diff --git a/Assets/VRM10.Samples/Runtime/AIUEO.cs b/Assets/VRM10.Samples/Runtime/AIUEO.cs
index 4f81259e7..58fe8e65b 100644
--- a/Assets/VRM10.Samples/Runtime/AIUEO.cs
+++ b/Assets/VRM10.Samples/Runtime/AIUEO.cs
@@ -30,17 +30,17 @@ namespace UniVRM10.Samples
         {
             for (var value = 0.0f; value <= 1.0f; value += velocity)
             {
-                VRM.Expression.Accumulator.SetPresetValue(preset, value);
+                VRM.Expression.SetWeight(ExpressionKey.CreateFromPreset(preset), value);
                 yield return null;
             }
-            VRM.Expression.Accumulator.SetPresetValue(preset, 1.0f);
+            VRM.Expression.SetWeight(ExpressionKey.CreateFromPreset(preset), 1.0f);
             yield return new WaitForSeconds(wait);
             for (var value = 1.0f; value >= 0; value -= velocity)
             {
-                VRM.Expression.Accumulator.SetPresetValue(preset, value);
+                VRM.Expression.SetWeight(ExpressionKey.CreateFromPreset(preset), value);
                 yield return null;
             }
-            VRM.Expression.Accumulator.SetPresetValue(preset, 0);
+            VRM.Expression.SetWeight(ExpressionKey.CreateFromPreset(preset), 0);
             yield return new WaitForSeconds(wait * 2);
         }
 
diff --git a/Assets/VRM10.Samples/Runtime/Blinker.cs b/Assets/VRM10.Samples/Runtime/Blinker.cs
index 0ff3b7041..815312342 100644
--- a/Assets/VRM10.Samples/Runtime/Blinker.cs
+++ b/Assets/VRM10.Samples/Runtime/Blinker.cs
@@ -72,10 +72,10 @@ namespace UniVRM10.Samples
                         break;
                     }
 
-                    m_controller.Expression.Accumulator.SetPresetValue(VrmLib.ExpressionPreset.Blink, value);
+                    m_controller.Expression.SetWeight(ExpressionKey.CreateFromPreset(VrmLib.ExpressionPreset.Blink), value);
                     yield return null;
                 }
-                m_controller.Expression.Accumulator.SetPresetValue(VrmLib.ExpressionPreset.Blink, 1.0f);
+                m_controller.Expression.SetWeight(ExpressionKey.CreateFromPreset(VrmLib.ExpressionPreset.Blink), 1.0f);
 
                 // wait...
                 yield return new WaitForSeconds(ClosingTime);
@@ -91,10 +91,10 @@ namespace UniVRM10.Samples
                         break;
                     }
 
-                    m_controller.Expression.Accumulator.SetPresetValue(VrmLib.ExpressionPreset.Blink, value);
+                    m_controller.Expression.SetWeight(ExpressionKey.CreateFromPreset(VrmLib.ExpressionPreset.Blink), value);
                     yield return null;
                 }
-                m_controller.Expression.Accumulator.SetPresetValue(VrmLib.ExpressionPreset.Blink, 0);
+                m_controller.Expression.SetWeight(ExpressionKey.CreateFromPreset(VrmLib.ExpressionPreset.Blink), 0);
             }
         }