JsonUtility not found / working

Trying to import a json file and have as far been unable to stop JsonUtility from being red and there for being not found in the current context... any help would be appreciated!

 using UnityEngine;
 using System;
 public class levelData : MonoBehaviour {
 
     level level1 = new level();
 
     // Use this for initialization
     void Start () {
 //        asset = Resources.Load<TextAsset>("JsonTest");
     }
 
     public level load(){
         return JsonUtility.FromJson<level>("something");
     }
 }
 
 [System.Serializable]
 public class level{
     public int levelNum;
 }