diff --git a/channels/alpha b/channels/alpha
index 3c6a26855f..62fb774d73 100644
--- a/channels/alpha
+++ b/channels/alpha
@@ -12,10 +12,10 @@ spec:
       kubernetesVersion: ">=1.6.0 <1.7.0"
     - name: kope.io/k8s-1.7-debian-jessie-amd64-hvm-ebs-2017-12-01
       providerID: aws
-      kubernetesVersion: ">=1.7.0"
+      kubernetesVersion: ">=1.7.0 <1.8.0"
     - name: kope.io/k8s-1.8-debian-jessie-amd64-hvm-ebs-2017-12-01
       providerID: aws
-      kubernetesVersion: ">=1.8.0"
+      kubernetesVersion: ">=1.8.0 <1.9.0"
     # Moving to stretch in 1.9 (if goes well)
     - name: kope.io/k8s-1.8-debian-stretch-amd64-hvm-ebs-2017-12-01
       providerID: aws