diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 1831f8e65..0799b3d8b 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -50,6 +50,7 @@ jobs:
         kubernetes:
           - 1.21.14
           - 1.22.17
+          - 1.23.17
           - 1.24.16
           - 1.25.12
           - 1.26.7
diff --git a/docs/README.md b/docs/README.md
index cf8e3cb47..e19233548 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -10,7 +10,7 @@ Redis Operator creates/configures/manages redis-failovers atop Kubernetes.
 Kubernetes version: 1.21 or higher
 Redis version: 7 or higher
 
-Redis operator is being tested against kubernetes 1.25 1.26 1.27 and redis 7
+Redis operator is being tested against kubernetes 1.21, 1.22, 1.23, 1.24, 1.25 1.26 1.27 and redis 7
 All dependencies have been vendored, so there's no need to any additional download.
 
 ## Operator deployment on Kubernetes