diff --git a/pkg/apis/common/v1/types.go b/pkg/apis/common/v1/types.go
index 0b894b26..6cb97c75 100644
--- a/pkg/apis/common/v1/types.go
+++ b/pkg/apis/common/v1/types.go
@@ -69,8 +69,17 @@ type ReplicaStatus struct {
 type ReplicaSpec struct {
 	// Replicas is the desired number of replicas of the given template.
 	// If unspecified, defaults to 1.
+	// +optional
 	Replicas *int32 `json:"replicas,omitempty"`
 
+	// minReplicas is the lower limit for the number of replicas to which the training job
+	// can scale down.  It defaults to nil.
+	// +optional
+	MinReplicas *int32 `json:"minReplicas,omitempty"`
+	// upper limit for the number of pods that can be set by the autoscaler; cannot be smaller than MinReplicas, defaults to nil.
+	// +optional
+	MaxReplicas *int32 `json:"maxReplicas,omitempty"`
+
 	// Template is the object that describes the pod that
 	// will be created for this replica. RestartPolicy in PodTemplateSpec
 	// will be overide by RestartPolicy in ReplicaSpec
diff --git a/pkg/apis/common/v1/zz_generated.deepcopy.go b/pkg/apis/common/v1/zz_generated.deepcopy.go
index 3d76bf20..4452b2f0 100644
--- a/pkg/apis/common/v1/zz_generated.deepcopy.go
+++ b/pkg/apis/common/v1/zz_generated.deepcopy.go
@@ -99,6 +99,16 @@ func (in *ReplicaSpec) DeepCopyInto(out *ReplicaSpec) {
 		*out = new(int32)
 		**out = **in
 	}
+	if in.MinReplicas != nil {
+		in, out := &in.MinReplicas, &out.MinReplicas
+		*out = new(int32)
+		**out = **in
+	}
+	if in.MaxReplicas != nil {
+		in, out := &in.MaxReplicas, &out.MaxReplicas
+		*out = new(int32)
+		**out = **in
+	}
 	in.Template.DeepCopyInto(&out.Template)
 	return
 }