diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 28b9acc582..84b54ef27b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -68,8 +68,8 @@ for source changes.
 Prerequisites:
 
 * go >= 1.20
-* kubectl >= 1.20
-* kustomize >= 4.4
+* kubectl >= 1.24
+* kustomize >= 5.0
 * coreutils (on Mac OS)
 
 Install the [controller-runtime/envtest](https://github.com/kubernetes-sigs/controller-runtime/tree/master/tools/setup-envtest) binaries with:
diff --git a/cmd/flux/check.go b/cmd/flux/check.go
index ab029f2ff2..e6fa29a55e 100644
--- a/cmd/flux/check.go
+++ b/cmd/flux/check.go
@@ -57,7 +57,7 @@ type checkFlags struct {
 }
 
 var kubernetesConstraints = []string{
-	">=1.20.6-0",
+	">=1.24.0-0",
 }
 
 var checkArgs checkFlags
diff --git a/cmd/flux/testdata/check/check_pre.golden b/cmd/flux/testdata/check/check_pre.golden
index ebb6294dd3..4a263acdcf 100644
--- a/cmd/flux/testdata/check/check_pre.golden
+++ b/cmd/flux/testdata/check/check_pre.golden
@@ -1,3 +1,3 @@
 ► checking prerequisites
-✔ Kubernetes {{ .serverVersion }} >=1.20.6-0
+✔ Kubernetes {{ .serverVersion }} >=1.24.0-0
 ✔ prerequisites checks passed