diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 306b486..dbe28f1 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -15,6 +15,7 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
+        tools:replace="android:allowBackup"
         android:theme="@style/AppTheme.Light">
         <activity android:name=".QrCodeActivity" />
         <activity android:name=".PdfViewerActivity" />
diff --git a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/MyDatabase.kt b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/MyDatabase.kt
index 28ff7ed..87f2523 100644
--- a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/MyDatabase.kt
+++ b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/MyDatabase.kt
@@ -4,6 +4,7 @@ import android.content.Context
 import fr.sanchezm.attestationsCovid19.data.db.dao.AttestationDao
 import fr.sanchezm.attestationsCovid19.data.db.dao.ConfigDao
 import fr.sanchezm.attestationsCovid19.data.db.dao.ProfileDao
+import fr.sanchezm.attestationsCovid19.data.repository.ConfigRepository
 
 class MyDatabase private constructor(private val savePath: String, private val filesPath: String) {
 
@@ -11,10 +12,15 @@ class MyDatabase private constructor(private val savePath: String, private val f
     private var _attestationDao: AttestationDao? = null
     private var _configDao: ConfigDao? = null
 
-    fun profileDao(): ProfileDao = _profileDao ?: ProfileDao(savePath).also { _profileDao = it }
+    fun profileDao(configRepository: ConfigRepository): ProfileDao =
+        _profileDao ?: ProfileDao(savePath, configRepository).also { _profileDao = it }
 
-    fun attestationDao(): AttestationDao =
-        _attestationDao ?: AttestationDao(savePath, filesPath).also { _attestationDao = it }
+    fun attestationDao(configRepository: ConfigRepository): AttestationDao =
+        _attestationDao ?: AttestationDao(
+            savePath,
+            filesPath,
+            configRepository
+        ).also { _attestationDao = it }
 
     fun configDao(): ConfigDao = _configDao ?: ConfigDao(savePath).also { _configDao = it }
 
@@ -28,40 +34,3 @@ class MyDatabase private constructor(private val savePath: String, private val f
         }
     }
 }
-
-/*
-import android.content.Context
-import androidx.room.Database
-import androidx.room.Room
-import androidx.room.RoomDatabase
-import fr.sanchezm.attestationsCovid19.data.db.dao.AttestationDao
-import fr.sanchezm.attestationsCovid19.data.db.dao.ProfileDao
-import fr.sanchezm.attestationsCovid19.data.db.entity.Profile
-
-@Database(
-    entities = [Profile::class],
-    version = 1
-)
-abstract class MyDatabase private constructor() : RoomDatabase() {
-
-    abstract fun profileDao(): ProfileDao
-    abstract fun attestationDao(): AttestationDao
-
-    companion object {
-        @Volatile
-        private var instance: MyDatabase? = null
-        private val LOCK = Any()
-
-        operator fun invoke(context: Context) = instance ?: synchronized(LOCK) {
-            instance ?: buildDatabase(context).also { instance = it }
-        }
-
-        private fun buildDatabase(context: Context) =
-            Room.databaseBuilder(
-                context.applicationContext,
-                MyDatabase::class.java, "data.db"
-            )
-                .build()
-    }
-}
-*/
diff --git a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/dao/AttestationDao.kt b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/dao/AttestationDao.kt
index 417f7ef..86fec2e 100644
--- a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/dao/AttestationDao.kt
+++ b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/dao/AttestationDao.kt
@@ -6,10 +6,15 @@ import androidx.lifecycle.MutableLiveData
 import com.google.gson.Gson
 import com.google.gson.reflect.TypeToken
 import fr.sanchezm.attestationsCovid19.data.db.entity.Attestation
+import fr.sanchezm.attestationsCovid19.data.repository.ConfigRepository
 import fr.sanchezm.attestationsCovid19.utilities.PdfUtils
 import java.io.File
 
-class AttestationDao(private val savePath: String, private val filesPath: String) {
+class AttestationDao(
+    private val savePath: String,
+    private val filesPath: String,
+    private val configRepository: ConfigRepository
+) {
 
     private val _attestations = MutableLiveData<ArrayList<Attestation>>()
     private val fileName = "attestation.db"
@@ -23,9 +28,8 @@ class AttestationDao(private val savePath: String, private val filesPath: String
         _attestations.value?.elementAt(id)
 
     fun addAttestation(attestation: Attestation) {
-        _attestations.value = _attestations.value ?: ArrayList()
-
         _attestations.value?.add(attestation)
+        _attestations.value = _attestations.value
         Log.d(TAG, "Add Attestation : $attestation")
         save()
     }
@@ -66,6 +70,8 @@ class AttestationDao(private val savePath: String, private val filesPath: String
 
         if (file.exists()) {
             _attestations.value = Gson().fromJson(file.readText(Charsets.UTF_8), type)
+        } else {
+            _attestations.value = ArrayList()
         }
         _attestations.value?.forEach {
             val filePath = PdfUtils.getPath(filesPath, it.createAt)
diff --git a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/dao/ProfileDao.kt b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/dao/ProfileDao.kt
index c152df5..7f1e4ac 100644
--- a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/dao/ProfileDao.kt
+++ b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/dao/ProfileDao.kt
@@ -1,48 +1,69 @@
 package fr.sanchezm.attestationsCovid19.data.db.dao
 
