diff --git a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration13.kt b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration13.kt
index 83ab8609..0cf8cd9b 100644
--- a/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration13.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration13.kt
@@ -9,6 +9,7 @@ class Migration13 : Migration(12, 13) {
         addClassNameToStudents(database, getStudentsIds(database))
         updateSemestersTable(database)
         markAtLeastAndOnlyOneSemesterAtCurrent(database, getStudentsAndClassIds(database))
+        clearMessagesTable(database)
     }
 
     private fun addClassNameToStudents(database: SupportSQLiteDatabase, students: List<Pair<Int, String>>) {
@@ -56,4 +57,8 @@ class Migration13 : Migration(12, 13) {
             database.execSQL("UPDATE Semesters SET is_current = 1 WHERE id = (SELECT id FROM Semesters WHERE student_id = '$studentId' AND class_id = '$classId' ORDER BY semester_id DESC)")
         }
     }
+
+    private fun clearMessagesTable(database: SupportSQLiteDatabase) {
+        database.execSQL("DELETE FROM Messages")
+    }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageLocal.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageLocal.kt
index e9ab7297..411cca39 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageLocal.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageLocal.kt
@@ -24,13 +24,13 @@ class MessageLocal @Inject constructor(private val messagesDb: MessagesDao) {
     }
 
     fun getMessage(student: Student, id: Int): Maybe<Message> {
-        return messagesDb.load(student.studentId, id)
+        return messagesDb.load(student.id.toInt(), id)
     }
 
     fun getMessages(student: Student, folder: MessageFolder): Maybe<List<Message>> {
         return when (folder) {
-            TRASHED -> messagesDb.loadDeleted(student.studentId)
-            else -> messagesDb.loadAll(student.studentId, folder.id)
+            TRASHED -> messagesDb.loadDeleted(student.id.toInt())
+            else -> messagesDb.loadAll(student.id.toInt(), folder.id)
         }.filter { it.isNotEmpty() }
     }
 }
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRemote.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRemote.kt
index 3fb01d30..d50c40f3 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRemote.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRemote.kt
@@ -5,6 +5,7 @@ import io.github.wulkanowy.api.messages.Folder
 import io.github.wulkanowy.api.messages.SentMessage
 import io.github.wulkanowy.data.db.entities.Message
 import io.github.wulkanowy.data.db.entities.Recipient
+import io.github.wulkanowy.data.db.entities.Student
 import io.github.wulkanowy.utils.toLocalDateTime
 import io.reactivex.Single
 import org.threeten.bp.LocalDateTime.now
@@ -16,11 +17,11 @@ import io.github.wulkanowy.api.messages.Recipient as ApiRecipient
 @Singleton
 class MessageRemote @Inject constructor(private val api: Api) {
 
-    fun getMessages(studentId: Int, folder: MessageFolder): Single<List<Message>> {
+    fun getMessages(student: Student, folder: MessageFolder): Single<List<Message>> {
         return api.getMessages(Folder.valueOf(folder.name)).map { messages ->
             messages.map {
                 Message(
-                    studentId = studentId,
+                    studentId = student.id.toInt(),
                     realId = it.id ?: 0,
                     messageId = it.messageId ?: 0,
                     sender = it.sender.orEmpty(),
diff --git a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRepository.kt b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRepository.kt
index d319689e..3b4f9582 100644
--- a/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRepository.kt
+++ b/app/src/main/java/io/github/wulkanowy/data/repositories/message/MessageRepository.kt
@@ -28,7 +28,7 @@ class MessageRepository @Inject constructor(
                 local.getMessages(student, folder).filter { !forceRefresh }
                     .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
                         .flatMap {
-                            if (it) remote.getMessages(student.studentId, folder)
+                            if (it) remote.getMessages(student, folder)
                             else Single.error(UnknownHostException())
                         }.flatMap { new ->
                             local.getMessages(student, folder).toSingle(emptyList())