diff --git a/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericExpressionCallFactory.cs b/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericExpressionCallFactory.cs
index 4acafd1e5..fa8fd8b1f 100644
--- a/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericExpressionCallFactory.cs
+++ b/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericExpressionCallFactory.cs
@@ -49,13 +49,13 @@ namespace UniJSON
                     var a = String.Join(", ", GetArgs("a", i).ToArray());
 
                     var source = @"
-        public static Delegate Create<S, $0>(MethodInfo m)
+        public static Action<S, $0> Create<S, $0>(MethodInfo m)
         {
             var self = Expression.Parameter(m.DeclaringType, m.Name);
             var args = m.GetParameters().Select(x => Expression.Parameter(x.ParameterType, x.Name)).ToArray();
             var call = Expression.Call(self, m, args);
             return 
-                Expression.Lambda(call, new[] { self }.Concat(args).ToArray()).Compile();
+                (Action<S, $0>)Expression.Lambda(call, new[] { self }.Concat(args).ToArray()).Compile();
         }
 ".Replace("$0", g).Replace("$1", a);
 
@@ -68,7 +68,7 @@ namespace UniJSON
                     var g = String.Join(", ", GetArgs("A", i).ToArray());
 
                     var source = @"
-        public static Delegate CreateWithThis<S, $0>(MethodInfo m, S instance)
+        public static Action<$0> CreateWithThis<S, $0>(MethodInfo m, S instance)
         {
             if (m.IsStatic)
             {
@@ -97,7 +97,7 @@ namespace UniJSON
                 call = Expression.Call(self, m, args);
             }
             return 
-                Expression.Lambda(call, args).Compile();
+                (Action<$0>)Expression.Lambda(call, args).Compile();
         }
 ".Replace("$0", g);
 
diff --git a/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericExpressionCallFactory.g.cs b/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericExpressionCallFactory.g.cs
index 8dae56f0e..5415ced57 100644
--- a/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericExpressionCallFactory.g.cs
+++ b/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericExpressionCallFactory.g.cs
@@ -11,37 +11,37 @@ namespace UniJSON
     {
 
 
-        public static Delegate Create<S, A0>(MethodInfo m)
+        public static Action<S, A0> Create<S, A0>(MethodInfo m)
         {
             var self = Expression.Parameter(m.DeclaringType, m.Name);
             var args = m.GetParameters().Select(x => Expression.Parameter(x.ParameterType, x.Name)).ToArray();
             var call = Expression.Call(self, m, args);
             return 
-                Expression.Lambda(call, new[] { self }.Concat(args).ToArray()).Compile();
+                (Action<S, A0>)Expression.Lambda(call, new[] { self }.Concat(args).ToArray()).Compile();
         }
 
 
-        public static Delegate Create<S, A0, A1>(MethodInfo m)
+        public static Action<S, A0, A1> Create<S, A0, A1>(MethodInfo m)
         {
             var self = Expression.Parameter(m.DeclaringType, m.Name);
             var args = m.GetParameters().Select(x => Expression.Parameter(x.ParameterType, x.Name)).ToArray();
             var call = Expression.Call(self, m, args);
             return 
-                Expression.Lambda(call, new[] { self }.Concat(args).ToArray()).Compile();
+                (Action<S, A0, A1>)Expression.Lambda(call, new[] { self }.Concat(args).ToArray()).Compile();
         }
 
 
-        public static Delegate Create<S, A0, A1, A2>(MethodInfo m)
+        public static Action<S, A0, A1, A2> Create<S, A0, A1, A2>(MethodInfo m)
         {
             var self = Expression.Parameter(m.DeclaringType, m.Name);
             var args = m.GetParameters().Select(x => Expression.Parameter(x.ParameterType, x.Name)).ToArray();
             var call = Expression.Call(self, m, args);
             return 
-                Expression.Lambda(call, new[] { self }.Concat(args).ToArray()).Compile();
+                (Action<S, A0, A1, A2>)Expression.Lambda(call, new[] { self }.Concat(args).ToArray()).Compile();
         }
 
 
-        public static Delegate CreateWithThis<S, A0>(MethodInfo m, S instance)
+        public static Action<A0> CreateWithThis<S, A0>(MethodInfo m, S instance)
         {
             if (m.IsStatic)
             {
@@ -70,11 +70,11 @@ namespace UniJSON
                 call = Expression.Call(self, m, args);
             }
             return 
-                Expression.Lambda(call, args).Compile();
+                (Action<A0>)Expression.Lambda(call, args).Compile();
         }
 
 
-        public static Delegate CreateWithThis<S, A0, A1>(MethodInfo m, S instance)
+        public static Action<A0, A1> CreateWithThis<S, A0, A1>(MethodInfo m, S instance)
         {
             if (m.IsStatic)
             {
@@ -103,11 +103,11 @@ namespace UniJSON
                 call = Expression.Call(self, m, args);
             }
             return 
-                Expression.Lambda(call, args).Compile();
+                (Action<A0, A1>)Expression.Lambda(call, args).Compile();
         }
 
