diff --git a/.github/kind-cluster-1.20.yaml b/.github/kind-cluster-1.20.yaml
new file mode 100644
index 0000000..fb9dd28
--- /dev/null
+++ b/.github/kind-cluster-1.20.yaml
@@ -0,0 +1,13 @@
+kind: Cluster
+apiVersion: kind.x-k8s.io/v1alpha4
+nodes:
+- role: control-plane
+  image: "kindest/node:v1.20.0"
+- role: control-plane
+  image: "kindest/node:v1.20.0"
+- role: control-plane
+  image: "kindest/node:v1.20.0"
+- role: worker
+  image: "kindest/node:v1.20.0"
+- role: worker
+  image: "kindest/node:v1.20.0"
diff --git a/.github/workflows/on-pr.yaml b/.github/workflows/on-pr.yaml
index 92fd41c..cf3c261 100644
--- a/.github/workflows/on-pr.yaml
+++ b/.github/workflows/on-pr.yaml
@@ -78,8 +78,8 @@ jobs:
     strategy:
       matrix:
         kubernetes:
-          - 1.17
-          - 1.19
+          - "1.18"
+          - "1.20"
     steps:
       - uses: actions/checkout@v2
       - name: Find go version
diff --git a/.github/workflows/periodics-daily.yaml b/.github/workflows/periodics-daily.yaml
index f94a6e3..4c6c3e7 100644
--- a/.github/workflows/periodics-daily.yaml
+++ b/.github/workflows/periodics-daily.yaml
@@ -59,9 +59,9 @@ jobs:
     strategy:
       matrix:
         kubernetes:
-          - 1.17
           - 1.18
           - 1.19
+          - 1.20
     steps:
       - uses: actions/checkout@v2
       - name: Find go version
diff --git a/README.md b/README.md
index 26d6a52..e63fdc3 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ server:
 
 | kured  | kubectl | k8s.io/client-go | k8s.io/apimachinery | expected kubernetes compatibility |
 |--------|---------|------------------|---------------------|-----------------------------------|
-| master | 1.19.4  | v0.19.4          | v0.19.4             | 1.17.x, 1.18.x, 1.19.x            |
+| master | 1.19.4  | v0.19.4          | v0.19.4             | 1.18.x, 1.19.x, 1.20.x            |
 | 1.5.1  | 1.18.8  | v0.18.8          | v0.18.8             | 1.17.x, 1.18.x, 1.19.x            |
 | 1.4.4  | 1.17.7  | v0.17.0          | v0.17.0             | 1.16.x, 1.17.x, 1.18.x            |
 | 1.3.0  | 1.15.10 | v12.0.0          | release-1.15        | 1.15.x, 1.16.x, 1.17.x            |