diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/SuperHeroesApplication.kt b/app/src/main/java/com/karumi/jetpack/superheroes/SuperHeroesApplication.kt
index 223714a..8409260 100644
--- a/app/src/main/java/com/karumi/jetpack/superheroes/SuperHeroesApplication.kt
+++ b/app/src/main/java/com/karumi/jetpack/superheroes/SuperHeroesApplication.kt
@@ -1,10 +1,13 @@
 package com.karumi.jetpack.superheroes
 
 import android.app.Application
+import androidx.room.Room
+import com.karumi.jetpack.superheroes.common.SuperHeroesDatabase
 import com.karumi.jetpack.superheroes.common.module
 import com.karumi.jetpack.superheroes.data.repository.LocalSuperHeroDataSource
 import com.karumi.jetpack.superheroes.data.repository.RemoteSuperHeroDataSource
 import com.karumi.jetpack.superheroes.data.repository.SuperHeroRepository
+import com.karumi.jetpack.superheroes.data.repository.room.SuperHeroDao
 import org.kodein.di.Kodein
 import org.kodein.di.KodeinAware
 import org.kodein.di.android.androidModule
@@ -30,11 +33,23 @@ class SuperHeroesApplication : Application(), KodeinAware {
     }
 
     private fun appDependencies(): Kodein.Module = module {
+        bind<SuperHeroesDatabase>() with singleton {
+            Room.databaseBuilder(
+                this@SuperHeroesApplication,
+                SuperHeroesDatabase::class.java,
+                "superheroes-db"
+            ).fallbackToDestructiveMigration()
+                .build()
+        }
+        bind<SuperHeroDao>() with provider {
+            val database: SuperHeroesDatabase = instance()
+            database.superHeroesDao()
+        }
         bind<SuperHeroRepository>() with provider {
             SuperHeroRepository(instance(), instance())
         }
         bind<LocalSuperHeroDataSource>() with singleton {
-            LocalSuperHeroDataSource()
+            LocalSuperHeroDataSource(instance())
         }
         bind<RemoteSuperHeroDataSource>() with provider {
             RemoteSuperHeroDataSource()
diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/common/SuperHeroesDatabase.kt b/app/src/main/java/com/karumi/jetpack/superheroes/common/SuperHeroesDatabase.kt
new file mode 100644
index 0000000..bb596dc
--- /dev/null
+++ b/app/src/main/java/com/karumi/jetpack/superheroes/common/SuperHeroesDatabase.kt
@@ -0,0 +1,11 @@
+package com.karumi.jetpack.superheroes.common
+
+import androidx.room.Database
+import androidx.room.RoomDatabase
+import com.karumi.jetpack.superheroes.data.repository.room.SuperHeroDao
+import com.karumi.jetpack.superheroes.data.repository.room.SuperHeroEntity
+
+@Database(entities = [SuperHeroEntity::class], version = 1)
+abstract class SuperHeroesDatabase : RoomDatabase() {
+    abstract fun superHeroesDao(): SuperHeroDao
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/data/repository/LocalSuperHeroDataSource.kt b/app/src/main/java/com/karumi/jetpack/superheroes/data/repository/LocalSuperHeroDataSource.kt
index 6c30e58..bf99cb0 100644
--- a/app/src/main/java/com/karumi/jetpack/superheroes/data/repository/LocalSuperHeroDataSource.kt
+++ b/app/src/main/java/com/karumi/jetpack/superheroes/data/repository/LocalSuperHeroDataSource.kt
@@ -1,37 +1,32 @@
 package com.karumi.jetpack.superheroes.data.repository
 
+import com.karumi.jetpack.superheroes.data.repository.room.SuperHeroDao
+import com.karumi.jetpack.superheroes.data.repository.room.SuperHeroEntity
 import com.karumi.jetpack.superheroes.domain.model.SuperHero
 
-class LocalSuperHeroDataSource {
-    companion object {
-        private const val BIT_TIME = 250L
-    }
-
-    private val superHeroes: MutableMap<String, SuperHero> = mutableMapOf()
+class LocalSuperHeroDataSource(
+    private val dao: SuperHeroDao
+) {
+    fun getAllSuperHeroes(): List<SuperHero> =
+        dao.getAll()
+            .map { it.toSuperHero() }
 
-    fun getAllSuperHeroes(): List<SuperHero> {
-        waitABit()
-        return superHeroes.values.toList()
-    }
-
-    fun get(id: String): SuperHero? {
-        waitABit()
-        return superHeroes[id]
-    }
+    fun get(id: String): SuperHero? =
+        dao.getById(id)?.toSuperHero()
 
     fun saveAll(all: List<SuperHero>) {
-        waitABit()
-        superHeroes.clear()
-        superHeroes.putAll(all.associateBy { it.id })
+        dao.deleteAll()
+        dao.insertAll(all.map { it.toEntity() })
     }
 
     fun save(superHero: SuperHero): SuperHero {
-        waitABit()
-        superHeroes[superHero.id] = superHero
+        dao.insertAll(listOf(superHero.toEntity()))
         return superHero
     }
 
-    private fun waitABit() {
-        Thread.sleep(BIT_TIME)
-    }
+    private fun SuperHeroEntity.toSuperHero(): SuperHero =
+        SuperHero(id, name, photo, isAvenger, description)
+
+    private fun SuperHero.toEntity(): SuperHeroEntity =
+        SuperHeroEntity(id, name, photo, isAvenger, description)
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/data/repository/room/SuperHeroDao.kt b/app/src/main/java/com/karumi/jetpack/superheroes/data/repository/room/SuperHeroDao.kt
new file mode 100644
index 0000000..efa3d9d
--- /dev/null
+++ b/app/src/main/java/com/karumi/jetpack/superheroes/data/repository/room/SuperHeroDao.kt
@@ -0,0 +1,21 @@
+package com.karumi.jetpack.superheroes.data.repository.room
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+
+@Dao
+interface SuperHeroDao {
+    @Query("SELECT * FROM superheroes ORDER BY id ASC")
+    fun getAll(): List<SuperHeroEntity>
+
+    @Query("SELECT * FROM superheroes WHERE id = :id")
+    fun getById(id: String): SuperHeroEntity?
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    fun insertAll(superHeroes: List<SuperHeroEntity>)
+
+    @Query("DELETE FROM superheroes")
+    fun deleteAll()
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/karumi/jetpack/superheroes/data/repository/room/SuperHeroEntity.kt b/app/src/main/java/com/karumi/jetpack/superheroes/data/repository/room/SuperHeroEntity.kt
new file mode 100644
index 0000000..2d098e2
--- /dev/null
+++ b/app/src/main/java/com/karumi/jetpack/superheroes/data/repository/room/SuperHeroEntity.kt
@@ -0,0 +1,13 @@
+package com.karumi.jetpack.superheroes.data.repository.room
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "superheroes")
+data class SuperHeroEntity(
+    @PrimaryKey val id: String,
+    val name: String,
+    val photo: String?,
+    val isAvenger: Boolean,
+    val description: String
+)
\ No newline at end of file