diff --git a/core/src/main/kotlin/ai/neuon/utility/json/JsonObjectBuilder.kt b/core/src/main/kotlin/ai/neuon/utility/json/JsonObjectBuilder.kt
index 48449b3..79ddfc2 100644
--- a/core/src/main/kotlin/ai/neuon/utility/json/JsonObjectBuilder.kt
+++ b/core/src/main/kotlin/ai/neuon/utility/json/JsonObjectBuilder.kt
@@ -1,10 +1,13 @@
+@file:OptIn(ExperimentalTime::class)
+
 package ai.neuon.utility.json
 
-import kotlinx.datetime.Instant
 import kotlinx.serialization.json.JsonObjectBuilder
 import kotlinx.serialization.json.put
 import org.bson.types.ObjectId
 import kotlin.time.Duration
+import kotlin.time.ExperimentalTime
+import kotlin.time.Instant
 
 
 fun JsonObjectBuilder.put(key: String, instant: Instant) {