diff --git a/app/src/main/java/com/gh/gamecenter/room/AppDatabase.java b/app/src/main/java/com/gh/gamecenter/room/AppDatabase.java
index f9fe1bccc3..7f9402ff9b 100644
--- a/app/src/main/java/com/gh/gamecenter/room/AppDatabase.java
+++ b/app/src/main/java/com/gh/gamecenter/room/AppDatabase.java
@@ -77,7 +77,7 @@ public abstract class AppDatabase extends RoomDatabase {
         @Override
         public void migrate(@NonNull SupportSQLiteDatabase database) {
             database.execSQL("Alter TABLE AnswerEntity add articleTitle TEXT");
-            database.execSQL("Alter TABLE AnswerEntity add type TEXT");
+            database.execSQL("Alter TABLE AnswerEntity add type TEXT NOT NULL");
         }
     };