diff --git a/.idea/kotlinc.xml b/.idea/kotlinc.xml
index 131e44d..1e16934 100644
--- a/.idea/kotlinc.xml
+++ b/.idea/kotlinc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="KotlinJpsPluginSettings">
-    <option name="version" value="2.1.20" />
+    <option name="version" value="2.1.21" />
   </component>
 </project>
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
index 7fa622c..2da0296 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -13,7 +13,7 @@ buildscript {
 
 allprojects {
     group = "com.rickclephas.kmp"
-    version = "1.0.0-BETA-10"
+    version = "1.0.0-BETA-10-kotlin-2.1.21-RC2"
 
     repositories {
         mavenCentral()
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 604a2f8..dbb72c2 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,5 +1,5 @@
 [versions]
-kotlin = "2.1.20"
+kotlin = "2.1.21"
 kotlinx-coroutines = "1.10.1"
 android = "8.2.0"
 androidx-lifecycle = "2.8.7"
@@ -8,8 +8,8 @@ atomicfu = "0.26.1"
 # Sample versions
 androidx-compose = "2023.10.01"
 androidx-fragment = "1.6.2"
-ksp = "2.1.20-1.0.31"
-nativecoroutines = "1.0.0-ALPHA-41"
+ksp = "2.1.21-2.0.1"
+nativecoroutines = "1.0.0-ALPHA-43"
 
 [libraries]
 kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }
diff --git a/sample/shared/src/commonMain/kotlin/com/rickclephas/kmp/observableviewmodel/sample/shared/TimeTravelViewModel.kt b/sample/shared/src/commonMain/kotlin/com/rickclephas/kmp/observableviewmodel/sample/shared/TimeTravelViewModel.kt
index 596a966..2fa83e9 100644
--- a/sample/shared/src/commonMain/kotlin/com/rickclephas/kmp/observableviewmodel/sample/shared/TimeTravelViewModel.kt
+++ b/sample/shared/src/commonMain/kotlin/com/rickclephas/kmp/observableviewmodel/sample/shared/TimeTravelViewModel.kt
@@ -13,7 +13,7 @@ open class TimeTravelViewModel: ViewModel() {
      * A [StateFlow] that emits the actual time.
      */
     @NativeCoroutinesState
-    val actualTime = clockTime.map { formatTime(it) }
+    val actualTime: StateFlow<String> = clockTime.map { formatTime(it) }
         .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), "N/A")
 
     private val _travelEffect = MutableStateFlow<TravelEffect?>(viewModelScope, null)
@@ -21,7 +21,7 @@ open class TimeTravelViewModel: ViewModel() {
      * A [StateFlow] that emits the applied [TravelEffect].
      */
     @NativeCoroutinesState
-    val travelEffect = _travelEffect.asStateFlow()
+    val travelEffect: StateFlow<TravelEffect?> = _travelEffect.asStateFlow()
 
     /**
      * A [StateFlow] that indicates if the [currentTime] is fixed.
@@ -29,14 +29,14 @@ open class TimeTravelViewModel: ViewModel() {
      * @see stopTime
      */
     @NativeCoroutinesState
-    val isFixedTime = _travelEffect.map { it is TravelEffect.Fixed }
+    val isFixedTime: StateFlow<Boolean> = _travelEffect.map { it is TravelEffect.Fixed }
         .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), false)
 
     /**
      * A [StateFlow] that emits the current time.
      */
     @NativeCoroutinesState
-    val currentTime = combine(clockTime, _travelEffect) { actualTime, travelEffect ->
+    val currentTime: StateFlow<String> = combine(clockTime, _travelEffect) { actualTime, travelEffect ->
         formatTime(actualTime + travelEffect)
     }.stateIn(viewModelScope, SharingStarted.WhileSubscribed(), "N/A")