diff --git a/README.md b/README.md
index 996cff5fc403e846306fbecac7c34685ccc261b3..77af9c39de364676c02d152c92bac560a2a79266 100644
--- a/README.md
+++ b/README.md
@@ -106,7 +106,7 @@ Supported Components
     -   [etcd](https://github.com/coreos/etcd) v3.2.18
     -   [docker](https://www.docker.com/) v17.03 (see note)
     -   [rkt](https://github.com/rkt/rkt) v1.21.0 (see Note 2)
-    -   [cri-o](http://cri-o.io/) v1.11.5 (see [CRI-O Note](docs/cri-o.md))
+    -   [cri-o](http://cri-o.io/) v1.11.5 (experimental: see [CRI-O Note](docs/cri-o.md). Only on centos based OS)
 -   Network Plugin
     -   [calico](https://github.com/projectcalico/calico) v3.1.3
     -   [canal](https://github.com/projectcalico/canal) (given calico/flannel versions)