diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/EngineCallbackRunner.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/EngineCallbackRunner.cs
index 995a7d4..a61518c 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/EngineCallbackRunner.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/EngineCallbackRunner.cs
@@ -24,7 +24,7 @@ namespace Cysharp.Threading.Tasks.Internal
                 case EngineCallbackTiming.WillRenderCanvases:
                     WillRenderCanvases();
                     break;
-#if UNITY_2021_3_OR_NEWER
+#if UNITY_2020_3_OR_NEWER
                 case EngineCallbackTiming.PreWillRenderCanvases:
                     PreWillRenderCanvases();
                     break;
@@ -40,7 +40,7 @@ namespace Cysharp.Threading.Tasks.Internal
 
         void OnBeforeRender() => RunCore();
         void WillRenderCanvases() => RunCore();
-#if UNITY_2021_3_OR_NEWER
+#if UNITY_2020_3_OR_NEWER
         void PreWillRenderCanvases() => RunCore();
 #endif
     }
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/PlayerLoopHelper.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/PlayerLoopHelper.cs
index ea42d33..88044de 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/PlayerLoopHelper.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/PlayerLoopHelper.cs
@@ -103,7 +103,7 @@ namespace Cysharp.Threading.Tasks
         OnBeforeRender = 0,
 
         WillRenderCanvases = 1,
-#if UNITY_2021_3_OR_NEWER
+#if UNITY_2020_3_OR_NEWER
         PreWillRenderCanvases = 2,
 #endif
     }
@@ -187,7 +187,7 @@ namespace Cysharp.Threading.Tasks
         All =
             OnBeforeRender |
             WillRenderCanvases
-#if UNITY_2021_3_OR_NEWER
+#if UNITY_2020_3_OR_NEWER
             | PreWillRenderCanvases
 #endif
         ,
@@ -195,7 +195,7 @@ namespace Cysharp.Threading.Tasks
         OnBeforeRender = 1,
 
         WillRenderCanvases = 2,
-#if UNITY_2021_3_OR_NEWER
+#if UNITY_2020_3_OR_NEWER
         PreWillRenderCanvases = 4,
 #endif
     }
@@ -448,7 +448,7 @@ namespace Cysharp.Threading.Tasks
             runners = new PlayerLoopRunner[14];
 #endif
 
-#if UNITY_2021_3_OR_NEWER
+#if UNITY_2020_3_OR_NEWER
             callbackRunners = new EngineCallbackRunner[3];
 #else
             callbackRunners = new EngineCallbackRunner[2];
@@ -549,7 +549,7 @@ namespace Cysharp.Threading.Tasks
                 Canvas.willRenderCanvases += willRenderCanvasesRunner.Run;
             }
 
-#if UNITY_2021_3_OR_NEWER
+#if UNITY_2020_3_OR_NEWER
             if (GetInjectCallback(injectCallbackTimings, InjectEngineCallbackTimings.PreWillRenderCanvases,
                 2, EngineCallbackTiming.PreWillRenderCanvases, out var preWillRenderCanvasesRunner))
             {
diff --git a/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Delay.cs b/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Delay.cs
index 2005b2b..487efc5 100644
--- a/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Delay.cs
+++ b/src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Delay.cs
@@ -205,7 +205,7 @@ namespace Cysharp.Threading.Tasks
             return new UniTask(YieldPromise.Create(EngineCallbackTiming.WillRenderCanvases, cancellationToken, cancelImmediately, out var token), token);
         }
 
-#if UNITY_2021_3_OR_NEWER
+#if UNITY_2020_3_OR_NEWER
         public static UniTask WaitForPreWillRenderCanvases(CancellationToken cancellationToken = default(CancellationToken), bool cancelImmediately = false)
         {
             return new UniTask(YieldPromise.Create(EngineCallbackTiming.PreWillRenderCanvases, cancellationToken, cancelImmediately, out var token), token);