diff --git a/Class_Diagram.md b/Class_Diagram.md
index d75e0c9..5ae4b0f 100644
--- a/Class_Diagram.md
+++ b/Class_Diagram.md
@@ -151,9 +151,10 @@ package Model <<Frame>> #bada55 {
   
   package Games #daf {
   
-    class GameRunner $done {
+    class MasterOfCeremonies $done {
       /+GlobalPlayerManager: IManager<Player>
-      /+GlobalDieManager: IManager<KeyValuePair<string, [*] Die>>
+      /+DiceGroupManager: IManager<KeyValuePair<string, [*] Die>>
+      /+GameManager: IManager<Game>
       {static} +PlayGame(game: Game)
       +StartNewGame(name: string, players: IManager<Player>, dice: [*] Die): Game
     }
@@ -164,10 +165,10 @@ package Model <<Frame>> #bada55 {
 
 Stub ..|> ILoader
 
-ILoader --> "/+GameRunner" GameRunner
+ILoader --> "/+MasterOfCeremonies" MasterOfCeremonies
 
 Program --> "/+Loader" ILoader
-Program --> "/+GameRunner" GameRunner
+Program --> "/+MasterOfCeremonies" MasterOfCeremonies
 
 DiceAppDbContextWithStub --|> DiceAppDbContext
 DiceAppDbContext --|> System.Data.Entity.DbContext