+import android.util.Log
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+import fr.sanchezm.attestationsCovid19.BuildConfig
 import fr.sanchezm.attestationsCovid19.data.db.entity.Profile
+import fr.sanchezm.attestationsCovid19.data.repository.ConfigRepository
+import fr.sanchezm.attestationsCovid19.utilities.DbMigration
 import java.io.File
 
-class ProfileDao(private val path: String) {
+class ProfileDao(private val path: String, private val configRepository: ConfigRepository) {
 
-    private val _profile = MutableLiveData<Profile>()
+    private val _profile = MutableLiveData<ArrayList<Profile>>()
     private val fileName = "profile.db"
+    private val type = object : TypeToken<ArrayList<Profile>>() {}.type
 
-    fun getProfile(): LiveData<Profile> =
-        _profile
+    @Suppress("UNCHECKED_CAST")
+    fun getProfiles(): LiveData<List<Profile>> =
+        _profile as LiveData<List<Profile>>
 
-    fun updateProfile(profile: Profile) {
-        _profile.value = profile
+    fun addProfile(profile: Profile) {
+        _profile.value?.add(profile)
+        _profile.value = _profile.value
         save()
     }
 
     init {
-        load()
+        val currentDbVersion = configRepository.getConfig().value!!.dbVersion
+        val appDbVersion = BuildConfig.DB_VERSION
+
+        if (currentDbVersion != appDbVersion) {
+            if (currentDbVersion == 1 && appDbVersion == 2) {
+                _profile.value = DbMigration.migrateProfileFrom1To2("$path/$fileName")
+                save()
+                configRepository.getConfig().value!!.let {
+                    it.dbVersion = appDbVersion
+                    configRepository.updateConfig(it)
+                }
+                Log.d(TAG, "Db version update from $currentDbVersion to $appDbVersion")
+            } else {
+                File("$path/$fileName").delete()
+                load()
+            }
+        } else {
+            load()
+        }
     }
 
     private fun load() {
         val file = File("$path/$fileName")
 
         if (file.exists()) {
-            _profile.value = Gson().fromJson(file.readText(Charsets.UTF_8), Profile::class.java)
+            _profile.value = Gson().fromJson(file.readText(Charsets.UTF_8), type)
         } else {
-            _profile.value = Profile("", "", "", "", "", "", "")
+            _profile.value = ArrayList()
         }
     }
 
     private fun save() {
         File("$path/$fileName").writeText(Gson().toJson(_profile.value))
     }
-}
 
-//@Dao
-//interface ProfileDao {
-//    @Insert(onConflict = OnConflictStrategy.REPLACE)
-//    fun insert(profile: Profile)
-//
-//    @Query(value = "SELECT * FROM profile WHERE id = $CURRENT_PROFILE_ID")
-//    fun getProfile(): LiveData<Profile>
-//}
+    companion object {
+        private val TAG = ProfileDao::class.simpleName
+    }
+}
diff --git a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Attestation.kt b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Attestation.kt
index 5971e30..bccc7d1 100644
--- a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Attestation.kt
+++ b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Attestation.kt
@@ -5,7 +5,6 @@ import java.util.*
 
 const val PATTERN = "dd/MM/yyyy 'a' HH'h'mm"
 
-//@Entity(tableName = "attestation")
 data class Attestation(
     val profile: Profile,
     val exitDate: String,
diff --git a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Config.kt b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Config.kt
index 3f479d2..aa0344d 100644
--- a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Config.kt
+++ b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Config.kt
@@ -1,7 +1,7 @@
 package fr.sanchezm.attestationsCovid19.data.db.entity
 
 data class Config(
-    val dbVersion: Int,
+    var dbVersion: Int,
     var versionName: String,
     var versionCode: Int
 )
\ No newline at end of file
diff --git a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Profile.kt b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Profile.kt
index 6d3ae1d..b224b19 100644
--- a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Profile.kt
+++ b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/db/entity/Profile.kt
@@ -1,6 +1,5 @@
 package fr.sanchezm.attestationsCovid19.data.db.entity
 
