diff --git a/api/spec.go b/api/spec.go
index 116de4b..8b1b371 100644
--- a/api/spec.go
+++ b/api/spec.go
@@ -20,7 +20,7 @@ type ScenarioSpec struct {
 
 // BenchmarkSpec benchmark specs top level structure
 type BenchmarkSpec struct {
-	Scenarios  []*ScenarioSpec `json:"scenarios" yaml:"scenarios" validate:"required,dive"`
+	Scenarios  []*ScenarioSpec `json:"scenarios" yaml:"scenarios" validate:"required,min=1,dive"`
 	Executions int             `validate:"required,gte=1"`
 	Alternate  bool
 }