diff --git a/elm.json b/elm.json
index d463605..c0c8506 100644
--- a/elm.json
+++ b/elm.json
@@ -3,7 +3,7 @@
     "name": "linsyking/messenger-core",
     "summary": "Core library for Messenger.",
     "license": "BSD-3-Clause",
-    "version": "1.1.0",
+    "version": "2.0.0",
     "exposed-modules": {
         "Definitions": [
             "Messenger.Recursion",
diff --git a/src/Messenger/GeneralModel.elm b/src/Messenger/GeneralModel.elm
index 4eabb8e..ec206b8 100644
--- a/src/Messenger/GeneralModel.elm
+++ b/src/Messenger/GeneralModel.elm
@@ -9,8 +9,9 @@ General model is designed to be an abstract interface of scenes, layers, compone
 
   - a: data type
   - b: environment type
-  - c: message type
-  - d: render type
+  - c: init type
+  - d: message type
+  - e: render type
 
 @docs NamedGeneralModel, NamelessGeneralModel
 
@@ -22,20 +23,20 @@ General model is designed to be an abstract interface of scenes, layers, compone
 This has a name field.
 
 -}
-type alias NamedGeneralModel a b c d =
+type alias NamedGeneralModel a b c d e =
     { name : String
     , data : a
     , init : b -> c -> a
-    , update : b -> c -> a -> ( a, b )
-    , view : b -> a -> d
+    , update : b -> d -> a -> ( a, b )
+    , view : b -> a -> e
     }
 
 
 {-| General Model without name field.
 -}
-type alias NamelessGeneralModel a b c d =
+type alias NamelessGeneralModel a b c d e =
     { data : a
     , init : b -> c -> a
-    , update : b -> c -> a -> ( a, b )
-    , view : b -> a -> d
+    , update : b -> d -> a -> ( a, b )
+    , view : b -> a -> e
     }