diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 21a47596fbc5104d12311b1337fdcad4cbb97614..e4b5c79e2547824f5577a268b5abe3a760c08ce4 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -52,7 +52,6 @@ jobs:
     strategy:
       matrix:
         kind-image:
-          - 'kindest/node:v1.20.7'
           - 'kindest/node:v1.21.1'
           - 'kindest/node:v1.22.0'
     steps:
diff --git a/README.md b/README.md
index 328b92951380525d9f69488999130429ebd8f6f0..2eb2ccfba0aa27aed58638f20119b6369a46e54b 100644
--- a/README.md
+++ b/README.md
@@ -112,7 +112,7 @@ The following versions are supported and work as we test against these versions
 | [`release-0.6`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.6) | ✗               | ✔               | ✗               | ✗               | ✗               |
 | [`release-0.7`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.7) | ✗               | ✔               | ✔               | ✗               | ✗               |
 | [`release-0.8`](https://github.com/prometheus-operator/kube-prometheus/tree/release-0.8) | ✗               | ✗               | ✔               | ✔               | ✗               |
-| [`HEAD`](https://github.com/prometheus-operator/kube-prometheus/tree/main)               | ✗               | ✗               | ✔               | ✔               | ✔               |
+| [`HEAD`](https://github.com/prometheus-operator/kube-prometheus/tree/main)               | ✗               | ✗               | ✗               | ✔               | ✔               |
 
 ## Quickstart