diff --git a/src/commonMain/kotlin/com/github/quillraven/fleks/world.kt b/src/commonMain/kotlin/com/github/quillraven/fleks/world.kt
index fca025d..2a2c4ee 100644
--- a/src/commonMain/kotlin/com/github/quillraven/fleks/world.kt
+++ b/src/commonMain/kotlin/com/github/quillraven/fleks/world.kt
@@ -6,7 +6,6 @@ import kotlinx.serialization.Contextual
 import kotlinx.serialization.Serializable
 import kotlin.native.concurrent.ThreadLocal
 import kotlin.time.Duration
-import kotlin.time.DurationUnit
 
 /**
  * Snapshot for an [entity][Entity] that contains its [components][Component] and [tags][EntityTag].
@@ -455,7 +454,7 @@ class World internal constructor(
      * using the given [duration]. The duration is converted to seconds.
      */
     fun update(duration: Duration) {
-        update(duration.toLong(DurationUnit.NANOSECONDS) * 0.000000001f)
+        update(duration.inWholeNanoseconds * 0.000000001f)
     }
 
     /**
diff --git a/src/commonTest/kotlin/com/github/quillraven/fleks/WorldTest.kt b/src/commonTest/kotlin/com/github/quillraven/fleks/WorldTest.kt
index c42c2f2..be7175b 100644
--- a/src/commonTest/kotlin/com/github/quillraven/fleks/WorldTest.kt
+++ b/src/commonTest/kotlin/com/github/quillraven/fleks/WorldTest.kt
@@ -332,7 +332,7 @@ internal class WorldTest {
         }
         w.system<WorldTestIteratingSystem>().enabled = false
 
-        w.update(1.milliseconds)
+        w.update(1.seconds)
 
         assertEquals(1f, w.deltaTime)
         assertEquals(1, w.system<WorldTestIntervalSystem>().numCalls)