 
-        public static Delegate CreateWithThis<S, A0, A1, A2>(MethodInfo m, S instance)
+        public static Action<A0, A1, A2> CreateWithThis<S, A0, A1, A2>(MethodInfo m, S instance)
         {
             if (m.IsStatic)
             {
@@ -136,11 +136,11 @@ namespace UniJSON
                 call = Expression.Call(self, m, args);
             }
             return 
-                Expression.Lambda(call, args).Compile();
+                (Action<A0, A1, A2>)Expression.Lambda(call, args).Compile();
         }
 
 
-        public static Delegate CreateWithThis<S, A0, A1, A2, A3>(MethodInfo m, S instance)
+        public static Action<A0, A1, A2, A3> CreateWithThis<S, A0, A1, A2, A3>(MethodInfo m, S instance)
         {
             if (m.IsStatic)
             {
@@ -169,7 +169,7 @@ namespace UniJSON
                 call = Expression.Call(self, m, args);
             }
             return 
-                Expression.Lambda(call, args).Compile();
+                (Action<A0, A1, A2, A3>)Expression.Lambda(call, args).Compile();
         }
 
 
diff --git a/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericInvokeCallFactory.cs b/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericInvokeCallFactory.cs
index 497cbbad6..cd97aa66a 100644
--- a/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericInvokeCallFactory.cs
+++ b/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericInvokeCallFactory.cs
@@ -54,7 +54,7 @@ namespace UniJSON
 
 
                     var source = @"
-        public static Delegate Create<S, $0>(MethodInfo m)
+        public static Action<S, $0> Create<S, $0>(MethodInfo m)
         {
             Action<S, $0> callback=
             (s, $1) =>
@@ -78,7 +78,7 @@ namespace UniJSON
                     var a = String.Join(", ", GetArgs("a", i).ToArray());
 
                     var source = @"
-        public static Delegate CreateWithThis<S, $0>(MethodInfo m, S instance)
+        public static Action<$0> CreateWithThis<S, $0>(MethodInfo m, S instance)
         {
             if (m.IsStatic)
             {
diff --git a/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericInvokeCallFactory.g.cs b/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericInvokeCallFactory.g.cs
index 7a63001fc..be4fc27f3 100644
--- a/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericInvokeCallFactory.g.cs
+++ b/Assets/VRM/UniJSON/Scripts/GenericCallUtility/GenericInvokeCallFactory.g.cs
@@ -10,7 +10,7 @@ namespace UniJSON
 
 //////////// Create
 
-        public static Delegate Create<S, A0>(MethodInfo m)
+        public static Action<S, A0> Create<S, A0>(MethodInfo m)
         {
             Action<S, A0> callback=
             (s, a0) =>
@@ -21,7 +21,7 @@ namespace UniJSON
         }
 
 
-        public static Delegate Create<S, A0, A1>(MethodInfo m)
+        public static Action<S, A0, A1> Create<S, A0, A1>(MethodInfo m)
         {
             Action<S, A0, A1> callback=
             (s, a0, a1) =>
@@ -32,7 +32,7 @@ namespace UniJSON
         }
 
 
-        public static Delegate Create<S, A0, A1, A2>(MethodInfo m)
+        public static Action<S, A0, A1, A2> Create<S, A0, A1, A2>(MethodInfo m)
         {
             Action<S, A0, A1, A2> callback=
             (s, a0, a1, a2) =>
@@ -44,7 +44,7 @@ namespace UniJSON
 
 //////////// CreateWithThis
 
-        public static Delegate CreateWithThis<S, A0>(MethodInfo m, S instance)
+        public static Action<A0> CreateWithThis<S, A0>(MethodInfo m, S instance)
         {
             if (m.IsStatic)
             {
@@ -70,7 +70,7 @@ namespace UniJSON
         }
 
 
-        public static Delegate CreateWithThis<S, A0, A1>(MethodInfo m, S instance)
+        public static Action<A0, A1> CreateWithThis<S, A0, A1>(MethodInfo m, S instance)
         {
             if (m.IsStatic)
             {
@@ -96,7 +96,7 @@ namespace UniJSON
         }
 
 
-        public static Delegate CreateWithThis<S, A0, A1, A2>(MethodInfo m, S instance)
+        public static Action<A0, A1, A2> CreateWithThis<S, A0, A1, A2>(MethodInfo m, S instance)
         {
             if (m.IsStatic)
             {
@@ -122,7 +122,7 @@ namespace UniJSON
         }
 
 
-        public static Delegate CreateWithThis<S, A0, A1, A2, A3>(MethodInfo m, S instance)
+        public static Action<A0, A1, A2, A3> CreateWithThis<S, A0, A1, A2, A3>(MethodInfo m, S instance)
         {
             if (m.IsStatic)
             {