diff --git a/build.gradle.kts b/build.gradle.kts
index a0a735c64..7b002c634 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -44,7 +44,7 @@ allprojects {
                 kotlinOptions {
                     // note: change this to 1.4 when upgrading to Kotlin 1.4
                     // KN can only be built using the current kotlin version.
-                    apiVersion = "1.3"
+                    apiVersion = "1.4"
                 }
             }
         }
diff --git a/buildSrc/src/main/kotlin/Dependencies.kt b/buildSrc/src/main/kotlin/Dependencies.kt
index 28340f365..8f20d85da 100644
--- a/buildSrc/src/main/kotlin/Dependencies.kt
+++ b/buildSrc/src/main/kotlin/Dependencies.kt
@@ -17,7 +17,6 @@ object Dependencies {
     val mockitoInline = "org.mockito:mockito-inline:2.23.4"
 
     val kotlinCoroutinesCore = "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.3"
-    val kotlinCoroutinesNative = "org.jetbrains.kotlinx:kotlinx-coroutines-core-native:1.4.3"
 
     val autoService = "com.google.auto.service:auto-service:1.0-rc4"
 }
diff --git a/spek-runtime/build.gradle.kts b/spek-runtime/build.gradle.kts
index 79c2df5da..b6fecdf26 100644
--- a/spek-runtime/build.gradle.kts
+++ b/spek-runtime/build.gradle.kts
@@ -82,9 +82,6 @@ kotlin {
 
         val nativeMain by creating {
             dependsOn(commonMain)
-            dependencies {
-                implementation(Dependencies.kotlinCoroutinesNative)
-            }
         }
 
         linuxX64("linux") {
diff --git a/spek-runtime/src/nativeMain/kotlin/org/spekframework/spek2/runtime/timeout.kt b/spek-runtime/src/nativeMain/kotlin/org/spekframework/spek2/runtime/timeout.kt
index fa1799833..2625ef1c4 100644
--- a/spek-runtime/src/nativeMain/kotlin/org/spekframework/spek2/runtime/timeout.kt
+++ b/spek-runtime/src/nativeMain/kotlin/org/spekframework/spek2/runtime/timeout.kt
@@ -1,7 +1,7 @@
 package org.spekframework.spek2.runtime
 
 import kotlin.time.ExperimentalTime
-import kotlin.time.MonoClock
+import kotlin.time.TimeSource
 import kotlin.time.measureTime
 
 actual fun getGlobalTimeoutSetting(default: Long): Long {
@@ -18,7 +18,7 @@ actual fun isConcurrentExecutionEnabled(default: Boolean): Boolean {
 
 @UseExperimental(ExperimentalTime::class)
 actual fun measureTime(block: () -> Unit): Long {
-    return MonoClock.measureTime(block).inMilliseconds.toLong()
+    return TimeSource.Monotonic.measureTime(block).inMilliseconds.toLong()
 }
 
 actual fun isDebuggingEnabled(default: Boolean): Boolean {