ -38,8 +38,8 @@ jobs:
         if: steps.list-changed.outputs.changed == 'true'
         with:
           version: v0.23.0
-          node_image: kindest/node:v1.30.0
-          kubectl_version: v1.30.0
+          node_image: kindest/node:v1.29.4
+          kubectl_version: v1.29.4
 
       - name: Apply cert-manager
         run: |
diff --git a/.github/workflows/weekly.yaml b/.github/workflows/weekly.yaml
index 23eec674..7c7219d5 100644
--- a/.github/workflows/weekly.yaml
+++ b/.github/workflows/weekly.yaml
@@ -30,7 +30,7 @@ jobs:
     strategy:
       matrix:
         mysql-version: ["8.0.37"]
-        k8s-version: ["1.28.9", "1.29.4", "1.30.0"]
+        k8s-version: ["1.27.13", "1.28.9", "1.29.4"]
     runs-on:
       group: moco
     steps:
@@ -45,7 +45,7 @@ jobs:
     strategy:
       matrix:
         mysql-version: ["8.0.18", "8.0.25", "8.0.26", "8.0.27", "8.0.28", "8.0.30", "8.0.31", "8.0.32", "8.0.33", "8.0.34", "8.0.35", "8.0.36", "8.0.37"]
-        k8s-version: ["1.30.0"]
+        k8s-version: ["1.29.4"]
     runs-on:
       group: moco
     steps:
diff --git a/README.md b/README.md
index 0b2e49b3..ada50674 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ Blog article: [Introducing MOCO, a modern MySQL operator on Kubernetes](https://
 ## Supported software
 
 - MySQL: 8.0.18, 8.0.25, 8.0.26, 8.0.27, 8.0.28, 8.0.30, 8.0.31, 8.0.32, 8.0.33, 8.0.34, 8.0.35, 8.0.36, 8.0.37
-- Kubernetes: 1.28, 1.29, 1.30
+- Kubernetes: 1.27, 1.28, 1.29
 
 MOCO supports (tests) the LTS releases of MySQL 8.
 Innovation releases would probably work. But they are not tested in our CI.
diff --git a/e2e/Makefile b/e2e/Makefile
index 6d5ead53..99ac5747 100644
--- a/e2e/Makefile
+++ b/e2e/Makefile
@@ -1,5 +1,5 @@
 KIND_VERSION = 0.23.0
-KUBERNETES_VERSION = 1.30.0
+KUBERNETES_VERSION = 1.29.4
 CERT_MANAGER_VERSION = 1.14.5
 MYSQL_VERSION = 8.0.37