diff --git a/source/src/main/java/one/nem/lacerta/source/database/LacertaDatabase.java b/source/src/main/java/one/nem/lacerta/source/database/LacertaDatabase.java
index bb8667ab..47e0e4bb 100644
--- a/source/src/main/java/one/nem/lacerta/source/database/LacertaDatabase.java
+++ b/source/src/main/java/one/nem/lacerta/source/database/LacertaDatabase.java
@@ -4,6 +4,8 @@ import androidx.room.Database;
 import androidx.room.RoomDatabase;
 
 // Entities
+import one.nem.lacerta.source.database.dao.FolderDao;
+import one.nem.lacerta.source.database.entity.FolderEntity;
 import one.nem.lacerta.source.database.entity.TagEntity;
 import one.nem.lacerta.source.database.entity.DocumentEntity;
 import one.nem.lacerta.source.database.entity.LibraryEntity;
@@ -17,11 +19,12 @@ import one.nem.lacerta.source.database.dao.LibraryDao;
 import one.nem.lacerta.source.database.dao.VcsRevDao;
 import one.nem.lacerta.source.database.dao.VcsLogDao;
 
-@Database(entities = {TagEntity.class, DocumentEntity.class, LibraryEntity.class, VcsRevEntity.class, VcsLogEntity.class}, version = 3)
+@Database(entities = {TagEntity.class, DocumentEntity.class, LibraryEntity.class, VcsRevEntity.class, VcsLogEntity.class, FolderEntity.class}, version = 4)
 public abstract class LacertaDatabase extends RoomDatabase {
     public abstract TagDao tagDao();
     public abstract DocumentDao documentDao();
     public abstract LibraryDao libraryDao();
     public abstract VcsRevDao vcsRevDao();
     public abstract VcsLogDao vcsLogDao();
+    public abstract FolderDao folderDao();
 }