-//@Entity(tableName = "profile")
 data class Profile(
     val firstName: String,
     val lastName: String,
@@ -10,8 +9,6 @@ data class Profile(
     val city: String,
     val postalCode: String
 ) {
-//    @PrimaryKey
-//    var id: Int = CURRENT_PROFILE_ID
 
     override fun toString(): String {
         return "Nom: $lastName; Prenom: $firstName; Naissance: $birthday a $birthPlace; Adresse: $address $postalCode $city"
diff --git a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/repository/ProfileRepository.kt b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/repository/ProfileRepository.kt
index ab40224..8b45668 100644
--- a/app/src/main/java/fr/sanchezm/attestationsCovid19/data/repository/ProfileRepository.kt
+++ b/app/src/main/java/fr/sanchezm/attestationsCovid19/data/repository/ProfileRepository.kt
@@ -6,11 +6,11 @@ import fr.sanchezm.attestationsCovid19.data.db.entity.Profile
 
 class ProfileRepository private constructor(private val profileDao: ProfileDao) {
 
-    fun getProfile(): LiveData<Profile> =
-        profileDao.getProfile()
+    fun getProfiles(): LiveData<List<Profile>> =
+        profileDao.getProfiles()
 
     fun insertProfile(profile: Profile) =
-        profileDao.updateProfile(profile)
+        profileDao.addProfile(profile)
 
     companion object {
         @Volatile
diff --git a/app/src/main/java/fr/sanchezm/attestationsCovid19/ui/add/AddViewModel.kt b/app/src/main/java/fr/sanchezm/attestationsCovid19/ui/add/AddViewModel.kt
index 2ad4498..b195b5e 100644
--- a/app/src/main/java/fr/sanchezm/attestationsCovid19/ui/add/AddViewModel.kt
+++ b/app/src/main/java/fr/sanchezm/attestationsCovid19/ui/add/AddViewModel.kt
@@ -81,15 +81,15 @@ class AddViewModel(
     }
 
     private fun setProfileValue() {
-        val profile = profileRepository.getProfile()
+        val profile = profileRepository.getProfiles().value?.first()
 
-        firstName.value = profile.value?.firstName
-        lastName.value = profile.value?.lastName
-        birthday.value = profile.value?.birthday
-        birthPlace.value = profile.value?.birthPlace
-        address.value = profile.value?.address
-        city.value = profile.value?.city
-        postalCode.value = profile.value?.postalCode
+        firstName.value = profile?.firstName
+        lastName.value = profile?.lastName
+        birthday.value = profile?.birthday
+        birthPlace.value = profile?.birthPlace
+        address.value = profile?.address
+        city.value = profile?.city
+        postalCode.value = profile?.postalCode
     }
 
     private fun setDateHourToday() {
diff --git a/app/src/main/java/fr/sanchezm/attestationsCovid19/utilities/DbMigration.kt b/app/src/main/java/fr/sanchezm/attestationsCovid19/utilities/DbMigration.kt
new file mode 100644
index 0000000..6d5b41b
--- /dev/null
+++ b/app/src/main/java/fr/sanchezm/attestationsCovid19/utilities/DbMigration.kt
@@ -0,0 +1,22 @@
+package fr.sanchezm.attestationsCovid19.utilities
+
+import com.google.gson.Gson
+import fr.sanchezm.attestationsCovid19.data.db.entity.Profile
+import java.io.File
+
+object DbMigration {
+
+    fun migrateProfileFrom1To2(filename: String): ArrayList<Profile> {
+        val file = File(filename)
+        val list = ArrayList<Profile>()
+
+        val profile: Profile = if (file.exists()) {
+            Gson().fromJson(file.readText(Charsets.UTF_8), Profile::class.java)
+        } else {
+            Profile("", "", "", "", "", "", "")
+        }
+        list.add(profile)
+
+        return list
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/fr/sanchezm/attestationsCovid19/utilities/InjectorUtils.kt b/app/src/main/java/fr/sanchezm/attestationsCovid19/utilities/InjectorUtils.kt
index 9e0f85d..e8d5df9 100644
--- a/app/src/main/java/fr/sanchezm/attestationsCovid19/utilities/InjectorUtils.kt
+++ b/app/src/main/java/fr/sanchezm/attestationsCovid19/utilities/InjectorUtils.kt
@@ -39,11 +39,12 @@ object InjectorUtils {
 
     private fun getAttestationRepo(context: Context): AttestationRepository =
         AttestationRepository.getInstance(
-            MyDatabase.invoke(context, getMyFilesDir(context)).attestationDao()
+            MyDatabase.invoke(context, getMyFilesDir(context))
+                .attestationDao(getConfigRepo(context))
         )
 
     private fun getProfileRepo(context: Context): ProfileRepository = ProfileRepository.getInstance(
-        MyDatabase.invoke(context, getMyFilesDir(context)).profileDao()
+        MyDatabase.invoke(context, getMyFilesDir(context)).profileDao(getConfigRepo(context))
     )
 
     private fun getConfigRepo(context: Context): ConfigRepository = ConfigRepository.getInstance(
diff --git a/build.gradle b/build.gradle
index 6c8070b..1d6f210 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,8 +3,7 @@
 buildscript {
     ext {
         kotlin_version = '1.3.72'
-        db_version = '1'
-
+        db_version = '2'
     }
 
     repositories {