diff --git a/api/time.api b/api/time.api
index 6e815c7..f87e131 100644
--- a/api/time.api
+++ b/api/time.api
@@ -170,6 +170,7 @@ public final class Relation : java/lang/Enum {
 	public static final field Meets LRelation;
 	public static final field Overlaps LRelation;
 	public static final field Starts LRelation;
+	public static fun getEntries ()Lkotlin/enums/EnumEntries;
 	public final fun isDisjoint ()Z
 	public final fun isEqual ()Z
 	public final fun isMeeting ()Z
diff --git a/build.gradle.kts b/build.gradle.kts
index 30351d8..81f4799 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,5 +1,5 @@
 plugins {
-    kotlin("multiplatform") version "1.8.22"
+    kotlin("multiplatform") version "1.9.0"
     `maven-publish`
     id("signing")
     id("org.jetbrains.kotlinx.binary-compatibility-validator") version "0.13.2"
diff --git a/src/appleMain/kotlin/Interop.kt b/src/appleMain/kotlin/Interop.kt
index c352b55..bc52572 100644
--- a/src/appleMain/kotlin/Interop.kt
+++ b/src/appleMain/kotlin/Interop.kt
@@ -1,3 +1,4 @@
+import kotlinx.cinterop.ExperimentalForeignApi
 import kotlinx.cinterop.UnsafeNumber
 import kotlinx.cinterop.convert
 import kotlinx.datetime.FixedOffsetTimeZone
@@ -8,6 +9,7 @@ import platform.Foundation.timeZoneForSecondsFromGMT
 import platform.Foundation.timeZoneWithAbbreviation
 import platform.Foundation.timeZoneWithName
 
+@ExperimentalForeignApi
 @UnsafeNumber(["ios_arm64: kotlin.Int", "ios_simulator_arm64: kotlin.Int", "ios_x64: kotlin.Int", "macos_arm64: kotlin.Int", "macos_x64: kotlin.Int", "tvos_arm64: kotlin.Int", "tvos_simulator_arm64: kotlin.Int", "tvos_x64: kotlin.Int", "watchos_arm32: kotlin.Int", "watchos_arm64: kotlin.Int", "watchos_simulator_arm64: kotlin.Int", "watchos_x64: kotlin.Int"])
 public fun TimePeriod<*>.toNSDateComponents(): NSDateComponents {
     val dateComponents = NSDateComponents()
@@ -32,6 +34,8 @@ public fun TimePeriod<*>.toNSDateComponents(): NSDateComponents {
  * `DateTimeException` to denote that lossy conversion would happen, as Darwin internally rounds the offsets to the
  * nearest minute.
  */
+@ExperimentalForeignApi
+@UnsafeNumber(["ios_arm64: kotlin.Int", "ios_simulator_arm64: kotlin.Int", "ios_x64: kotlin.Int", "macos_arm64: kotlin.Int", "macos_x64: kotlin.Int", "tvos_arm64: kotlin.Int", "tvos_simulator_arm64: kotlin.Int", "tvos_x64: kotlin.Int", "watchos_arm32: kotlin.Int", "watchos_arm64: kotlin.Int", "watchos_simulator_arm64: kotlin.Int", "watchos_x64: kotlin.Int"])
 private fun TimeZone.toNSTimeZone(): NSTimeZone = if (this is FixedOffsetTimeZone) {
     require(offset.totalSeconds % 60 == 0) {
         "NSTimeZone cannot represent fixed-offset time zones with offsets not expressed in whole minutes: $this"