diff --git a/task.go b/task.go
index 71c7644f..ce4d2d1d 100644
--- a/task.go
+++ b/task.go
@@ -143,6 +143,21 @@ func (e *Executor) Setup() error {
 		return fmt.Errorf(`task: output option "%s" not recognized`, e.Taskfile.Output)
 	}
 
+	if !version.IsV21(v) {
+		err := fmt.Errorf(`task: Taskfile option "ignore_error" is only available starting on Taskfile version v2.1`)
+
+		for _, task := range e.Taskfile.Tasks {
+			if task.IgnoreError {
+				return err
+			}
+			for _, cmd := range task.Cmds {
+				if cmd.IgnoreError {
+					return err
+				}
+			}
+		}
+	}
+
 	e.taskCallCount = make(map[string]*int32, len(e.Taskfile.Tasks))
 	for k := range e.Taskfile.Tasks {
 		e.taskCallCount[k] = new(int32)