diff --git a/Runtime/Procedure/ProcedureBase.cs b/Runtime/Procedure/ProcedureBase.cs
index 43ef003..8d3609e 100644
--- a/Runtime/Procedure/ProcedureBase.cs
+++ b/Runtime/Procedure/ProcedureBase.cs
@@ -66,7 +66,7 @@ namespace AlicizaX
 
         protected internal void SwitchProcedure<T>() where T : ProcedureBase
         {
-            AppServices.Require<IProcedureService>().SwitchProcedure<T>();
+            ProcedureService.SwitchProcedure<T>();
         }
     }
 }