diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index dfe19f4..900ffd5 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,6 +1,6 @@
 [versions]
 # Plugins
-kotlin = "2.3.0"
+kotlin = "2.4.0"
 maven-publish = "0.36.0"
 androidGradlePlugin = "9.0.0"
 
diff --git a/jecnaapi-canteen/src/commonMain/kotlin/io/github/tomhula/jecnaapi/CanteenClient.kt b/jecnaapi-canteen/src/commonMain/kotlin/io/github/tomhula/jecnaapi/CanteenClient.kt
index b3066eb..dc7a34f 100644
--- a/jecnaapi-canteen/src/commonMain/kotlin/io/github/tomhula/jecnaapi/CanteenClient.kt
+++ b/jecnaapi-canteen/src/commonMain/kotlin/io/github/tomhula/jecnaapi/CanteenClient.kt
@@ -5,6 +5,7 @@ import io.github.tomhula.jecnaapi.data.canteen.ExchangeItem
 import io.github.tomhula.jecnaapi.data.canteen.MenuItem
 import io.github.tomhula.jecnaapi.data.canteen.MenuPage
 import io.github.tomhula.jecnaapi.data.canteen.Orderable
+import io.github.tomhula.jecnaapi.parser.ParseException
 import io.github.tomhula.jecnaapi.web.Auth
 import kotlinx.coroutines.flow.Flow
 import kotlinx.datetime.LocalDate
@@ -14,15 +15,24 @@ import kotlinx.datetime.LocalDate
  */
 interface CanteenClient
 {
+    @Throws(RuntimeException::class)
     suspend fun login(auth: Auth): Boolean
+    @Throws(RuntimeException::class)
     suspend fun login(username: String, password: String) = login(Auth(username, password))
+    @Throws(RuntimeException::class)
     suspend fun logout()
+    @Throws(RuntimeException::class)
     suspend fun isLoggedIn(): Boolean
     /** Prefer using [getMenuAsync] instead. */
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getMenuPage(): MenuPage
+    @Throws(ParseException::class, RuntimeException::class)
     fun getMenuAsync(days: Iterable<LocalDate>): Flow<DayMenu>
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getDayMenu(day: LocalDate): DayMenu
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getExchange(): List<ExchangeItem>
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getCredit(): Float
     /**
      * Places an order for the given [orderable].
@@ -33,7 +43,9 @@ interface CanteenClient
      * @param orderable The [io.github.tomhula.jecnaapi.canteen.Orderable] to order.
      * @return -1f for success with no credit info, non-negative value for a new credit, or null for failure.
      */
+    @Throws(RuntimeException::class)
     suspend fun order(orderable: Orderable): Float?
+    @Throws(RuntimeException::class)
     suspend fun putOnExchange(menuItem: MenuItem): Boolean
 
     companion object
diff --git a/jecnaapi-jecna/src/commonMain/kotlin/io/github/tomhula/jecnaapi/JecnaClient.kt b/jecnaapi-jecna/src/commonMain/kotlin/io/github/tomhula/jecnaapi/JecnaClient.kt
index 9d40c05..52d99c4 100644
--- a/jecnaapi-jecna/src/commonMain/kotlin/io/github/tomhula/jecnaapi/JecnaClient.kt
+++ b/jecnaapi-jecna/src/commonMain/kotlin/io/github/tomhula/jecnaapi/JecnaClient.kt
@@ -17,6 +17,7 @@ import io.github.tomhula.jecnaapi.data.schoolStaff.TeachersPage
 import io.github.tomhula.jecnaapi.data.student.Locker
 import io.github.tomhula.jecnaapi.data.student.Student
 import io.github.tomhula.jecnaapi.data.timetable.TimetablePage
+import io.github.tomhula.jecnaapi.parser.ParseException
 import io.github.tomhula.jecnaapi.util.SchoolYear
 import io.github.tomhula.jecnaapi.util.SchoolYearHalf
 import io.github.tomhula.jecnaapi.web.Auth
@@ -26,34 +27,61 @@ import kotlin.time.Duration.Companion.seconds
 
 interface JecnaClient
 {
+    @Throws(IllegalStateException::class, RuntimeException::class)
     suspend fun login(auth: Auth): Boolean
+    @Throws(IllegalStateException::class, RuntimeException::class)
     suspend fun login(username: String, password: String): Boolean = login(Auth(username, password))
+    @Throws(RuntimeException::class)
     suspend fun logout()
+    @Throws(RuntimeException::class)
     suspend fun isLoggedIn(): Boolean
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getNewsPage(): NewsPage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getGradesPage(schoolYear: SchoolYear, schoolYearHalf: SchoolYearHalf): GradesPage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getGradesPage(): GradesPage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getTimetablePage(schoolYear: SchoolYear, periodId: Int?): TimetablePage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getTimetablePage(schoolYear: SchoolYear, periodOption: TimetablePage.PeriodOption? = null) = getTimetablePage(schoolYear, periodOption?.id)
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getTimetablePage(): TimetablePage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getAttendancesPage(schoolYear: SchoolYear, month: Month): AttendancesPage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getAttendancesPage(): AttendancesPage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getAbsencesPage(schoolYear: SchoolYear): AbsencesPage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getAbsencesPage(): AbsencesPage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getTeachersPage(): TeachersPage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getTeacher(teacherTag: String): Teacher
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getTeacher(teacherReference: TeacherReference): Teacher = getTeacher(teacherReference.tag)
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getRoomsPage(): RoomsPage
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getRoom(roomCode: String): Room
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getRoom(roomReference: RoomReference): Room = getRoom(roomReference.roomCode)
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getLocker(): Locker?
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getStudentProfile(): Student
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getStudentProfile(username: String): Student
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getNotifications(): List<NotificationReference>
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getNotification(notification: NotificationReference): Notification
 
     /** @return the list of student's certificates or `null` if the student cannot have any certificates (i.e. he is not in the 4th grade) */
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getStudentCertificates(): List<Certificate>?
+    @Throws(ParseException::class, RuntimeException::class)
     suspend fun getDocumentsPage(path: String = "/dokumenty"): DocumentsPage
     
     companion object