diff --git a/.github/workflows/ci-schedule-compatibility.yaml b/.github/workflows/ci-schedule-compatibility.yaml
index d9f19fdd8a3d..737ff0731dbf 100644
--- a/.github/workflows/ci-schedule-compatibility.yaml
+++ b/.github/workflows/ci-schedule-compatibility.yaml
@@ -12,19 +12,19 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        kubeapiserver-version: [ v1.21.10, v1.22.7, v1.23.4, v1.24.2, v1.25.0, v1.26.0 ]
-        karmada-version: [ release-1.3, release-1.4, release-1.5 ]
+        kubeapiserver-version: [ v1.21.10, v1.22.7, v1.23.4, v1.24.2, v1.25.0, v1.26.0, v1.27.3 ]
+        karmada-version: [ release-1.4, release-1.5, release-1.6 ]
 
         include:
-        - karmada-version: release-1.3
-          go-version: 1.18.3
-
         - karmada-version: release-1.4
           go-version: 1.19.5
 
         - karmada-version: release-1.5
           go-version: 1.19.5
 
+        - karmada-version: release-1.6
+          go-version: 1.20.5
+
     steps:
       - name: checkout code
         uses: actions/checkout@v3
diff --git a/.github/workflows/ci-schedule.yml b/.github/workflows/ci-schedule.yml
index dd820d0a2f18..44b9a0555bd8 100644
--- a/.github/workflows/ci-schedule.yml
+++ b/.github/workflows/ci-schedule.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-22.04
     strategy:
       matrix:
-        k8s: [ v1.21.10, v1.22.7, v1.23.4, v1.24.2, v1.25.0, v1.26.0 ]
+        k8s: [ v1.21.10, v1.22.7, v1.23.4, v1.24.2, v1.25.0, v1.26.0, v1.27.3 ]
     steps:
       - name: checkout code
         uses: actions/checkout@v3
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 79ed2141fda0..45a4982fbf06 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -112,7 +112,7 @@ jobs:
         # Here support the latest three minor releases of Kubernetes, this can be considered to be roughly
         # the same as the End of Life of the Kubernetes release: https://kubernetes.io/releases/
         # Please remember to update the CI Schedule Workflow when we add a new version.
-        k8s: [ v1.24.2, v1.25.0, v1.26.0 ]
+        k8s: [ v1.25.0, v1.26.0, v1.27.3 ]
     steps:
       - name: checkout code
         uses: actions/checkout@v3
diff --git a/README.md b/README.md
index 2884bb254550..9817c2757f47 100644
--- a/README.md
+++ b/README.md
@@ -186,6 +186,7 @@ nginx   2/2     2            2           20s
 | Karmada v1.3           | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               |
 | Karmada v1.4           | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               |
 | Karmada v1.5           | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               |
+| Karmada v1.6           | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               |
 | Karmada HEAD (master)  | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               | ✓               |
 
 Key: