diff --git a/apis/management.cattle.io/v3/k3s_types.go b/apis/management.cattle.io/v3/k3s_types.go
index 7923a1d7..a0ce858e 100644
--- a/apis/management.cattle.io/v3/k3s_types.go
+++ b/apis/management.cattle.io/v3/k3s_types.go
@@ -10,9 +10,9 @@ type K3sConfig struct {
 //K3sUpgradeStrategy provides configuration to the downstream system-upgrade-controller
 type K3sUpgradeStrategy struct {
 	// How many controlplane nodes should be upgrade at time, defaults to 1
-	ServerConcurrency int `yaml:"server_concurrency" json:"serverConcurrency,omitempty"`
+	ServerConcurrency int `yaml:"server_concurrency" json:"serverConcurrency,omitempty" norman:"min=1"`
 	// How many workers should be upgraded at a time
-	WorkerConcurrency int `yaml:"worker_concurrency" json:"workerConcurrency,omitempty"`
+	WorkerConcurrency int `yaml:"worker_concurrency" json:"workerConcurrency,omitempty" norman:"min=1"`
 	// Whether controlplane nodes should be drained
 	DrainServerNodes bool `yaml:"drain_server_nodes" json:"drainServerNodes,omitempty"`
 	// Whether worker nodes should be drained