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 aae73629..4909c922 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
@@ -1,6 +1,7 @@
 package one.nem.lacerta.source.database;
 
 import androidx.room.Database;
+import androidx.room.RoomDatabase;
 
 // Entities
 import one.nem.lacerta.source.database.entity.Tag;
@@ -13,7 +14,7 @@ import one.nem.lacerta.source.database.dao.DocumentDao;
 import one.nem.lacerta.source.database.dao.LibraryDao;
 
 @Database(entities = {Tag.class, Document.class, Library.class}, version = 1)
-public abstract class LacertaDatabase {
+public abstract class LacertaDatabase extends RoomDatabase {
     public abstract TagDao tagDao();
     public abstract DocumentDao documentDao();
     public abstract LibraryDao libraryDao();