diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/AnimationImporterUtil.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/AnimationImporterUtil.cs
index 8c38c23a3..8a0cd3d23 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/AnimationImporterUtil.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/AnimationIO/AnimationImporterUtil.cs
@@ -1,7 +1,9 @@
 using System;
 using System.Linq;
 using System.Collections.Generic;
+using System.Threading.Tasks;
 using UnityEngine;
+using VRMShaders;
 
 namespace UniGLTF
 {
@@ -185,7 +187,7 @@ namespace UniGLTF
             return string.Join("/", path);
         }
 
-        public static AnimationClip ConvertAnimationClip(GltfData data, glTFAnimation animation, IAxisInverter inverter, glTFNode root = null)
+        public static async Task<AnimationClip> ConvertAnimationClip(GltfData data, glTFAnimation animation, IAxisInverter inverter, IAwaitCaller awaitCaller, glTFNode root = null)
         {
             var clip = new AnimationClip();
             clip.ClearCurves();
@@ -309,6 +311,7 @@ namespace UniGLTF
                         Debug.LogWarningFormat("unknown path: {0}", channel.target.path);
                         break;
                 }
+                await awaitCaller.NextFrameIfTimedOut();
             }
             return clip;
         }
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs
index 23aba44ba..9061838fd 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/ImporterContext.cs
@@ -136,10 +136,7 @@ namespace UniGLTF
                 foreach (var (key, gltfAnimation) in Enumerable.Zip(AnimationImporterUtil.EnumerateSubAssetKeys(GLTF), GLTF.animations, (x, y) => (x, y)))
                 {
                     await AnimationClipFactory.LoadAnimationClipAsync(key, () =>
-                    {
-                        var clip = AnimationImporterUtil.ConvertAnimationClip(Data, gltfAnimation, InvertAxis.Create());
-                        return Task.FromResult(clip);
-                    });
+                        AnimationImporterUtil.ConvertAnimationClip(Data, gltfAnimation, InvertAxis.Create(), awaitCaller));
                 }
 
                 await awaitCaller.NextFrame();