diff --git a/ansible/group_vars/all/oas.yml b/ansible/group_vars/all/oas.yml
index 2b3299f5a06f5ee3dbcdb70074dede020fbf5ff9..4dc1f5763e96a03a4434af27cf11421f82d9d646 100644
--- a/ansible/group_vars/all/oas.yml
+++ b/ansible/group_vars/all/oas.yml
@@ -63,10 +63,10 @@ rke:
   # `ansible/group_vars/all/settings.yml.example`
   #
   # https://github.com/rancher/rke/releases
-  version: '1.0.6'
+  version: '1.0.0'
   # Also possible:
   # checksum: 'sha256:https://github.com/rancher/rke/releases/download/v1.0.0/sha256sum.txt'
-  checksum: 'sha256:d6009c1f6381f1b653fcab2a6e5d5522f31e3997c0cbfbb856fe181300b9c474'
+  checksum: 'sha256:c77731f9000e7e18feb90a872e458c7b444a975662ef42aa6fbda0d8926118bc'
 
 cert_manager:
   # cert-manager requires custom resource definitions applied before installing