diff --git a/cluster/apps/system-upgrade/system-upgrade-controller/agent-plan.yaml b/cluster/apps/system-upgrade/system-upgrade-controller/agent-plan.yaml
index 30cd46a0..36547df8 100644
--- a/cluster/apps/system-upgrade/system-upgrade-controller/agent-plan.yaml
+++ b/cluster/apps/system-upgrade/system-upgrade-controller/agent-plan.yaml
@@ -9,7 +9,7 @@ metadata:
 spec:
   serviceAccountName: system-upgrade
   concurrency: 1
-  channel: https://update.k3s.io/v1-release/channels/v1.20
+  channel: https://update.k3s.io/v1-release/channels/v1.21
   nodeSelector:
     matchExpressions:
       - key: node-role.kubernetes.io/master
diff --git a/cluster/apps/system-upgrade/system-upgrade-controller/server-plan.yaml b/cluster/apps/system-upgrade/system-upgrade-controller/server-plan.yaml
index 640f4656..02dfe0d6 100644
--- a/cluster/apps/system-upgrade/system-upgrade-controller/server-plan.yaml
+++ b/cluster/apps/system-upgrade/system-upgrade-controller/server-plan.yaml
@@ -7,7 +7,7 @@ metadata:
 spec:
   serviceAccountName: system-upgrade
   concurrency: 1
-  channel: https://update.k3s.io/v1-release/channels/v1.20
+  channel: https://update.k3s.io/v1-release/channels/v1.21
   cordon: true
   nodeSelector:
     matchExpressions: