diff --git a/src/commonMain/kotlin/com/github/quillraven/fleks/entity.kt b/src/commonMain/kotlin/com/github/quillraven/fleks/entity.kt
index 052fc62..8be7aad 100644
--- a/src/commonMain/kotlin/com/github/quillraven/fleks/entity.kt
+++ b/src/commonMain/kotlin/com/github/quillraven/fleks/entity.kt
@@ -7,8 +7,9 @@ import kotlin.jvm.JvmInline
 /**
  * An entity of a [world][World]. It represents a unique id.
  */
+@JvmInline
 @Serializable
-data class Entity(val id: Int, val version: Int = 0)
+value class Entity(val id: Int)
 
 /**
  * Type alias for an optional hook function for an [EntityService].