diff --git a/build.gradle.kts b/build.gradle.kts
index 674d0a0..d212ba0 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -65,7 +65,7 @@ dependencies {
 
 ktor {
     fatJar {
-        archiveFileName.set("fat.jar")
+        archiveFileName.set("${rootProject.name}-${rootProject.version}.jar")
     }
 
     docker {
diff --git a/src/main/kotlin/es/wokis/data/datasource/invoice/InvoiceLocalDataSource.kt b/src/main/kotlin/es/wokis/data/datasource/invoice/InvoiceLocalDataSource.kt
index 90757eb..797bf4b 100644
--- a/src/main/kotlin/es/wokis/data/datasource/invoice/InvoiceLocalDataSource.kt
+++ b/src/main/kotlin/es/wokis/data/datasource/invoice/InvoiceLocalDataSource.kt
@@ -5,7 +5,10 @@ import es.wokis.data.bo.invoice.InvoiceBO
 import es.wokis.data.dbo.invoice.InvoiceDBO
 import es.wokis.data.mapper.invoice.toBO
 import es.wokis.data.mapper.invoice.toDBO
+import org.bson.types.ObjectId
+import org.litote.kmongo.Id
 import org.litote.kmongo.eq
+import org.litote.kmongo.id.toId
 import org.litote.kmongo.updateOne
 import java.util.regex.Pattern
 
@@ -13,7 +16,7 @@ interface InvoiceLocalDataSource {
     suspend fun getInvoicesOfUser(id: String): List<InvoiceBO>
     suspend fun addInvoices(id: String, invoices: List<InvoiceBO>): Boolean
     suspend fun updateInvoices(id: String, invoices: List<InvoiceBO>): Boolean
-    suspend fun deleteInvoices(id: String, invoices: List<InvoiceBO>): Boolean
+    suspend fun deleteInvoices(id: String, invoicesIds: List<String>): Boolean
 }
 
 class InvoiceLocalDataSourceImpl(private val invoiceCollection: MongoCollection<InvoiceDBO>) : InvoiceLocalDataSource {
@@ -45,9 +48,10 @@ class InvoiceLocalDataSourceImpl(private val invoiceCollection: MongoCollection<
         false
     }
 
-    override suspend fun deleteInvoices(id: String, invoices: List<InvoiceBO>): Boolean = try {
-        invoices.toDBO().map {
-            invoiceCollection.deleteOne(InvoiceDBO::id eq it.id).wasAcknowledged()
+    override suspend fun deleteInvoices(id: String, invoicesIds: List<String>): Boolean = try {
+        invoicesIds.map {
+            val bsonId: Id<InvoiceDBO> = ObjectId(it).toId()
+            invoiceCollection.deleteOne(InvoiceDBO::id eq bsonId).wasAcknowledged()
         }.all { it }
 
     } catch (e: Throwable) {
diff --git a/src/main/kotlin/es/wokis/data/dbo/user/UserDBO.kt b/src/main/kotlin/es/wokis/data/dbo/user/UserDBO.kt
index 59dabec..d69adba 100644
--- a/src/main/kotlin/es/wokis/data/dbo/user/UserDBO.kt
+++ b/src/main/kotlin/es/wokis/data/dbo/user/UserDBO.kt
@@ -1,6 +1,7 @@
 package es.wokis.data.dbo.user
 
 import es.wokis.data.constants.ServerConstants
+import es.wokis.data.constants.ServerConstants.DEFAULT_LANG
 import org.bson.codecs.pojo.annotations.BsonId
 import org.litote.kmongo.Id
 
@@ -10,7 +11,7 @@ data class UserDBO(
     val username: String,
     val email: String,
     val password: String,
-    val lang: String,
+    val lang: String = DEFAULT_LANG,
     val image: String = ServerConstants.EMPTY_TEXT,
     val devices: List<String> = emptyList()
 )
\ No newline at end of file
diff --git a/src/main/kotlin/es/wokis/data/repository/invoices/InvoiceRepository.kt b/src/main/kotlin/es/wokis/data/repository/invoices/InvoiceRepository.kt
index 9a952c6..a7900d6 100644
--- a/src/main/kotlin/es/wokis/data/repository/invoices/InvoiceRepository.kt
+++ b/src/main/kotlin/es/wokis/data/repository/invoices/InvoiceRepository.kt
@@ -7,7 +7,7 @@ interface InvoiceRepository {
     suspend fun getInvoicesOfUser(id: String): List<InvoiceBO>
     suspend fun addInvoices(id: String, invoices: List<InvoiceBO>): Boolean
     suspend fun updateInvoices(id: String, invoices: List<InvoiceBO>): Boolean
-    suspend fun deleteInvoices(id: String, invoices: List<InvoiceBO>): Boolean
+    suspend fun deleteInvoices(id: String, invoicesIds: List<String>): Boolean
 }
 
 class InvoiceRepositoryImpl(private val invoiceLocalDataSource: InvoiceLocalDataSource) : InvoiceRepository {
@@ -20,6 +20,6 @@ class InvoiceRepositoryImpl(private val invoiceLocalDataSource: InvoiceLocalData
     override suspend fun updateInvoices(id: String, invoices: List<InvoiceBO>): Boolean =
         invoiceLocalDataSource.updateInvoices(id, invoices)
 
-    override suspend fun deleteInvoices(id: String, invoices: List<InvoiceBO>): Boolean =
-        invoiceLocalDataSource.deleteInvoices(id, invoices)
+    override suspend fun deleteInvoices(id: String, invoicesIds: List<String>): Boolean =
+        invoiceLocalDataSource.deleteInvoices(id, invoicesIds)
 }
\ No newline at end of file
diff --git a/src/main/kotlin/es/wokis/routing/InvoicesRouting.kt b/src/main/kotlin/es/wokis/routing/InvoicesRouting.kt
index ce51bfc..2d362dc 100644
--- a/src/main/kotlin/es/wokis/routing/InvoicesRouting.kt
+++ b/src/main/kotlin/es/wokis/routing/InvoicesRouting.kt
@@ -45,9 +45,9 @@ fun Routing.setUpInvoicesRouting() {
 
         delete("/invoices") {
             val user = call.user
-            val invoices = call.receive<List<InvoiceDTO>>()
+            val invoicesIds = call.receive<List<String>>()
             user?.id?.let {
-                val userInvoices = invoiceRepository.deleteInvoices(it, invoices.toBO())
+                val userInvoices = invoiceRepository.deleteInvoices(it, invoicesIds)
                 call.respond(HttpStatusCode.OK, userInvoices)
             } ?: call.respond(HttpStatusCode.Unauthorized)
         }
diff --git a/src/main/resources/application.conf b/src/main/resources/application.conf
index 8ac2e4d..0dd8e1b 100644
--- a/src/main/resources/application.conf
+++ b/src/main/resources/application.conf
@@ -13,7 +13,7 @@ ktor {
 
 #jwt config
 jwt {
-    domain = "https://finance.projectalpha.es/"
+    domain = "https://finance.wokis.es/"
     audience = "wokis"
     realm = "projectfinance wokis"
 }